Transcript Chemquest 7 - Wayne County Public Schools

CHEMQUEST
DENSITY, MASS, AND WEIGHT
CH. 3 SECT. 4
7
DENSITY
The ratio of the mass of an object to its volume.
𝑚𝑎𝑠𝑠
𝑑𝑒𝑛𝑠𝑖𝑡𝑦 =
𝑣𝑜𝑙𝑢𝑚𝑒
Units:
𝑔
g
𝑔
;
;
𝑚𝐿 cm3
𝐿
An intensive property that can be used to identify a
substance.
MASS AND WEIGHT
Mass: the amount of matter in a substance.
Weight: the amount of force gravity pulls down on
an object.
• 𝑤𝑒𝑖𝑔ℎ𝑡 = 𝑚𝑎𝑠𝑠 𝑥 𝑔
• 𝑔 = 9.8 𝑚/𝑠2
Mass does not change, weight is affected by the
amount of gravity pulling down on an object.
SKILLS PRACTICE 7
1. 29.6 g/cm3
2. 19.2 mL
3. 7.6 x 1011 cm3
4. 0.0028 kg/cm3
5. 1,200,000 g/L
6. 0.884 g/cm3
7. 38.15 mL