10. Convert 250 grams of \( \mathrm{CH}_{4} \) to moles.

To convert grams of methane (\( \mathrm{CH}_{4} \)) to moles, you first need to know its molar mass. The molar mass of \( \mathrm{CH}_{4} \) is approximately 16.04 grams per mole (12.01 g/mol for carbon and 4 x 1.008 g/mol for hydrogen). Now, using the formula: \[ \text{Moles of } \mathrm{CH}_{4} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \] \[ \text{Moles of } \mathrm{CH}_{4} = \frac{250 \text{ g}}{16.04 \text{ g/mol}} \approx 15.6 \text{ moles} \] You would have approximately 15.6 moles of \( \mathrm{CH}_{4} \). Now you’re ready to tackle some chemistry! Ever wondered how methane plays a role in our daily lives? This gas is primarily used as a fuel source, heating homes, cooking food, and even generating electricity. Plus, it's a major ingredient in the production of hydrogen and other chemicals, making it vital in various industries. If you want to ace your conversions, remember to always double-check the molar mass based on the periodic table. A common mistake is using rounded values, which can lead to inaccuracies in your calculations. Keeping track of significant figures is also crucial for precise results. Happy calculating!