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Makovka662 [10]
3 years ago
8

Please Help!! What is the molality of a solution when 1 mole of NaCl is dissolved in 250 ml of water?

Chemistry
1 answer:
Grace [21]3 years ago
8 0
Molarity = mol/litres

250 mL = 0.25 L

[NaCl] = 1 mol / 0.25 L = 4 M
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when 45 grams of copper (ii) carbonate are decomposed with heat how many grams of carbon dioxide will be produced
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Answer:

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Explanation:

the balanced equation for the decomposition of CuCO₃ is as follows

CuCO₃ --> CuO + CO₂

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number of CuCO₃ moles decomposed - 45 g / 123.5 g/mol = 0.364 mol

according to the molar ratio

1 mol of CuCO₃ decomposes to form 1 mol of CO₂

therefore 0.364 mol of  CuCO₃ decomposes to form 0.364 mol of CO₂

number of CO₂ moles produced - 0.364 mol

therefore mass of CO₂ produced - 0.364 mol x 44 g/mol = 16.02 g

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Answer:

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4 0
2 years ago
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