unit 7 vocab

Question 1

molar mass

Answer 1

use elements atomic mass, ratio betwwwen mass and amount of substance

Question 2

mole ratio

Answer 2

ratio between amount of moles of any two compounds involved in a chemical reaction

Question 3

actual yield

Answer 3

the amount actually produced

Question 4

empirical formula

Answer 4

reduced molecular formula , first infor for scientist

Question 5

stoichiometry

Answer 5

making predictions on chemical reactions based on reactents

Question 6

theoretical yield

Answer 6

amount of possible product given by LR

Question 7

STP

Answer 7

standard temperature and pressure
0 C, 32 F, 1 atmosphere ( air pressure on sea level)

Question 8

Molar volume

Answer 8

1 mole- 22.4 L

Question 9

Limiting reagent

Answer 9

reactent that is used up and controls/limits amount of product

Question 10

Excess reagent

Answer 10

the reactent that is left over

Question 11

Endothermic

Answer 11

Enthalpy of reactents is lower than the enthalpy of products ( heats absorbed)

Question 12

Exothermic

Answer 12

Enthalpy of reactents is higher than the enthalpy of products ( heats released)

Question 13

Enthalpy

Answer 13

the amount of energy of substance (H)

Question 14

Delta H

Answer 14

change in amoutn of enrgy in substance