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Nezavi [6.7K]
2 years ago
13

Which compound in each pair is more soluble in water?(a) Magnesium hydroxide or nickel(II) hydroxide

Chemistry
1 answer:
Alexxandr [17]2 years ago
6 0

What is called compound?

  • In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
  • When the elements come together, they react with each other and form chemical bonds that are difficult to break.
  • These bonds form as a result of sharing or exchanging electrons between atoms.

a) Mg(OH)2 or Ni(OH)2.

Mg(OH)2 1.8×10–11

Ni(OH)2 2.0×10–15

Clearly, Ksp value for Mg(OH)2 is higher , meaning it is MUCH MORE SOLBULE than Nickel

therefore, choose Mg(OH)2.

b)

PbS 3×10–28

CuS 6×10–37

Clearly, PbS is much more soluble than CuS

since Ksp is higher .

c)

Ag2SO4 1.4×10–5

MgF2 3.7×10–8

Clearly, Ag2SO4 has higher Ksp, so it is much more soluble.

Learn more about compound

brainly.com/question/13516179

#SPJ4

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A molecular size affects the rate of evaporation when the larger the intermolecular forces in a compound, the slower the evaporation rate and this correlates with temperature change.

Molecular size seems to have an effect on evaporation rates in that the larger a molecule gets or grows from a base chemical formula, its evaporation rate will get slower.

<h3>What is the molecular size?</h3>

This is a measure of the area a molecule occupies in three-dimensional space as this relates to the physical size of an individual molecule.

Hence, we can see that a molecular size affects the rate of evaporation the larger the forces, the lower the rate.

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5 0
2 years ago
Calculate the volume of a balloon that can hold 113.4 g of nitrogen dioxide, NO2 gas at STP-
Karolina [17]

Answer:

55.18 L

Explanation:

First we convert 113.4 g of NO₂ into moles, using its molar mass:

  • 113.4 g ÷ 46 g/mol = 2.465 mol

Then we<u> use the PV=nRT formula</u>, where:

  • P = 1atm & T = 273K (This means STP)
  • n = 2.465 mol
  • R = 0.082 atm·L·mol⁻¹·K⁻¹
  • V = ?

Input the data:

  • 1 atm * V = 2.465 mol * 0.082atm·L·mol⁻¹·K⁻¹ * 273 K

And <u>solve for V</u>:

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6 0
2 years ago
In a lab, a student dissolves 6.9 g of sodium chloride (NaCl) in 125 g of water (H2O).
kati45 [8]
Hope it cleared your doubt.

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3 years ago
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Scientists will often use a(n) _________________, an object that helps explain ideas about the natural world.

The answer is model.

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Answer:

C. By being honest in recording the results of their own experiments  

Explanation:

Honesty in recording results is ethical behaviour and the basis of scientific research.

A. is wrong. If you repeat the same experiment, you should always get the same result.

B. is wrong. Copying someone else's results is cheating and certainly unethical behaviour.

D. is wrong. Making up data is dishonest and unethical behaviour.

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3 years ago
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