Chemistry Chapter 10

Question 0

STP

Answer 0

Standard temperature and pressure
Temp- 0°C
Pressure- 1 atmosphere

Question 1

One mole of an element has a mass equal to its _________ ________ expressed in units of __________

Answer 1

Atomic mass

Gram

Question 2

One mol of has at STP always has a volume of

Answer 2

22.4 L (molar volume) ONLY WORKS FOR GAS

Question 3

Molecular formula

Answer 3

Shows how many atoms of each element are in the molecule

Question 4

Empirical formula

Answer 4

Shows the simplest ratio of these atoms

Question 5

How do you calculate a compound’s mass percent of each element?

Answer 5

Mass of element / mass of compound x 100

Question 6

How do you find the molecular formula from the empirical formula and molar mass

Answer 6

True MM / emp MM

multiply the quotient by the empirical formula’s subscripts

Question 7

What is a hydrate

Answer 7

An ionic compound with water trapped inside

Question 8

Anhydrous salt

Answer 8

The dry ionic compound left behind when water evaporates

Question 9

Heating a hydrate cause it to what

Answer 9

Loose mass, the mass of a hydrate

Question 10

How do you find the % H2O

Answer 10

Mass of water / mass of hydrate x 100