FINAL - STOICHIOMETRY/REVIEW

Question 1

Converting to scientific notation

Answer 1

Positive powers to the ten count after first digit (eg. 299,700,000 = 2.997x10^8) & negative powers only count 0 (eg. 0.00000542 = 5.42x10^-6)

Question 1

Accuracy

Answer 1

How close a measurement is to the true value

Question 2

Precision

Answer 2

How close a measurement is to each other

Question 3

SI units

Answer 3

• Mega 10^6
• Kilo 10^3
• Deci 10^-1
• Centi 10^-2
• Milli 10^-3
• Micro 10^-6
• Nano 10^-9
• Dico 10^-12

Question 4

Multiplication & division significant figure rule

Answer 4

Answer is the least number of significant figures

Question 5

Addition & subtraction significant figure rules

Answer 5

Answer is the least number of decimal places

Question 6

Whole number with no decimal point

Answer 6

Do not count 0 as a significant figure (eg. 540 = 2 significant figure)

Question 7

Stoichiometric conversion

Answer 7

g –> mol –> atom/molecule
atom/molecule –> mol –> g

Question 8

Theoretical yield

Answer 8

Maximum amount of product that can be attained in a chemical equation

Question 9

Actual yield

Answer 9

Actual amount of product attained

Question 10

Percent yield

Answer 10

Actual yield/theoretical yield x100

Question 11

LR

Answer 11

Reactant fully consumed

Question 12

ER

Answer 12

Reactant with left overs