What is the number of moles of CO2 in a 220.-gram sample of CO2 (gram-formula mass = 44 g/mol)?
1. 0.20 mol
2. 5.0 mol
3. 15 mol
4. 44 mol

the answer is 5.0moles of CO2

Explanation:

if you have done conversion of moles to grams and vice versa

then this might be easy but this should help:

so if you have grams you just divide the given mass by the formula mass.

ie 220g CO2/44 g/mol= 5.0moles

ps i hope this helps

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: