Determine the oxidation number of the element that is underlined within the compound. bacro4 (cr is underlined)

answer choices:
+2

+4

+6

-4

-2

-6

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

Rank the four gases (air, exhaled air, gas produced from from decomposition of h2o2, gas from decomposition of nahco3) in order of increasing concentration of co2