What is a mole? list everything you know about the mole.
how many atoms are present in 3.8 moles of sodium hydroxide, naoh?
calculate the molar mass for ca(oh)2.

1. A mole is the amount which contains as many elementary particles as there are atoms in 12 grams of carbon-12. It is also the unit used in measuring the amount of matter. A mole also refers to the Avogadro's number of particles present in any substance.

2. 1mole of NaOH contains 6.02x10^23 atoms.

Therefore, 3.8 moles of NaOH will contain = 3.8 x 6.02x10^23 = 2.288 x 10^24 atoms

3. Molar Mass of Ca(OH)2 = 40 + 2(16+1) = 40 2(17) = 40 + 34 = 74g/mol

Explanation:

14,16 18 reacts with group

fe 55.85 g/mol and h2o 18.02 g/mol.