What is the molecular formula for an 18 carbon alkane

Magnesium a metal or non-metal?

What is the volume of liquid in a round bottom flask of 11.0cm, to the nearest 0.001L.

A hypothesis is a possible explanation or answer to a question. Hypotheses should be testable. Which of the following sentences is the best hypothesis? A. If a person falls asleep, then their heart rate will decrease. B.

Nitrogen has two naturally occuring isotopes, N-14 and N-15. The atomic mass of nitrogen is 14.007 amu. Which isotope is more abundant in nature?

Which one of these elements is an alkaline earth metal

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors

Does density of water depend on the amount of water present?

Which of the following air fronts does not move? a Occluded front b Cold front c Stationary front d Warm front

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?