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1 year ago

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

Chemistry

1 answer:

Alexxandr [17]1 year 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.

PbS 3×10–28

CuS 6×10–37

Clearly, PbS is much more soluble than CuS

since Ksp is higher .

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

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Match each renewable energy source with the correct description. solar cell converts sunlight into electricity geothermal energy

natka813 [3]

Answer:

Explanation:

solar cell - converts sunlight into electricity

geothermal energy - heat produced within the Earth

wave energy - turns turbines along coastlines

hydroelectricity - water falling through dams turns turbines, generates electricity

7 0

2 years ago

Read 2 more answers

Use bond energies to calculate the enthalpy of reaction for the combustion of ethane. Average bond energies in kJ/mol C-C 347, C

ivanzaharov [21]

The enthalpy of reaction for the combustion of ethane 2CH₃CH₃ + 7O₂ → 4CO₂ + 6H₂O calculated from the average bond energies of the compounds is -2860 kJ/mol.

The reaction is:

2CH₃CH₃ + 7O₂ → 4CO₂ + 6H₂O (1)

The enthalpy of reaction (1) is given by:

$\Delta H = \Delta H_{r} - \Delta H_{p}$ (2)

Where:

r: is for reactants

p: is for products

The bonds of the compounds of reaction (1) are:

2CH₃CH₃: 2 moles of 6 C-H bonds + 2 moles of 1 C-C bond

7O₂: 7 moles of 1 O=O bond

4CO₂: 4 moles of 2 C=O bonds

6H₂O: 6 moles of 2 H-O bonds

Hence, the enthalpy of reaction (1) is (eq 2):

$\Delta H = \Delta H_{r} - \Delta H_{p}$

$\Delta H = 2*\Delta H_{CH_{3}CH_{3}} + 7\Delta H_{O_{2}} - (4*\Delta H_{CO_{2}} + 6*\Delta H_{H_{2}O})$

$\Delta H = 2*(6*\Delta H_{C-H} + \Delta H_{C-C}) + 7\Delta H_{O=O} - (4*2*\Delta H_{C=O} + 6*2*\Delta H_{H-O})$

$\Delta H = [2*(6*413 + 347) + 7*498 - (4*2*799 + 6*2*467)] kJ/mol$

$\Delta H = -2860 kJ/mol$

Therefore, the enthalpy of reaction for the combustion of ethane is -2860 kJ/mol.

I hope it helps you!

7 0

2 years ago

How many chiral carbon atoms does the monosaccharide altrose have?

lina2011 [118]

4 In the open chain, 5 in the cyclic. Just like glucose.

6 0

2 years ago

How many molecules are contained in 0.800 mol o2?

Ksenya-84 [330]

Multiply .800 moles of O2 by Avagadro's number divided by 1 mole. This will get rid of the moles on the bottom and leave you with molecules. So technically .800 times 6.02x10^23.

6 0

2 years ago

Ammonia, NH3, is a typical ingredient in household cleaners. It is produced through a combination reaction involving N2(g) and H

GalinKa [24]

The balanced chemical reaction is:

N2 + 3H2 = 2NH3

We are given the amount of hydrogen gas to be used in the reaction. This will be the starting point of the calculations.

24.0 mol H2 (2 mol NH3 / 3 mol H2 ) = 16 mol NH3

Therefore, ammonia produced from the reaction given is 16 moles.

3 0

3 years ago