Applied chemistry is key in making ice cream, particularly through managing the crystallization process and emulsion stability. Adjusting the mixture with substances like glucose or corn syrup helps maintain a smooth texture by preventing large ice crystals. Hydrocolloid stabilizers are used to improve emulsion stability, ensuring a creamy consistency.
Explanation:Applied chemistry plays a crucial role in making ice cream, a process filled with fascinating chemical reactions and principles. Making ice cream involves understanding the behavior of mixtures, the crystallization process, and the effects of temperature changes. Particularly, the process of crystallization is central to achieving the smooth texture of ice cream. As the ice cream mixture cools, small ice crystals form. To ensure these crystals remain small, preventing coarse texture, substances like glucose or corn syrup can be added as interferents. These substances disrupt the crystallization of water and fats, maintaining a smooth texture.
In addition to crystallization, emulsion stability is also crucial. The ice cream mix is an emulsion of fat in water, and maintaining this emulsion is key to preventing separation and ensuring a creamy consistency. Hydrocolloid stabilizers, such as locust bean gum, are often added to improve this stability. Therefore, applied chemistry in ice cream making involves manipulating the properties and interactions of ingredients to achieve the desired texture, appearance, and taste of the final product.
how many of the following elements have 2 unpaired electrons in the ground state? C, O, Ti, Si a) 1 b) 3 c) 4 d) 2
Answer: Option (c) is the correct answer.
Explanation:
Atomic number of carbon is 6 and its electronic configuration is [tex]1s^{2}2s^{2}2p^{2}[/tex].
Atomic number of oxygen is 8 and its electronic configuration is [tex]1s^{2}2s^{2}2p^{4}[/tex].
Atomic number of titanium is 2 and its electronic configuration is [tex][Ar]4s^{2}3d^{2}[/tex].
Atomic number of silicon is 14 and its electronic configuration is [tex][Ne]3s^{2}3p^{2}[/tex].
Therefore, we can conclude that out of the given options all the 4 elements have 2 unpaired electrons in the ground state.
Among Carbon (C), Oxygen (O), Titanium (Ti), and Silicon (Si), only Carbon (C) and Silicon (Si) have 2 unpaired electrons in their ground state.
Explanation:The question is asking how many of the following elements: Carbon (C), Oxygen (O), Titanium (Ti), and Silicon (Si) have 2 unpaired electrons in the
ground state
. In a
ground state
, an atom's electrons are all in the lowest possible energy levels. Carbon has 2 unpaired electrons, as its electron configuration ends in 2s^22p^2. Silicon, similar to carbon, also has 2 unpaired electrons with electron configuration ending in 3s^23p^2. However, Oxygen (2s^22p^4) and Titanium (3d^24s^2) do not have 2 unpaired electrons in their ground state, the answer is therefore (d) 2.
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How do you do this problem?
C: incorrect. It caught you. There is only 1 molecule of C6H12O6 that you are given. That means there are 24 atoms in all for that glucose. Don't worry. I got caught as well. I was about to write a note saying that it should be the answer. It shouldn't.
A: has three atoms per molecule. There are 6.02 * 10^23 molecules - an incredibly large number which becomes 3 times its size when you ask about this in moles. Still A, large as it is , is not the answer.
B: H2O2 has 4 atoms per molecule. 4 mols have 4 * 6.02*10^23 atoms in a mol of H2O2. Read this sentence and A very carefully. There is 1 mol of CO2 which equals 3 * 6.02*10^23 atoms in 1 mol of CO2 which has 6.02 * 10^23 molecules per mole. Be sure you understand the difference.
B is the answer.
D and E are parts of a mol. They are bigger than C (much) but much smaller than A or B.
The molecular weight has nothing to do with your answer. Please read B and A until you understand them.
The ph of a 0.55 m aqueous solution of hypobromous acid, hbro, at 25.0 °c is 4.48. what is the value of ka for hbro?
a.2.0 × 10-9
b.1.1 × 10-9
c.6.0 × 10-5
d.3.3 × 10-5
e.3.0 × 104
____________________________________________________
Answer:
Your answer would be a). 2.0 × 10-9
____________________________________________________
Work:
In your question the "ph" of a 0.55 m aqueous solution of hypobromous acid temperature is at 25 degrees C, and it's "ph" is 4.48.
You would use the ph (4.48) to find the ka for "hbro"
[H+]
=
10^-4.48
=
3.31 x 10^-5 M
=
[BrO-]
or: [H+] = 10^-4.48 = 3.31 x 10^-5 M = [BrO-]
Then you would find ka:
(3.31 x 10^-5)^2/0.55 =2 x 10^-9
____________________________________________________
-Julie
What is the percent yield if the actual yield is 25 g and 100 g should have formed?
It is 25%. 25g ÷ 100g × 100% = 25%
In a certain acidic solution at 25 ∘c, [h+] is 100 times greater than [oh −]. what is the value for [oh −] for the solution? in a certain acidic solution at 25 , [] is 100 times greater than [ ]. what is the value for [ ] for the solution? 1.0×10−8 m 1.0×10−7 m 1.0×10−6 m 1.0×10−2 m 1.0×10−9 m
Answer:
1.0 x 10⁻⁸ M.
Explanation:
∵ [H⁺][OH⁻] = 10⁻¹⁴.
∵ [H⁺] = 100 [OH⁻].
∴ 100 [OH⁻][OH⁻] = 10⁻¹⁴.
∴ 100 [OH⁻]² = 10⁻¹⁴.
[OH⁻]² = 10⁻¹⁴/ 100 = 1.0 x 10⁻¹⁶.
∴ [OH⁻] = √(1.0 x 10⁻¹⁶) = 1.0 x 10⁻⁸ M.
Given the data from the question, the value of the concentration of the hydroxide ion OH¯ is 1×10¯⁸ M
What is pH ?This is simply a measure of the acidity / alkalinity of a solution.
The pH measures the hydrogen ion, H⁺ concentration while the pOH measures the hydroxide ion, OH¯ concentration
Relationships between H⁺ and OH¯[H⁺] × [OH¯] = 10¯¹⁴
How to determine OH¯From the question given above, the following data were obtained:
Hydrogen ion concentration [H⁺] = 100[OH¯]Hydroxide ion concentration [OH¯] =?[H⁺] × [OH¯] = 10¯¹⁴
100[OH¯] × [OH¯] = 10¯¹⁴
100 × [OH¯]² = 10¯¹⁴
Divide both side by 100
[OH¯]² = 10¯¹⁴ / 100
[OH¯]² = 10¯¹⁶
Take the square root of both side
[OH¯] = √(10¯¹⁶)
[OH¯] = 1×10¯⁸ M
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Explain why groups 14 and 15 are better representatives of mixed groups than groups 13 and 16
Groups 14 and 15 each contain metals, nonmetals, and metalloids while Group 13 contains metals and a metalloid, and Group 16 contains metalloids and nonmetals.
Explanation;Groups 13–16 of the periodic table contain one or more metalloids, in addition to metals, nonmetals, or both.Unlike other groups of the periodic table, which contain elements in one class, groups 13–16 referred to as mixed groups contain elements in at least two different classes. In addition to metalloids, they also contain metals, nonmetals, or both.Group 14 also known as the carbon group contains carbon which is a non metal, silicon and germanium which are metalloids and tin and lead which are metals.Group 15 also known as the Nitrogen group contains non metals such as oxygen, metalloid tellurium and a metal polonium.Groups 14 and 15 should comprise of metals, nonmetals, and metalloids while on the other hand Group 13 comprise metals and a metalloid, and Group 16 comprise metalloids and nonmetals.
Why group 14 and 15 are better than groups 13 and 16?Groups 13–16 of the periodic table comprise of one or more metalloids. It refers to the mixed groups comprise of elements in at minimum two different classes. Group 14 also called as the carbon group comprise carbon which is a nonmetal, silicon, and germanium. Group 15 also called as the Nitrogen group comprise non metals like oxygen.
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Consider the reaction: so2cl2(g)⇌so2(g)+cl2(g) kp=2.91×103 at 298 k in a reaction at equilibrium, the partial pressure of so2 is 0.156 atm and that of cl2 is 0.370 atm . part a what is the partial pressure of so2cl2 in this mixture?
Answer:
1.98 x 10⁻⁵ atm.
Explanation:
For the reaction: SO₂Cl₂(g) ⇌ SO₂(g) + Cl₂(g), Kp = 2.91 x 10³.∵ Kp = (PSO₂)(PCl₂)/(PSO₂Cl₂).
PSO₂ = 0.156 atm, PCl₂ = 0.370 atm.
∴ 2.91 x 10³ = (0.156 atm)(0.370 atm)/(PSO₂Cl₂)
∴ (PSO₂Cl₂) = (0.156 atm)(0.370 atm)/(2.91 x 10³) = 1.98 x 10⁻⁵ atm.
The partial pressure of [tex]SO_2Cl_2[/tex] in the given mixture is approximately 0.00199 atm.
The equilibrium constant (Kp) expression and the partial pressures of [tex]SO_2[/tex] and [tex]Cl_2[/tex] can be used to calculate the partial pressure of [tex]SO_2Cl_2[/tex] in a given combination.
The equilibrium constant expression for the reaction is:
[tex]Kp = (P(SO_2) * P(Cl_2)) / P(SO_2Cl_2)[/tex]
We are given:
Kp = [tex]2.91 * 10^3[/tex]
[tex]P(SO_2)[/tex] = 0.156 atm
[tex]P(Cl_2)[/tex]= 0.370 atm
substituting the vales into the equilibrium constant expression and solve for [tex]P(SO_2Cl_2)[/tex]:
[tex]2.91 * 10^3 = (0.156 * 0.370) / P(SO2Cl2)\\2.91 * 10^3 * P(SO_2Cl_2) = 0.156 * 0.370\\P(SO_2Cl_2) = (0.156 * 0.370) / (2.91 * 10^3)[/tex]
[tex]P(SO_2Cl_2) = 0.00199 atm[/tex]
Hence, the partial pressure of [tex]SO_2Cl_2[/tex] in the given mixture is approximately 0.00199 atm.
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The compound sb4o5cl2(s), which has been investigated because of its interesting electrical properties, can be prepared by warming a mixture of antimony(iii) oxide and antimony(iii) chloride, both of which are solids. What is the coefficient of antimony(iii) oxide in the balanced equation for the reaction?
5Sb2O3 + 2SbCl3 -> 3Sb4O5Cl2
The coefficient of Sb2O3 in the equation is 5.
Final answer:
The coefficient of antimony(III) oxide in the balanced chemical equation for the reaction to produce Sb4O5Cl2(s) is 4.
Explanation:
The student is asking for the coefficient of antimony(III) oxide in the balanced chemical equation for the reaction to produce Sb4O5Cl2(s). This substance can be prepared by reacting antimony(III) oxide (Sb2O3) with antimony(III) chloride (SbCl3).
To find the coefficient, we need to balance the equation. Let's consider 'a' as the coefficient for Sb2O3 and 'b' for SbCl3. The possible reaction would be:
a Sb2O3(s) + b SbCl3(s) → Sb4O5Cl2(s)
By examining the stoichiometry, we find that for every 4 atoms of antimony, we should have 5 oxygen and 2 chlorine atoms on the reactant side as well. After balancing, we get:
4 Sb2O3(s) + 2 SbCl3(s) → Sb4O5Cl2(s)
Therefore, the coefficient of antimony(III) oxide is 4.
Provide an iupac name for the structure shown.
Answer:
3 methylheptane
Explanation:
just toke the test
Gerontology is the scientific study of aging involving various disciplines. It encompasses the understanding of primary and secondary aging phenomena. Specialized fields such as Social Gerontology and Thanatology are also part of this study.
Explanation:The scientific study of the process and phenomena of aging is called Gerontology. Gerontology is a multidisciplinary field, involving medical and biological scientists, social scientists, and economic scholars. It probes the process of aging and the complications faced as individuals grow older.
As aging affects every aspect of human life, biological, social, and psychological, gerontologists aim to understand what it is like to be an older adult in society. The study includes two types of aging- primary aging, which involves inherent biological factors such as molecular and cellular changes, and secondary aging, which is influenced by controllable factors like exercise and diet.
Gerontology also encompasses the specialized field of Social Gerontology, examining the sociological aspects of aging, and Thanatology, the systematic study of death and dying. Scholars in this field also focus on the impact of societal attitudes and beliefs about the aging process.
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Which of the following is a property of an ionic compound?
A.low boiling point
B.low melting point
C.high melting point
C, ionic compounds have high boiling and melting points as the bonds are very strong and require tons of energy to break.
Answer:
C. High Melting PointExplanation:
I just did this question on my quiz and C was correct.
[Standard Enthalpy of Formation]
Remember to show work and explain.
3. From this data, calculate the change in enthalpy for:
4. Use the information below to solve for the ∆H for the reaction:
Answer:
3. ΔH = 0.30 kJ; 4. ΔH = -84.6 kJ
Step-by-step explanation:
Question 3:
We have three equations:
(I) S(r) + O₂ → SO₂; ΔH = -296.06 kJ
(II) S(m) + O₂ ⟶ SO₂; ΔH = -296.36 kJ
From these, we must devise the target equation:
(III) S(r) ⟶ S(m); ΔH = ?
The target equation has 1S(r) on the left, so you rewrite Equation(I).
(IV) S(r) + O₂ ⟶ SO₂; ΔH = -296.06 kJ
Equation (IV) has 1SO₂ on the right, and that is not in the target equation.
You need an equation with 1SO₂ on the left, so you reverse Equation (II).
When you reverse an equation, you change the sign of its ΔH.
(V) SO₂ ⟶ S(m) + O₂ ; ΔH = 296.36 kJ
Now, you add equations (IV) and (V), cancelling species that appear on opposite sides of the reaction arrows.
When you add equations, you add their ΔH values.
We get the target equation (III)
(IV) S(r) + O₂ ⟶ SO₂; ΔH = -296.06 kJ
(V) SO₂ ⟶ S(m) + O₂; ΔH = 296.36 kJ
(III) S(r) ⟶ S(m); ΔH = 0.30 kJ
Question 4
We have three equations:
(I) C + O₂ ⟶ CO₂; ΔH = -393.5 kJ
(II) H₂ + ½O₂ ⟶ H₂O; ΔH = -285.8 kJ
(III) 2C₂H₆ + 7O₂ ⟶ 4CO₂ + 6H₂O; ΔH = -296.8 kJ
From these, we must devise the target equation:
(IV) 2C + 3H₂ → C₂H₆; ΔH = ?
The target equation has 2C on the left, so you double Equation(I).
When you double an equation, you double its ΔH.
(V) 2C + 2O₂ ⟶ 2CO₂; ΔH = -787.0 kJ
Equation (V) has 2CO₂ on the right, and that is not in the target equation.
You need an equation with 2CO₂ on the left, so you reverse Equation (III) and divide it by 2.
(VI) 2CO₂ + 3H₂O ⟶ C₂H₆ + ⁷/₂O₂; ΔH = 148.4 kJ
Equation (V) has 3H₂O on the left, and that is not in the target equation.
You need an equation with 3H₂O on the right. Triple Equation (III).
(VII) 3H₂ + ³/₂O₂ ⟶ 3H₂O; ΔH = -857.4 kJ
Now, you add equations (V), (VI), and (VII), cancelling species that appear on opposite sides of the reaction arrows.
We get the target equation (IV).
(V) 2C + 2O₂ ⟶ 2CO₂; ΔH = -787.0 kJ
(VI) 2CO₂ + 3H₂O ⟶ C₂H₆ + ⁷/₂O₂; ΔH = 1559.8 kJ
(VII) 3H₂ + ³/₂O₂ ⟶ 3H₂O; ΔH = - 857.4 kJ
(IV) 2C + 3H₂ → C₂H₆; ΔH = -84.6 kJ
The electron configuration of an element is 1s^22s^1. How many valence electrons does the element have?
1
2
3
4
Answer : The number of valence electron present in an element is, 1
Explanation :
Electronic configuration : It is defined as the representation of electrons around the nucleus of an atom.
Number of electrons in an atom are determined by the electronic configuration.
Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.
The given electronic configuration of an element is,
[tex]1s^22s^1[/tex]
That means, the element has 1 valence electrons.
The element has 1 valence electron.
Explanation:The electron configuration of an element is 1s22s1. To determine the number of valence electrons, we look at the highest energy level, which is indicated by the last number in the electron configuration. In this case, the highest energy level is the 2s level. Therefore, the element has 1 valence electron.
What is the basic unit of all matter? A. Neutron B. Atom C. Electron D. Proton E. Nucleus
An atom is the basic unit of all matter. The other answers are just pieces of an atom
Answer:
Atom
Explanation:
An atom is basic unit of all the matter.
Matter can be an element, which has only single kind of atom in it. It is pure form of matter. For example gold is an element and has single kind of atom with same atomic numbers.
Matter can be a compound, which has two or more kinds of atoms.
Example water.
Neutron, proton and electron are sub atomic particles. Electrons are present around a central unit of atom known as nucleus.
Nucleus contains protons and neutrons both.
What is the equilibrium constant for the reaction
Answer:
B. Keq = [SO₃][NO]/[SO₂][NO₂].
Explanation:
For any equilibrium reaction:Keq = [products]/[reactants].
For the reaction: SO₂(g) + NO₂(g) → SO₃(g) + NO(g).
∴ Keq = [SO₃][NO]/[SO₂][NO₂].
A classmate of yours is allergic to bees and thinks it would be fine if bees went extinct but you believe bees are an important part of our ecosystem. What would you say in response to their statement? Support your response with details about biodiversity, food webs, and what would happen if they were to go extinct. (must be at least 5 sentences)
I would say that bees play a vital role in our ecosystem because they produce honey which many animals on the food web eat. Though they are on the lower end of the food web it would still cause many problems because they pollinate flowers. If they did not do that anymore there would be problems with the flowers,etc. Biodiversity is another problem because without them there won’t be as much diversity in our ecosystem and some organisms might die out.
Final answer:
Bees are key pollinators vital for plant reproduction and food production. Their loss would significantly disrupt food webs and could lead to the collapse of ecosystems. The uncertainty of other pollinators filling their role makes bee conservation critical.
Explanation:
Bees play a crucial role in our ecosystems and their extinction would have dramatic consequences for biodiversity, food webs, and the global food supply. Bees are key pollinators, facilitating the reproduction of many flowering plants. The mutualistic relationship between bees and plants is essential for the production of fruits, vegetables, and nuts.
Pesticides, which have been known to kill bees, disrupt this balance and can lead to reduced food yields. The ecological importance of bees extends to their contribution to biodiversity, which is vital for the stability and health of ecosystems. If bees were to go extinct, not only would food production be jeopardized, but entire ecosystems could collapse, affecting all species within them, including humans.
Moreover, bees are part of complex food webs, and their loss would trigger a domino effect, potentially causing the extinction of other species. While some may posit that other pollinators would replace bees, the unique role bees play makes it uncertain that other species could fully compensate for their absence, particularly in the case of certain crops.
Process A: A + B --> C dG = 101.3 kJ/mol
Process B: D --> C + E dG = -101.3 kJ/mol
If you were tasked with the production of compound C for a pharmaceutical company, which process would you use for it's production based on the data provided and why?
a
Process A, because it releases more energy.
b
Process A, because it is a spontaneous process.
c
Process B, because it releases more energy.
d
Process B, because it is a spontaneous process.
D. Process B, because it is a spontaneous process.
Explanation;A spontaneous process is one that will occur without any energy input from the surroundings.A spontaneous reaction may involve an increase or decrease in enthalpy, it may involve an increase or decrease in entropy, but it will always involve a decrease in free energy that is a negative ΔG.Therefore; process B is spontaneous since it has a negative ΔGInside the combustion chamber of a coal-fired power plant
Burning fossil fuels release energy in the form of heat.
Identify the brønsted-lowry acid, the brønsted-lowry base, the conjugate acid, and the conjugate base in each reaction: (a) c5h5n(aq)+h2o(l)⇌c5h5nh+(aq)+oh−(aq) (b) hno3(aq)+h2o(l)⇌h3o+(aq)+no3−(aq) drag the appropriate items to their respective bins.
acids give away protons (H+), bases accept protons, conjugate bases are what u get when when you take the protons from the acid, and conjugate acids are what u get when you add the protons to the base.
so for (a) the C5H5N is the base, water is the acid, C5H5NH+ is the conj acid, OH- is the conj base
(b) HNO3 is the acid, H2O is the base, hydronium ion is the conj. acid, NO3- is the conj base.
Answer: a) [tex]C_5H_5N(aq.)+H_2O(l)\rightarrow C_5H_5NH^+(aq.)+OH(aq.)[/tex]
bronsted- lowry acid : [tex]H_2O[/tex]
conjugate base : [tex]OH^-[/tex]
bronsted- lowry base : [tex]C_5H_5N[/tex]
conjugate acid : [tex]C_5H_5NH^+[/tex]
b) [tex]HNO_3(aq)+H_2O(l)\rightarrow H_3O^+(aq.)+NO_3^-(aq.)[/tex]
bronsted-lowry acid : [tex]HNO_3[/tex]
conjugate base : [tex]NO_3^-[/tex]
bronsted- lowry base : [tex]H_2O[/tex]
conjugate acid : [tex]H_3O^+[/tex]
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
For the given chemical equation:
a) [tex]C_5H_5N(aq.)+H_2O(l)\rightarrow C_5H_5NH^+(aq.)+OH(aq.)[/tex]
Here, [tex]H_2O[/tex] is loosing a proton, thus it is considered as a brønsted-lowry acid and after losing a proton, it forms [tex]OH^-[/tex] which is a conjugate base.
And, [tex]C_5H_5N[/tex] is gaining a proton, thus it is considered as a brønsted-lowry base and after gaining a proton, it forms [tex]C_5H_5NH^+[/tex] which is a conjugate acid.
b) [tex]HNO_3(aq)+H_2O(l)\rightarrow H_3O^+(aq.)+NO_3^-(aq.)[/tex]
Here, [tex]HNO_3[/tex] is loosing a proton, thus it is considered as a brønsted-lowry acid and after losing a proton, it forms [tex]NO_3^-[/tex] which is a conjugate base.
And, [tex]H_2O[/tex] is gaining a proton, thus it is considered as a brønsted-lowry base and after gaining a proton, it forms [tex]H_3O^+[/tex] which is a conjugate acid.
After electrolyzing aqueous zinc iodide (ZnI2), what state is iodine in - solid, liquid, or gas?
After electrolysing ZnI2, iodine crystals are formed, therefore, the answer is solid.
Can you get carbon monoxide poisoning from a gas stove
It is possible yes, however it is more likely not to happen. Stoves do not produce CO unless it is in use, and then you could relatively only get carbon monoxide poisoning if you were in a confined space.
Yes, you can get carbon monoxide poisoning from a gas stove if it is not properly adjusted or ventilated. CO is an odorless, colorless gas that can cause serious health effects, and carbon monoxide detectors are essential for detecting its presence.
Carbon monoxide (CO) is a colorless, odorless gas that can cause serious health issues such as headaches, dizziness, nausea, and even death when inhaled in large amounts. In a household setting, CO levels without gas stoves range from 0.5 to 5 parts per million (ppm), but near a gas stove, especially one that is poorly adjusted, levels can be significantly higher.
Carbon monoxide is produced from the incomplete combustion of hydrocarbon fuels, a process that can occur with gas stoves if they are not properly ventilated. Inhaling high levels of CO can replace oxygen in the blood, leading to serious health consequences. Using carbon monoxide detectors in the home is crucial for safety, as they can alert residents to dangerous levels of CO and help prevent carbon monoxide poisoning.
There are many different types of objects in the solar system. Which type of object is the Sun?
It is a star, since it glows and is very hot.
Which of these substances has the lowest pH? 0.5 M HBr, pOH = 13.5 0.05 M HCl, pOH = 12.7 0.005 M KOH, pOH = 2.3
0.5 M HBr, pOH = 13.5 ; Has the lowest pH
Explanation;From the question;
pH = -Log [OH]
or pH = 14 - pOH
Therefore;
For 0.5 M HBr
[H+] = 0.5 M
pH = - Log [0.5]
= 0.30
For; pOH = 13.5
pH = 14 - pOH
= 14 -13.5
= 0.5
For; 0.05 M HCl
pH = - log [H+]
[H+] = 0.05
pH = - Log [0.05]
= 1.30
For; pOH = 12.7
pH = 14 -pOH
= 14 -12.7
= 1.30
For; 0.005 M KOH,
pOH = - log [OH]
[OH-] = 0.005
pOH = - Log 0.005
= 2.30
pH = 14 - 2.30
= 11.7
For; pOH = 2.3
pH = 14 -pOH
= 14- 2.3
= 11.7
Answer:
solution A, pOH = 1.5
0.5 M HBr, pOH = 13.5
Explanation:
I got it correct on e d g e n u i t y
Have a good day :D
What is a group or family on the periodic table
A group or family on the periodic table is one of the vertical sections on the table. A period is a horizontal section
PLEASE HELP!!!!!
The pH of a solution is 3.40. What is the [H3O+] for the solution?
2.51 × 10−4 M
3.98 × 10−4 M
2.51 × 103 M
3.98 × 104 M
Answer:
3.98 x 10⁻⁴ M.
Explanation:
∵ pH = - log[H₃O⁺]
∴ 3.4 = - log[H₃O⁺].
∴ log[H₃O⁺] = - 3.4.
∴ [H₃O⁺] = 3.98 x 10⁻⁴ M.
Answer: The hydronium ion concentration for the solution is [tex]3.98\times 10^{-4}M[/tex]
Explanation:
pH is defined as the negative logarithm of hydrogen ion concentration or hydronium ion concentration present in a solution.
To calculate the pH of the reaction, we use the equation:
[tex]pH=-\log[H_3O^+][/tex]
We are given:
pH of the solution = 3.40
Putting values in above equation, we get:
[tex]3.40=-\log[H_3O^+][/tex]
[tex][H_3O^+]=3.98\times 10^{-4}M[/tex]
Hence, the hydronium ion concentration for the solution is [tex]3.98\times 10^{-4}M[/tex]
Identify which of the following molecules can exhibit hydrogen bonding as a pure liquid.
The following molecules can exhibit hydrogen bonding as a pure liquid is NH3 (amonia), HC3 -- O -- OH (methanol), CH3CO2H (acetic acid)
Further explanation
Hydrogen bonding is directly connected to Nitrogen, Oxygen, and Fluoride and it (N, O, F) represents the hydrogen bonding. Whereas molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound
Identify which of the following molecules can exhibit hydrogen bonding as a pure liquid.
NH3 (amonia) : Yes, because ammonia has 3 bonds, each between Nitrogen and a Hydrogen.HC3 -- O -- OH (methanol) : Yes, because oxygen and hydrogen in the hydroxyl group that branching off of the carbon share a hydrogen bond.CH2F2 (difluoromethane) : No, because the carbon bonds with two hydrogens and two fluorines, but hydrogen and fluorine never bond with each other.CF4 (tetrafluoromethane) : No, because the carbon bonds with four fluorine atoms, hence no hydrogen involved.HI (hydroiodic acid) : No, because F, O, N involved.CH3CO2H (acetic acid) : Yes, because hydrogen bonds with oxygen directly in the hydroxyl substituent group that forms off of the second carbonC7H6O (benzaldehyde): No, because this is a benzene ring with oxygen and hydrogen branching off of one of the carbons.Learn moreLearn more about hydrogen bonding https://brainly.com/question/1814257Learn more about molecules https://brainly.com/question/1462404Learn more about benzaldehyde https://brainly.com/question/12631576Answer detailsGrade: 9
Subject: chemistry
Chapter: hydrogen bonding
Keywords: hydrogen bonding, molecules, amonia, tetrafluoromethane, benzaldehyde
The molecules that exhibit hydrogen bonding are ammonia NH3, acetic acid CH3CO2H and H2C20H
What is hydrogen bonding?Hydrogen bonding refer to am electrostatic force of attraction that exist between a hydrogen atom which is covalently bonded together to an atom that is more electronegative and another electronegative atom that have a lone pair of electrons. the hydrogen bond is the acceptor.
Therefore, The molecules that exhibit hydrogen bonding are ammonia NH3, acetic acid CH3CO2H and H2C20H.
The question is incomplete bit the options are gotten from another website. here are the options below.
N2H4CF2H2HClCF4*H3CO2H*C2H2O4H2C2OHLearn more about hydrogen bonding here.
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URGENT!!!
Calculate how many grams of Zinc Chloride are produced if 6.5 of Zn is used to react in the chemical reaction below. Be sure to show all of your work.
Zn + 2HCl —> ZnCl2 + H2
= 13.629 g of ZnCl2
Explanation;The equation for the reaction.
Zn(s)+2HCL(aq)=>ZnCl2(aq)+H2(g)
Number of moles of Zinc;
Moles = mass/RAM
= 6.5 g/65g/mol
= 0.1 moles
The mole ration of Zn : ZnCl2 is 1 : 1
Therefore, number of moles of ZnCl2 is 0.1 moles
Mass = moles × Molar mass
= 0.1 ×136.286 g/mol
= 13.629 g
Using the balanced equation Zn + 2HCl —> ZnCl₂ + H₂, we find that 6.5 g of Zinc produces 13.55 grams of Zinc Chloride.
First, let's write the balanced equation:
Zn + 2HCl → ZnCl₂ + H₂The molar mass of Zn is 65.38 g/mol.The number of moles of Zn is:
n(Zn) = 6.5 g / 65.38 g/mol = 0.099 molFrom the balanced equation, we know that 1 mole of Zn reacts to form 1 mole of ZnCl₂. Therefore, the number of moles of ZnCl₂ produced is:
n(ZnCl₂) = 0.099 mol (Zn) × (1 mol ZnCl₂ / 1 mol Zn) = 0.099 molThe molar mass of ZnCl₂ is 136.29 g/mol.Now, let's calculate the mass of ZnCl₂ produced:
m(ZnCl₂) = 0.099 mol × 136.29 g/mol = 13.5 gTherefore, if 6.5 g of Zn is used, the mass of ZnCl₂ produced is 13.55 g.
Which sabatamic particle is electrically neutral and found in the nucleus of an atom
The neutron. It is neutral and found inside the nucleus with positive protons.
A solution at 25 degrees Celsius is 1.0 × 10–5 M H3O+. What is the concentration of OH– in this solution?
Answer:
[OH⁻] = 1.0 x 10⁻⁹ M.
Explanation:
∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.
∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺] = 10⁻¹⁴/(1.0 x 10⁻⁵) = 1.0 x 10⁻⁹ M.
Solar power would be most successful as an energy source in
a. Southern California and Australia.
b. Nova Scotia.
c. Wisconsin, Iowa, Minnesota and Ohio.
d. the Pacific Northwest.
Answer:
The correct answer is: a. Southern California and Australia.
Explanation:
The solar power, in order to be more efficient and more productive, needs to be produced in places that have a lot of sunny days throughout the year. So the wisest and most practical thing to do is to install solar panels at places that are warm and sunny for most of the year. The southern part of California and most of Australia would be excellent choices for something like this. Both places have predominantly warm weather throughout the year, and more important, they have a lot of sunny days throughout the year. That provides the perfect conditions for harvesting the solar energy and use it as an energy source.
Answer:
a
Explanation:
what is the relationship between the kinetic energy of molecules in an object nd the objects temperature?
a. the total kinetic energy of the molecules is not affected by a change in temperature.
b. as the kinetic energy of the modules decreases the temperature increases
c. as the temperature increases the kinetic energy of the molecules increases
d. the kinetic energy always increases whether the temperature increases or decreases
It is C. An increase of temperature results in an increase in kinetic energy of the molecules of the substance. For example, in a gas the molecules will move about faster.