Question

1.How many moles of water does 6.02x1023 molecules represent?
2.Convert 3.01x1023 molecules of C2H6 to moles.
3. How many moles of glucose does 1.2x1024 formula units represent?
4. How many moles of CaCl2 does 2.41x1024 formula units represent?

Answer 1

Answer on Question #50410, Chemistry, Other

1. How many moles of water does $6.02 \times 10^{23}$ molecules represent?

2. Convert $3.01 \times 10^{23}$ molecules of $\mathrm{C}_{2} \mathrm{H}_{6}$ to moles.

3. How many moles of glucose does $1.2 \times 10^{24}$ formula units represent?

4. How many moles of $\mathrm{CaCl}_2$ does $2.41 \times 10^{24}$ formula units represent?

Solution 1:

$$n = \frac {N}{N _ {A}}$$ $$N _ {A} = 6. 0 2 \times 1 0 ^ {2 3}$$ $$n = \frac {6. 0 2 \times 1 0 ^ {2 3}}{6. 0 2 \times 1 0 ^ {2 3} \mathrm{mol}^{-1}} = 1 \mathrm{mol}$$

Answer 1:

1 mol of water

Solution 2:

$$n = \frac {N}{N _ {A}}$$ $$N _ {A} = 6. 0 2 \times 1 0 ^ {2 3}$$ $$n = \frac {3. 0 1 \times 1 0 ^ {2 3}}{6. 0 2 \times 1 0 ^ {2 3} \mathrm{mol}^{-1}} = 0. 5 \mathrm{mol}$$

Answer 2:

0.5 moles of $\mathrm{C}_{2} \mathrm{H}_{6}$

Solution 3:

$$n = \frac {N}{N _ {A}}$$ $$N _ {A} = 6. 0 2 \times 1 0 ^ {2 3}$$ $$n = \frac {1. 2 \times 1 0 ^ {2 4}}{6. 0 2 \times 1 0 ^ {2 3} \mathrm{mol}^{-1}} = 1. 9 9 \mathrm{mol}$$

Answer 3:

1.99 moles of glucose

Solution 4:

$$n = \frac {N}{N _ {A}}$$ $$N _ {A} = 6. 0 2 \times 1 0 ^ {2 3}$$ $$n = \frac {2. 4 1 \times 1 0 ^ {2 4}}{6. 0 2 \times 1 0 ^ {2 3} \mathrm{mol}^{-1}} = 4 \mathrm{mol}$$

Answer 4:

4 moles of $\mathrm{CaCl}_2$

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