Chapter 1-2

Question 1

Sig figs

Answer 1

Non zero numbers always
Leading zeros not
Captive zeros do
Trailing zeros only if number had decimal point

Question 2

Sig fig sci not

Answer 2

Only find sig figs for baby numbers

Question 3

Sig figs multiplication/division

Answer 3

sig figs in result equals number in least precise measurement used in calculation

Question 4

Addition and subtraction sig figs

Answer 4

sig figs in result equals number of decimal places in the least precise measurement

Question 5

Monotomics w multiple charges

Answer 5

Ti- +3, +4
Sn- +2, +4
Pt-+2,+4
Hg- +1, +2
Mn- +2, +4, +7
Fe- +2, +3
Au- +1, +3
Cu- +1, +2
Co- +2, +3
Cr- +2, +3, +6
C- +2, +4
As- +3, +5
Sb-+3, +5

Question 6

Ion

Answer 6

Anything that gains or loses an electron

Question 7

Cation

Answer 7

+

Question 8

Anion

Answer 8

-

Question 9

Uncertainty in measurement

Answer 9

A digit that must be estimated is called uncertain a measurement always has som degree of uncertainty
Ex grapefruit 1.5 = 1.476