unit 2

Question 1

why would we need to use air as a fluid

Answer 1

when we are using only gases

Question 2

isotope definition

Answer 2

Atoms of the same element that have the same number of protons but a different number of neutrons,

Question 3

What is a weighted average and how do you find it

Answer 3

By calculating an average of an element’s atomic masses, weighted by the natural abundance of each isotope

total # of x divided by total # multiplied by atomic mass

Question 4

LOCOM definition

Answer 4

Law of conversion of mass
(atoms, matter)

Question 5

chemistry highway

Answer 5

grams of x

->divide by molar mass->

moles

->multiply by 6.022x10^23->

of compounds (or atoms) in x

Question 6

what are molar ratios

Answer 6

a conversion factor that relates the amounts in moles of any two substances in a chemical reaction

Question 7

how to find molar ratios

Answer 7

put the moles of one reactant over the moles of the other reactant

Question 8

identity of an isotope

Answer 8

the identity of the isotope is given by the number of protons and neutrons