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Veronika [31]
2 years ago
11

How many moles does 21. 7 L of gas at STP represent?

Chemistry
1 answer:
Oduvanchick [21]2 years ago
3 0

Answer:

.96875 moles

Explanation:

22.4 liters per mole at STP for a gas

21.7 / 22.4 = .96875 moles

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What is the molarity if 60.4 grams of hydrochloric acid was added to 505 mL of water?
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Answer:

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Explanation:

Molarity refers to the molar concentration of a solution and it can be calculated using the formula below:

Molarity (M) = number of moles (n) ÷ volume (V)

According to this question, the mass of HCl was given to be 60.4 grams and the volume of water as 505 mL.

Using mole = mass/molar mass to convert mass of HCl to moles

Molar mass of HCl = 1.0079 + 35.453 = 36.4609g/mol

mole = 60.4g ÷ 36.4609g/mol

mole = 1.66mol

Volume of water = 505mL = 505/1000 = 0.505L

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Molarity of HCl solution = 3.29 M

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