Question 15 (1 point) Which statement explains why a molecule of \( \mathrm{CH}_{4} \) is nonpolar? Question 16 ( 1 point)

Methane (\( \mathrm{CH}_{4} \)) is nonpolar primarily because of its symmetrical tetrahedral shape. The four hydrogen atoms are evenly spaced around the central carbon atom, creating a uniform distribution of charge. This arrangement ensures that any dipole moments from the C-H bonds cancel each other out, resulting in no net dipole moment for the molecule. In practical terms, nonpolar molecules like methane do not mix well with polar substances, such as water. This is why oil and water don't mix—oil is composed of nonpolar molecules like \( \mathrm{CH}_{4} \), whereas water is polar with distinct positive and negative sides. So, next time you're mixing your salad dressing, remember that the oil won't blend with the vinegar due to their molecular polarity differences!