Question

If you need 5 moles of water then how many grams of it will you weigh

Answer 1

Answer on Question #68920 - Chemistry – Other

Question:

If you need 5 moles of water then how many grams of it will you weigh?

Solution:

First, let's find molar mass of H₂O. One molecule consists of 2 atoms of Hydrogen (each with molar mass 1) and 1 atom of Oxygen (with molar mass 16), altogether, $2 \times 1 + 1 \times 16 = 18 \mathrm{~g} / \mathrm{mol}$.

Second, let's find how many grams weigh 5 moles of $\mathrm{H}_2\mathrm{O}$:

$$18 \frac{g}{mol} \times 5mol \approx 90 g$$

Answer:

5 moles of water weighs 90 grams.

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