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tester [92]
3 years ago
9

By the end of this lab, you will determine whether you should add cocoa mix (a solid) before or after heating water (liquid) to

make hot chocolate. State a broad question about solubility whose answer would help you determine this.
Chemistry
2 answers:
nikitadnepr [17]3 years ago
6 0
<span>For this lab experiment , the broad question to ask is "what is the solubility of the cocoa mix when mix with hot or cold water". The consistency that will be formed when cocoa mix are dissolved in hot or cold water will give an answer when best to add the cocoa.</span>
irinina [24]3 years ago
6 0

Answer:

format: “What is the effect of X on Y?”

materials: solid dissolved in a liquid

independent variable: temperature

dependent variable: solubility

Explanation:

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3 years ago
Look at this balanced chemical reaction: N2 + 3H2 2NH3
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Answer: A mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

Explanation:

Given: Volume = 450 L

Temperature = 450 K

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Using ideal gas equation, moles of nitrogen are calculated as follows.

PV = nRT

where,

P = pressure

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Substitute values into the above formula as follows.

PV = nRT\\300 atm \times 450 L = n \times 0.0821 L atm/mol K \times 450 K\\n = \frac{135000}{36.945}\\= 3654.08 mol

According to the given equation, 1 mole of nitrogen forms 2 moles of ammonia. So, moles of ammonia formed by 3654.08 moles of nitrogen is as follows.

2 \times 3654.08 mol\\= 7308.16 mol

As moles is the mass of substance divided by its molar mass. So, mass of ammonia (molar mass = 17.03 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\7308.16 = \frac{mass}{17.03 g/mol}\\mass = 124457.96 g

Thus, we can conclude that a mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

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3 years ago
What is the best method for removing water from a hydrated compound?
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Answer:

Heating is the best method

Explanation:

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Explanation:

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