unit three

Question 1

the sum of all the atomic masses in its chemical formula

Answer 1

formula mass

Question 2

molar mass is expressed in ?

Answer 2

g/mol

Question 3

1 mole of any substance equals

Answer 3

6.02 x 10^23 particles of that substance

Question 4

how to find percent composition of an element

Answer 4

element molar mass/compound molar mass x 100(%)

Question 5

percent by mass of all elements in a compound

Answer 5

percentage composition

Question 6

what tells us the stoichiometry of reactants and products in an equation

Answer 6

coefficients

Question 7

how to do mass-mass stoichiometry

Answer 7

mass of given to moles of given to moles of wanted to mass of wanted

Question 8

how to find percent yield

Answer 8

actual yield/ideal yield x 100

Question 9

addition/subtraction with significant figures

Answer 9

answer should have the same number of decimal places as the limiting term

Question 9

how many joules is in one calorie

Answer 9

4.184 J

Question 9

how to calculate theoretical yield

Answer 9

grams to mol to mol to gram

Question 10

multiplication/division with significant figures

Answer 10

number of significant figures in answer should have same number of SF as number with LEAST amount of SF

Question 10

how to calculate actual yield

Answer 10

g actual/100 x g ideal

Question 10

what are the STP conditions

Answer 10

0 degrees celsius,1 atm, 22L/mol

Question 11

identify each element of pv=nRT

Answer 11

p = Pressure
v = Volume (in liters)
n = number of moles
R = gas constant (0.0821 or 62.4)
T = temperature (in Kelvin)

Question 12

1 atm equals ??

Answer 12

760 torr

Question 13

how to convert celsius to kelvin

Answer 13

C degrees + 273.15

Question 14

how to convert fahrenheit to celsius

Answer 14

(F - 32)/1.8

Question 15

characteristics of gases

Answer 15

gasses can be compressed, expanded, have low densities, may be mixed in a fixed volume, and exert pressure uniformly in all directions

Question 16

force exerted on a unit area

Answer 16

pressure

Question 17

what affects the pressure of gas

Answer 17

volume, temperature, and amount of gas

Question 18

what is the ideal gas law

Answer 18

PV = nRT

Question 19

boyle’s law

Answer 19

P1V1 = P2V2

Question 20

charle’s law

Answer 20

V1/T1 = V2/T2

Question 21

combined gas law

Answer 21

P1V1/T1 = P2V2/T2

Question 22

equation used to calculate the molar mass of a gas using PV=nRT when given the mass in grams.

Answer 22

pV = (moles/molar mass)RT

Question 23

dalton’s law of partial pressure equation

Answer 23

P = P1 + P2 + P3…

Question 24

intermolecular forces from strongest to weakest

Answer 24

hydrogen bond, dipole force, induced dipole forc

Question 25

the attraction between dipoles is between positive pole of one molecule and negative pole of another

Answer 25

dipole force

Question 26

attraction between nonpolar forces

Answer 26

induced dipole force

Question 27

attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom

Answer 27

hydrogen bond

Question 28

what law is P1V1/T1 = P2V2/T2

Answer 28

combined gas law

Question 29

what law is P1V1=P2V2

Answer 29

boyles law

Question 30

what law is the pv=nRT

Answer 30

ideal gas law

Question 31

what law is V1/T1=V2/T2

Answer 31

charles law