What is the mass of 2.15 liters of N2 gas at STP? 1.82 grams
2.68 grams
2.92 grams
3.11 grams

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon