Module 2 Chapter 3

Question 1

Avagadros constant

Answer 1

6.02 x 10^23

Question 2

water of crystallization

Answer 2

water molecules that are part of a crystalline structure

Question 3

how are liquids and gasses measured

Answer 3

by volume

Question 4

equation for moles with a given concentration and volume

Answer 4

mol = concentration(in mol/dm^3) x volume(in dm^3)

Question 5

how do you convert between moles and grams

Answer 5

rearrange moles = mass/MR to mass = moles x MR to calculate mass in grams

Question 6

molar gas volume

Answer 6

volume per mol of gas molecules at a stated temperature and pressure (usually RTP)

Question 7

RTP

Answer 7

about 20 degrees Celsius and 101kpa (1atm)

Question 8

what is the volume of 1 mole of gas molecules at RTP

Answer 8

24.0dm^3 or 240000cm^3

Question 9

what equation is used to convert between amount of moles of gas and volume of gas

Answer 9

mol = volume/molar gas volume

Question 10

ideal gas equation

Answer 10

P(pa) x V(m^3) = N(mol) x R x T(k)

Question 11

cm^3 to m^3

Answer 11

x10^-6

Question 12

dm^3 to m^3

Answer 12

x10^-3

Question 13

celcius to kelvin

Answer 13

+ 273

Question 14

stoichiometry

Answer 14

ratio of amount of moles of each substance in the balanced equation

Question 15

what is percentage yield

Answer 15

converting of starting materials into a desired product

Question 16

equation for atom economy

Answer 16

sum of molar masses of desired products/sum of molar masses of all products x 100

Question 17

percentage yield equation

Answer 17

actual yield/theoretical yield x 100

Question 18

define atom economy

Answer 18

a measure of how well atoms have been utilised

Question 19

benefits of reactions with high atom economies

Answer 19

they make a high amount of desired products an a little amount ton waste product
they are important for sustainability as they make the best use of natural resources.