What is the relationship between a mole and avogadro’s number?

a mole is the mass of avogadro’s number of particles of a substance.

a mole is the amount of a compound that has avogadro’s number of carbon-12 atoms in it.

a mole contains avogadro’s number of particles of a substance.

a mole is the amount of any substance that has the same mass as avogadro’s number of carbon-12 atoms.

What is important to study for nios grade 12 chemistry? i have only one month left.

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Classify this reaction: 2al+n2-> aln.