Which substance is a diatomic molecule?
a. he
b. o2
c. co2
d. h2o?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?