3 years ago

Can someone please help

Chemistry

1 answer:

Novosadov [1.4K]3 years ago

4 0

Answer:

Water is the answer

Explanation:

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12. 5

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yuradex [85]

4 moles

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4. Calculate the number of carbon (C) atoms present in the 25 mL of sugar.

Nadusha1986 [10]

Answer: $8.38\times 10^{23}atoms$ of carbon

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

mass of sugar= $density\times volume=1.59g/ml\times 25ml=39.75g$

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{39.75g}{342.3g/mol}=0.116moles$

1 mole of sugar $C_{12}H_{22}O_{11})$ contains = $12\times 6.023\times 10^{23}=72.28\times 10^{23}atoms$ of carbon

0.116 mole of sugar $C_{12}H_{22}O_{11})$ contains = $\frac{72.28\times 10^{23}}{1}\times 0.116=8.38\times 10^{23}atoms$ of carbon

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3 years ago