Chem unit 1

Question 1

mega

Answer 1

1x10 6

Question 2

kilo

Answer 2

1 x10 3

Question 3

centi

Answer 3

1x10 -2

Question 4

mili

Answer 4

1x10 -3

Question 5

nano

Answer 5

1x10 -9

Question 6

time

Answer 6

seconds (s), the frequency of radiation given off by a cesium- 133 atom

Question 7

length

Answer 7

meter (m), the distance light travels in a vacuum in a fraction of a seconds

Question 8

mass

Answer 8

kilograms (kg), platinum and iridium

Question 9

temperature

Answer 9

kevin (k), electronic temperature probs make of therma

Question 10

amount of a substance

Answer 10

mole (mol)

Question 11

density

Answer 11

how compact an object is (density= mass divided by Volume)

Question 12

Rules for Sig Figs

Answer 12

1) all non-zero are significant
2) zeros in the middle are significant
3) zeros before numbers are NOT significant
4)zeros after a number are significant only of there is a decimal
5)counting Numbers defined constants/ definition have infinite numbers of sig figs

Question 13

matter

Answer 13

anything that has mass and takes up space

Question 14

how are degrees celsius converted to kelvin

Answer 14

Kelvin= celsius + 273.15