How many moles of gas are contained in 890 mL at 21.0°C and .987 atm pressure ?( what unit should volume be in?) mol

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock