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Digiron [165]
3 years ago
6

Identify the type of reaction for each of the following as combination, decomposition, single replacement, double replacement, o

r combustion:
a. A metal and a nonmetal form an ionic compound.

b. A compound of hydrogen and carbon reacts with oxygen to produce carbon dioxide and water.

c. Heating calcium carbonate produces calcium oxide and carbon dioxide.
Chemistry
1 answer:
Hatshy [7]3 years ago
7 0

Answer:

a

Explanation:

pls sdame

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1. Complete the reaction illustrating the hydration reaction of a strong electrolyte CaCl2​
makkiz [27]

Answer:

CaCl₂(s) ⟶ Ca²⁺(aq) + 2Cl⁻(aq)

Explanation:

When the calcium chloride dissolves. the calcium and chloride ions leave the surface of the solid and go into solution as hydrated ions.

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What is napping in the picture ​
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What is the value of freezing point depression of a solution of 15.0g of NaCl in 250g of water?
kobusy [5.1K]

Answer:

-3.82ºC is the freezing point of solution

Explanation:

We work with the Freezing point depression to solve the problem

ΔT = m . Kf . i

ΔT = Freezing point of pure solvent - freezing point of solution

Let's find out m, molality (moles of solute in 1kg of solvent)

15 g / 58.45 g/mol = 0.257 moles of NaCl

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i = 2 (Van't Hoff factor, numbers of ions dissolved)

m = mol /kg → 0.257 mol / 0.250kg = 1.03 m

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0ºC - Tºf = 1.03m . 1.86ºC/m . 2

Tºf  = -3.82ºC

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3 years ago
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