Answer:
Explanation:
100 mL of a .5 M solution
= 0.1 L of .5 M solution
This solution will contain .1 x .5 mole of solute
= .05 mole of solute
molecular weight of CuSO₄
= 63.5 + 32 + 64
= 159.5 gm
one mole of CuSO₄ = 159.5 gm
.05 mole = 159.5 x .05 gm
= 7.975 gm
7.975 gm of CuSO₄ will be required .
What is the world's most common acid
and also the world's most common base?
Answer:
Thus, as both an amphoteric compound and the most common liquid on Earth, it follows that water is both the most common acid as well as the most common base on planet Earth
The most common acid in the world is sulfuric acid (H2SO4), and the most common base is sodium hydroxide (NaOH).
Explanation:Acids and bases are common substances found in many everyday items. The most common acid in the world is sulfuric acid (H2SO4). It is used in various industrial processes and has a wide range of applications.
The most common base in the world is sodium hydroxide (NaOH). It is commonly known as caustic soda and is used in many household products such as detergents and drain cleaners.
When white light is refracted through an object, you see many different colors because ________. (2 points)
Group of answer choices
the light bends enough to separate the colors
the object absorbs the colors and reflects them
the object causes the light to change directions
the white light travels in a straight line
Answer:
the object causes the light to change direction & the light bends enough to seperate the colors
also, tell me if i'm wrong
How does the molecular property of water affect its cohesive properties?
Is magnesium fluoride ionic or covalent
Answer:
lonic
Explanation:
MgF2 ( Magnesium fluoride ) is ionic.
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⊕ΘΞΠΤ⊕
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Final answer:
Magnesium fluoride (MgF₂) is an ionic compound formed by the transfer of electrons from metallic magnesium to nonmetallic fluoride, resulting in Mg2+ cations and F- anions held together by ionic bonds.
Explanation:
Magnesium fluoride (MgF₂) is an ionic compound. This is because it is formed from magnesium, a metal with a low electronegativity, and fluoride, a nonmetal with a high electronegativity. The electronegativity difference between magnesium and fluoride leads to the transfer of electrons from magnesium to fluoride, creating Mg2+ cations and F- anions. These ions are held together by strong electrostatic forces, known as ionic bonds, which result in the formation of an ionic solid. Ionic compounds have certain characteristics such as high melting points due to the strong ionic bonds in their lattice structure.
Examples of other ionic compounds include KCl, NaCl, and MgCl₂, all of which are made up of a metal and a nonmetal, just like magnesium fluoride. The type of bonding in a compound like MgF₂ also leads to properties such as poor conductivity in the solid state but the ability to conduct electricity when molten. This is because the ions are fixed in place in the solid lattice but can move freely when in the liquid state.
What's the answer to this question?
A- 18.3 degrees
B- 124 degrees
C- 23.5 degrees
D- 50.2 degrees
Which is a characteristic of a weak electrolyte?
It does not dissociate or ionize in water.
It partially dissociates or ionizes in water.
It does not conduct electricity.
It easily conducts electricity.
O
Answer:
A weak electrolyte is an electrolyte that does not completely dissociate in aqueous solution. The solution will contain both ions and molecules of the electrolyte. Weak electrolytes only partially ionize in water (usually 1% to 10%), while strong electrolytes completely ionize (100%).
Explanation:
The weak electrolyte are characterized to be partially dissociates or ionizable in water. Hence, option B is correct.
What is an electrolyte?Electrolyte can be given as the chemical compound present in the form of liquid or gel with the ability to dissociate into the constituent ion on the dissolution or the application of electricity.
The ability of the electrolyte to be dissociated into the constituent ions differentiate them as strong and weak electrolytes. The electrolytes that can be easily dissociated into the constituent ions are termed as strong electrolytes.
The compounds that found not to be completely ionized into the constituent ions on dissolution in water are termed as weak electrolytes. These are partially ionizable. Thus, option B is correct.
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A balloon filled with helium has a volume of 30.0 L and a temperature of 15.0 C. What will the volume of the balloon be if the temperature is increased to 80.0 C and the pressure remains constant?
Answer: 36.8 L
hope this helps
Consider a sample of 11.2 g of ice initially at 0.0 C. How much energy in kilojoules is required to melt the ice and warm it to 22.0 C?
The molecular weight of water is 18.015 g/mol.
PLEASE HELP lol
Answer:
1034.88J
Explanation:
Given that:
mass (m) = 11.2 g, initial temperature = 0°C, final temperature = 22°C, the specific heat capacity of water (C) = 4.2 J/g°C
Temperature difference (ΔT) = final temperature - initial temperature = 22 - 0 = 22°C
The quantity of heat (Q) required to melt the ice can be calculated from the equation:
Q = mCΔT
Q = 11.2 g × 4.2 J/g°C × 22°C
Q = 1034.88J
a solution has a hydronium concentration of 1.3x10^-3 M. what is the pH of the solution?
The pH of the solution with a hydronium ion concentration of 1.3x10⁻³ M is calculated to be approximately 2.886, indicating that the solution is acidic.
The pH of a solution is calculated using the formula pH = -log[H3O+], where [H3O+] is the hydronium ion concentration in moles per liter (M). Given a hydronium ion concentration of 1.3x10^-3 M, we calculate the pH as follows:
Write the concentration of hydronium ions as 1.3x10⁻³ M.
Apply the pH formula: pH = -log(1.3x10⁻³).
Calculate the logarithm: pH = -(-2.886) = 2.886.
Therefore, the pH of the solution is approximately 2.886, which indicates that the solution is acidic.
HELP MEEEE ASAP!!! Answer these questions based on what you learned from the passage. You can assume any body structure comes from a human.
The flagella are like .
The pilli are like .
The capsule is like .
The cell wall is like the .
The ribosomes are like .
The nucleoid is like the .
The cell membrane is like .
The cytoplasm is like happens.
Answer:
1.Legs
2.Arms and hands
3.Armor
4.Skeletal
5.Carpenters
6.Brain
7.Skin
8.Blood
Explanation:
You can google dem and it will show you all the answers
Answer:
legs
arms and hands
skeletal system
carpenter
brain
skin
blood
Explanation:
Why is it that some people get a static shock when they walk across the carpet and touch a metal surface?
Answer:
This happens because there was an electric charge.
How is balancing a chemical reaction similar to taking inventory in a store?
Answer:
The both must be balanced and every input must be accounted for at the output.
Explanation:
In taking inventory at the store, one must make sure that the total inventory is always balanced at the end of the inventory log (all stocks taking out must be accounted for in the end) so also is the chemical reaction in which the total reactants species atoms must equal the total product specie atoms.
Select all the correct answers.
What are some applications of fission reactions?
as a zero-waste energy source
for generating large amounts of heat
for creating stable elements from unstable ones
for creating new, heavier elements
n
as the energy source in nuclear weapons
Reset
Next
Some applications of fission reactions are for generating large amounts of heat and as the energy source in nuclear weapons.
What is a fission reaction?Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei.
Nuclear fission can be useful in terms of generating large amounts of heat that can be used to produce nuclear power and as the energy source in nuclear weapons.
Thus, some applications of fission reactions are for generating large amounts of heat and as the energy source in nuclear weapons.
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Answer:
B, C, E
Explanation:
Mass defect for the isotope thorium-234 = 1.85864 amu.
How many kilograms does the mass defect represent?
A) 1.85864 × 10-10 kg
B)1.12 × 10- 22 kg
C)3.09 × 10-27 kg
D)1.66 x 10-27 kg
Answer:
3.09 × 10-27 kg
Explanation:
I also had this question on edge and got it correct
Answer:
the answer is C
Explanation:
just took this on eng2020
Percent composition H2S2O8
Answer:194.1411 g/mol
Explanation:
During an epic round of Tug-of-War, Jared and James thought they’d be able to beat Mr. Collins no problem. Together, they applied a force of 300 N pulling to the left. But with one arm on the rope and the other at his side, Mr. Collins applied a 300 N force to the right. What is the net force and direction on the rope?
The net force on the rope is equal to zero as both forces are in equal magnitude but in opposite directions.
What is the net force?The net force on an object can be defined as the vector sum of all forces acting on a particle or object. The net force can be described as a single force representing same the effect of the actual forces on the motion of a particle. Net force offers the same value of acceleration as all those actual forces together.
The net force has a similar effect on the rotational motion as all actual forces taken together so it becomes the resultant force. It.
In the given problem, the applied force by Jared and James is in the opposite direction of the force applied by Mr. Collins.
Given, the force applied by James and Jared in the left direction= 300N
The force applied by Mr. Collins in the right direction = -300N
The net force on the rope = 300N + (-300N) = 0
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economics 
At which point would the government be most likely to try to stimulate the economy?124
At which point would a business be most likely to hire new workers?
Answer:
4 & 5
Explanation:
Answer:
4
5
Explanation:
got it right on edg 2021
Ammonia, NH3, is produced by the reaction N2 (g) + 3H2 (g) → 2NH3 (g). if 3.50 mol of nitrogen is present, what volume of NH3 at 25.0°C and 1.15atm of pressure can be made?
a
0.312 L
b
74.5 L
c
157 L
d
149 L
Answer:
Option D. 149L
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
N2 (g) + 3H2 (g) → 2NH3 (g)
Step 2:
Determination of the number of mole of NH3 produced by the reaction of 3.50 mole of N2. This is illustrated below:
From the balanced equation above,
1 mole of N2 reacted to produce 2 moles of NH3.
Therefore, 3.5 moles of N2 will react to produce = 3.5 x 2 = 7 moles of NH3.
Therefore, 7moles NH3 is produced.
Step 3:
Determination of the volume of NH3 produced from the reaction. This can be achieved as shown below:
Data obtained from the question include:
Temperature (T) = 25.0°C = 25.0°C + 273 = 298K
Pressure (P) = 1.15 atm
Number of mole (n) = 7 moles
Gas constant (R) = 0.082atm.L/Kmol
Volume (V) =..?
Applying the ideal gas equation to obtain the volume:
PV = nRT
Divide both side by P
V = nRT /P
V = (7 x 0.082 x 298)/1.15
V = 149 L
Therefore, the volume of NH3 produced from the reaction is 149L
how many carbon atoms are present in a 2.5 carat diamond
The number of carbon atoms present in a 2.5 carat diamond is approximately 2.5 x 10^22, determined by first converting the weight of the diamond to grams, then to moles utilizing the molecular weight of carbon, and finally to atoms using Avogadro’s number.
Explanation:To determine the number of carbon atoms present in a 2.5 carat diamond, we need essential information about carbon and the diamond. The molecular weight of carbon (C) is 12.01 g/mol. We also know that a carat is 200 milligrams (mg) or 0.2 grams (g).
So, a 2.5-carat diamond weighs 0.2 g * 2.5 = 0.5g. We convert the mass of the diamond into moles using the molecular weight of carbon: 0.5 g / 12.01 g/mol = 0.0416 moles.
Then, knowing that one mole of any substance contains Avogadro's number of entities (approximately 6.022 * 10^23), we multiply the number of moles by Avogadro’s number: 0.0416 moles * 6.022 * 10^23 atoms/mole = 2.5 * 10^22 carbon atoms.
So, a 2.5 carat diamond contains about 2.5 * 10^22 carbon atoms.
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What is the pH of a solution that
contains [H+]=3.18 x 10^-8 M?
Answer:
7.50
Explanation:
pH=-log(H3O+)
- Hope that helps! Please let me know if you need further explanation.
What is the percent by mass of a solution that
contains 25 g KNO3 in 400.0 g H20?
Answer: 5.9%
Explanation: e2020
Answer:
c) 5.9%
Explanation:
got it correct on edg
How many moles of molecular oxygen will be needed for the complete combustion of 100.0 g of sulfur dioxide? The product of this reaction is sulfur trioxide
Answer:
0.78 mol O2
Explanation:
2SO2 + O2 -> 2 SO3
64 g SO2 -> 1 mol SO2
100 g SO2 -> x
x= (100 g SO2 * 1 mol SO2)/64 g SO2 x=1.56 mol SO2
1 mol O2 -> 2 mol SO2
x -> 1.56 mol SO2
x= (1.56 mol SO2 * 1 mol O2)/2 mol SO2 x=0.78 mol O2
Answer:
0.7804
Explanation:
Study the following picture. Which of the following statements is not a fact? The bins contain four different types of balls. Balls are used in various competitive sports. All balls are made from leather. According to the data (the picture in this case), the main color of a basketball is orange and the main color of a soccer ball is white.
Answer:
The one that isnt a fact is that all balls are made of leather.
Good luck! Hope this helped!
:)
Explanation:
What limits what scientist can study in their work
Answer:
The confounder
Explanation:
A confounder is a quality or variable that affects the results of the study but is not included in the study itself
Ammonia (NH3(g), AH = -46.19 kJ/mol) reacts with hydrogen chloride (HCl(g), AH = -92.30 kJ/mol) to
form ammonium chloride (NH4Cl(s), AH = -314.4 kJ/mol) according to this equation:
NH3(g) + HCl(9) ► NH4Cl(s)
What is AHxn for this reaction?
The enthalpy of a reaction can be predicted from the enthalpy of reactants and products. The enthalpy of the reaction is - 175.9 kJ/mol.
What is reaction enthalpy ?The enthalpy of a reaction is the heat energy released or absorbed by the reaction system. For heat absorption, enthalpy is positive and for evolution, enthalpy is negative.
Th enthalpy of reaction = enthalpy of products - enthalpy of reaction.
Given enthalpy of reactants
ΔH (NH₃) = -46.19 kj/mol
ΔH(HCl) = - 92.30 kj/mol
ΔH(NH₄Cl) = -314.4 kj/mol
Reaction enthalpy = -314.4 kj/mol - (-46.19 kj/mol +- 92.30 kj/mol ) =- 175.9 kJ/mol.
Therefore, the reaction enthalpy is - 175.9 kJ/mol..
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For the following equation; ____S8 + ___ O2 à ___ SO2 a. State what type of reaction is taking place? b. Balance the equation c. If we started with 4.0 grams of Sulfur, how many moles of Sulfur Dioxide would be produced? (You must show your work)
Answer:
a) Combustion
b) S8 + 8O2 -> 8SO2
c) 0.125 mol SO2
Explanation:
a) Combustion
b) S8 + 8O2 -> 8SO2
c)
[tex]4.0 g S8 (\frac{1 mol S8}{256 g S8})(\frac{8 mol SO2}{1 mol S8} ) =0.125 mol SO2[/tex]
5. A 4.44 L container holds 0.481 mol of O2 at 22.6°C. What is the pressure of the tank?
(Show work and u
Answer: The pressure of the tank will be 2.63 atm
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = ?
V = Volume of gas = 4.44 L
n = number of moles = 0.481
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]22.6^0C=(22.6+273)K=295.6K[/tex]
[tex]P=\frac{nRT}{V}[/tex]
[tex]P=\frac{0.481mol\times 0.0821Latm/K mol\times 295.6K}{4.44L}=2.63atm[/tex]
The pressure of the tank will be 2.63 atm
Answer: The pressure of given tank is 2.63 K.
Explanation:
The given data is as follows.
V = 4.44 L, n (no. of moles) = 0.481 mol,
T = [tex]22.6^{o}C[/tex] = (22.6 + 273) K = 295.6 K
R (ideal gas constant) = 0.0821 atm L/mol K
Now, using the ideal gas equation we will calculate the pressure of the given tank as follows.
PV = nRT
[tex]P \times 4.44 L = 0.481 mol \times 0.0821 atm L/mol K \times 295.6 K[/tex]
P = 2.63 atm
Therefore, we can conclude that the pressure of given tank is 2.63 K.
Which action represents an increase in entropy?
someone arranging a deck of cards in order from aces (low) to kings (high)
green food coloring diffusing through cookie dough
one end of a rod of steel getting warmer while the other end gets cooler
people arranging 80 cans into a pyramid
Answer:
Green food coloring diffusing through cookie dough.
Explanation:
Entropy is a physical quantity for an equilibrium thermodynamic system that measures the degree of organization of the system, or that is the ratio of an increase in internal energy to an increase in temperature of the system.
When the green dye diffuses through the cookie dough there is an increase in entropy, that is, there is an increase in system disorder at the molecular level, where a change in cookie dough occurs.
Answer:
B. green food coloring diffusing through cookie dough
Explanation:
Choose all the answers that apply.
Erosion can be reduced by:
removing topsoil
contour plowing
planting trees
putting up fences
Answer:
removing topsoil, and putting up fencing
Explanation:
hopefully this is correct :)
Tim realized that when he brought a positively charged piece of cloth in contact with a negatively charged sock that they both stuck together. Why did that happen?
Answer:
Static electricity caused the it to be pulled toward each other like magnets. Also, positives and negatives attract.
Explanation:
Answer:
This was due to static electricity or electrostatic induction.
Explanation:
Electrostatic induction, is a redistribution of charges in an object caused by the electric field of a nearby charge. For example, if a positively charged piece of cloth is brought near negatively charged sock, the mobile negatively-charged electrons in the sock will be attracted by the external charge, and move to the side of the metal facing it, creating a negative charge on the surface. When the electrons move out of an area they leave a positive charge due to the metal atoms' nuclei, so the side of the metal object facing away from the charge acquires a positive charge. These induced charges disappear when the external charge is removed.
Static electricity is usually caused when certain materials are rubbed against each other, like wool on plastic or the soles of shoes on carpet. The process causes electrons to be pulled from the surface of one material and relocated on the surface of the other material.