How many milliliters of a stock solution of 17.0 m hno3 would you have to use to prepare 0.500 l of 0.200 m hno3? ml?
If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice
Which element on the periodic table has chemical properties that are most similar to carbon?
The element which has most similar chemical properties to carbon is silicon.
What are chemical properties?These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.
These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.
The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.Chemical properties are almost similar for elements in a group.
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What organic compound is phosphorus found in?
Final answer:
Phosphorus is found in biological organic chemistry in the form of phosphate groups, including in essential molecules such as DNA and ATP, and as part of organophosphates like methyl phosphate.
Explanation:
Phosphorus is found in many organic compounds as part of phosphate groups. In terms of biological organic chemistry, phosphorus is vital as the central atom in the phosphate group, which is involved in various structures such as phosphates, diphosphates, and triphosphates. These phosphate groups are linked to a carbon atom by phosphate ester functionality, forming the backbone of essential biological molecules like DNA and ATP.
Organophosphates, for instance, are a category of compounds that contain a phosphorus atom bonded to four oxygens, one of which is also bonded to a carbon. An example of this is methyl phosphate, where the phosphorus is sp³ hybridized. Derivatives of phosphoric acid, such as phosphate esters and diesters, are also important in biochemistry, being present in nucleic acids, proteins, and membrane lipids.
A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have a necklace 36 cm long?
To make a necklace 36 cm long, you would need approximately 1241 gold atoms.
Explanation:To determine the number of gold atoms needed to make a necklace of a certain length, we need to calculate the number of gold atoms that can fit along the length of the necklace. The radius of a gold atom is given as 145 pm. To convert the length of the necklace to picometers (pm), we multiply 36 cm by 10,000 to get 360,000 pm.
Dividing the length of the necklace by the diameter of a gold atom, which is twice the radius, we get the number of gold atoms needed.
Number of gold atoms = Necklace length / (2 * Radius) = 360,000 pm / (2 * 145 pm) = 1241 atoms. Therefore, you would need approximately 1241 gold atoms to make a necklace 36 cm long.
Is "a stitch in time saves nine" qualitative or quantitative?
What types of molecules dissolve easily in water?
"Polar molecules" can be dissolved easily in water. A further explanation is provided below.
The neutrality, as well as unconvinced polar molecule, really does have an asymmetrical inner charge distribution which then leads to largely positive (+) as well as partially negative (-) areas. All of these are dissolved by rainwater, stone, pots, pan, sugar, salt as well as coffee grounds. Dissolving matters are termed formation of soluble as well as the fluid particles disintegrate is referred to as a solvent.
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What is the primary difference between a hypothesis and a theory?
A theory is supported by more data and observations than a hypothesis is.
A hypothesis is falsifiable, but a theory has been proven to be correct.
A theory is a prediction, but a hypothesis is an explanation.
A hypothesis is more reliable than a theory.
All of the halogens __________. a. exhibit metallic character b. form salts with alkali metals with the formula mx c. exist under ambient conditions as diatomic gases d. tend to form negative ions of several different charges e. tend to form positive ions of several different charges
Recall the formula of glucose is c 6 h 12 o 6 . how many carbon, oxygen, and hydrogen atoms will you need for three glucose molecules
Three glucose molecules would require 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
Explanation:The formula for glucose is C6H12O6, which means each molecule of glucose is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Thus, for three glucose molecules, you would need 3 times the amount of each type of atom. So, you would need 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
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what chemical substances do electrolytes belong to
Chlorine released from chlorofluorocarbons (cfcs) reacts with ozone in the atmosphere to form oxygen. the proposed reactions are cl(g)+o3(g)→clo(g)+o2(g) clo(g)+o(g)→cl(g)+o2(g) identify the species that acts as a catalyst and the one that acts as an intermediate in these reactions.
In the two-step reaction involving chlorine, ozone, and oxygen, chlorine acts as the catalyst because it helps speed up the reaction and is not used up in the process. Chlorine monoxide acts as the intermediate since it is formed in one step and then consumed in a following step.
Explanation:In the given reactions, the species that functions as a catalyst is the chlorine atom (Cl). The reason it is a catalyst is because it is not consumed in the overall reaction; it speeds up the process by reacting with ozone to form ClO which then reacts with another oxygen atom to reform Cl and thus is available for further reaction.
On the other hand, the species that acts as an intermediate is Chlorine monoxide (ClO). An intermediate is a species which is produced in one step of a reaction and consumed in a later step, and thus does not appear in the overall equation. In this case, ClO is formed in the first reaction and then reacts in the second step to produce Cl and O2 thereby not appearing in the overall reaction.
These reactions are particularly significant in the study of the depletion of the ozone layer in the stratosphere. This often occurs due to the breakdown of chlorofluorocarbons (CFCs) which release chlorine atoms that can catalyze the destruction of ozone.
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If an object has a mass of 3.00 g and a density of 0.023 g/ml, what is its volume?
Final answer:
The volume of the object is 130.43 ml.
Explanation:
The volume of an object can be calculated by dividing its mass by its density. In this case, the mass of the object is 3.00 g and the density is 0.023 g/ml. To find the volume, we can use the formula:
Volume = Mass / Density
Substituting the given values, we have:
Volume = 3.00 g / 0.023 g/ml = 130.43 ml
Which statement describes a limitation of the kinetic-molecular theory for a gas?
The theory assumes that particles do not experience intermolecular forces.
The theory states that pressure is inversely proportional to volume.
The theory assumes that particles are in random and continuous motion.
The theory states that pressure increases with temperature.
Answer:
particles don't experience intermolecular forces
Explanation:
Combustion analysis of toluene, a common organic solvent, gives 8.20 mg of co2 and 1.92 mg of h2o. if the compound contains only carbon and hydrogen, what is its empirical formula?
A single electron has a charge of 4.5×10−15 z . using zeets and a fictitious unit of mass called the wiggle, w, the charge-to-mass ratio of an electron is 5.4×106 z/w . what is the mass of an electron in wiggles?
Using the charge-to-mass ratio and the given charge of an electron, the mass of an electron is calculated to be approximately 8.333×10−21 wiggles.
Explanation:To calculate the mass of an electron in wiggles (w), given that a single electron has a charge of 4.5×10−15 z and the charge-to-mass ratio of an electron is 5.4×106 z/w, we can use the formula:
Charge-to-mass ratio = Charge/Mass
Plugging in the values we have:
5.4×106 z/w = 4.5×10−15 z / Mass in wiggles
To find the mass in wiggles, we rearrange the formula to solve for mass:
Mass in wiggles = Charge / Charge-to-mass ratio
Mass in wiggles = 4.5×10−15 z / 5.4×106 z/w
Mass in wiggles = 8.333×10−21 w
Therefore, the mass of an electron is approximately 8.333×10−21 wiggles.
The mass of an electron, given a charge of 4.5×10⁻¹⁵ z and a charge-to-mass ratio of 5.4×10⁶ z/w, is approximately 0.8333 × 10⁻²¹ wiggles.
Let's solve for the mass of the electron:
The charge of the electron, q, is 4.5×10⁻¹⁵ z.The charge-to-mass ratio (q/m) is 5.4×10⁶ z/w.We need to find the mass (m), so we rearrange the formula: q/m = 5.4×10⁶ z/wSolving for m, we get: m = q / (q/m) = (4.5 × 10⁻¹⁵ z) / (5.4 × 10⁶ z/w)Simplifying, m = (4.5/5.4) × 10⁻²¹ w ≈ 0.8333 × 10⁻²¹ wThus, the mass of the electron is approximately 0.8333 × 10⁻²¹ wiggles.
Inductive reasoning requires _____.
A: creative thought
B: a computer
C: algorithms
D: bias
Inductive reasoning requires creative thinking.
How is the atomic mass of an element calculated
The atomic mass of an element is calculated by taking the weighted average of the mass numbers of all its naturally occurring isotopes, calculated by the sum of the protons and neutrons in an atom.
The atomic mass of an element is primarily the total mass of its protons and neutrons. Electrons have a negligible mass and thus are not typically included in the atomic mass calculation. To calculate the atomic mass of an element, you first need to know its mass number, which is the sum of the number of protons and neutrons.
The number of protons is the element's atomic number, and it defines the type of element. For example, carbon (C) has an atomic number of 6, hence it has 6 protons. Carbon's most common isotope has 6 neutrons, therefore, its mass number is 12.
However, because elements can have multiple isotopes with different numbers of neutrons, the atomic mass listed on the periodic table is a weighted average of the mass numbers of all the naturally occurring isotopes of an element. For instance, chlorine (Cl) has an atomic mass of 35.45 because it mainly exists as isotopes with mass numbers of 35 (17 protons and 18 neutrons) and 37 (17 protons and 20 neutrons).
Describe how clastic sedimentary rock differs from chemical and organic sedimentary rock
Clastic sedimentary rocks form from the deposition of eroded particles of rock. Chemical or non-clastic sedimentary rocks form through chemical precipitation. Organic deposits are products of biological activity and the remains are deposited and consolidated into rock.
Which three groups of the periodic table contain the most elements classified as metalloids (semimetals)?
Answer:
germanium
Explanation:
EDGE 2021
Second one on that question is
promethium
O, li, c which electrons experience the greatest effective nuclear charge? express your answer as a chemical formula.
Which types of substances dissolve better in water: hydrophobic or hydrophilic substances? why do you think so?
An atom has 2 protons in its nucleus. Which of the following must be true for this atom to have no net electrical charge?
Question 2 options:
A.The atom has 2 negatively charged electrons outside the nucleus.
B.The atom also has 2 positively charged neutrons in the nucleus.
C.The atom has 2 negatively charged electrons in the nucleus.
D.The 2 positive protons have no influence on the overall charge of the atom.
Answer:the atom has 2 negatively charged electrons outside the nucleus
Explanation:
Scientists noticed that the ozone layer was thinning. What was occurring at the same time?
What would you need to do to calculate the molality of 10 mol of nacl in 200 mol of water?
The conversion of 200 mol of water to kilograms of water is needed to calculate the molality of 10 mol of NaCl in 200 mol of water. Thus, the correct option is A.
What is Molality?Molality is the measure of concentration of a solution. It is the number of moles of solute which are present in a solution that is corresponding to about 1 kg or 1000 g of solvent solution. This amount contrasts with the definition of molarity which is based on the volume of solution. A commonly used unit for molality in chemistry is mol/kg of the solvent molecule.
The formula for calculation of Molality is:
m = mol/ kg
where, m = molality of solution,
mol = number of moles of solute,
kg = kilogram of solvent
The conversion of 200 mol of water to kilograms of water is necessary for the calculation of molality of the solution.
Here, Solute (mol) = 10 mol NaCl
Solvent (Kg) = 200 mol water (Convert to kilograms of water).
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
What would you need to do to calculate the molality of 10 mol of NaCl in 200
mol of water?
A. Convert the 200 mol of water to kilograms of water.
B. Convert the 200 mol of water to liters of water.
C. Convert the 10 mol of NaCl to grams of NaCl.
D. Convert the 10 mol of NaCl to kilograms of NaCl.
Mendeleev periodic table was a useful tool because it enables scientists to
Answer:
Mendeleev's periodic table was a useful tool because it enables scientists to predict properties of unknown elements.
Explanation:
How many oxygen atoms are in 6.90 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.
Answer:
There are 1.44 x 10^23 atoms of oxigen in 6.90 grs of Al2(SO4)3.
Explanation:
To solve this problem you have to find:
1) The molecular mass of Al2(SO4)3;
2) Estimates the percentage of oxigen and express it in terms of its moles.
3) Calculate the number of atoms using Avogadro´s Number.
1) Molecular mass Al2(SO4)3= 2x26,98 + 3x31.06 + 12x16 =339.14 grs/mol.
2) If in the molecular mass of the compound there are 192 grs/mol (12x16) of oxigen, in 6.90 g will be:
192 grs/mol Oxigen ------------- 339.14 grs/mol Al2(SO4)3
x= 3.90 grs/mol-------------------- 6.90 grs/mol Al2(SO4)3
Then if one mol of oxigen has a mass of 16 grs, 3.90 grs represents....
1 mol oxigen ------------- 16 grs of oxigen
x= 0.24 moles------------ 3.90 grs of oxigen
3) There are 6,022 x 10^23 (Avogrado´s number) atoms of oxigen in a mol of oxigen, so in 0.24 moles will be
1 mol oxigen ---------------- 6,022 x 10^23 atoms of oxigen
0.24 moles oxigen ------- x = 1.44 x 10^23 atoms of oxigen.
Summarizing there are 1.44 x 10^23 atoms of oxigen in 6.90 grs of Al2(SO4)3.
1) This element has more than 50 but less than 75 protons and it is in Group 17.
2)This element has more electrons than oxygen but fewer electrons than neon.
3)This element has an atomic number lower than that of aluminun but an atomic mass that is greater than sodium.
4)This Group 2 element has fewer protons than bromine but more protons than sulfur.
5)This element has an atomic number that is one greater than platinum.
A chemical element, popularly known as an element, is any substance that can be broken into simple molecules by ordinary chemical reactions, further calculation can be defined as follows:
This element belongs to Group 17 IODINE and contains more than 50 but less than 75 protons (I).The element contains more electrons than oxygen yet fewer electrons as neon FLUORINE (F).The element has a lower atomic number than aluminum yet a higher atomic weight than sodium MAGNESIUM (Mg).The Group 2 element contains fewer protons than bromine but much more protons as sulfur CALCIUM (Ca).Each element does have an atomic number one higher than platinum GOLD/AURUM (Au).Therefore, the final answer is "Iodine, Fluorine, Magnesium, Calcium, and Gold".
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The addition of heat to a pond causes serious problems for the aquatic plants because the increase in water temperature _______.
10,300 milliliters is the same as: cm3 and L
For this case what you should do is keep in mind the following conversions:
[tex] 1 milliliter = 1 cm ^ 3 [/tex]
[tex] 1000 milliliters = 1 L [/tex]
Therefore, by applying the conversions we have:
For cubic centimeters:
[tex] (10,300mL) (1\frac{cm^3}{mL}) = 10,300cm ^ 3 [/tex]
For liters:
[tex] (10,300mL) (\frac{1}{1000}\frac{L}{mL}) = 10.3 L [/tex]
Answer:
10,300 milliliters is the same as:
[tex]10,300cm ^ 3[/tex]
[tex]10.3 L[/tex]