The equation for the reaction between potassium carbonate and nitric acid is shown. K2CO3 + 2HNO3 + 2KNO3 + H2O + CO2
Which volume of carbon dioxide is produced from 69 g of potassium carbonate?

A 6 dm3
B 12 dm
C 24 dm3
D 48 dm3

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.

What happens to isotopes that are unstable?

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride