counting atoms
What elements are listed below?
C H Cl N
Carbon
hydrogen
chlorine
nitrogen
Physical or chemical change?
- change of volume
Physical
What is the formula for speed?
Speed = distance/ time
How many atoms of each element are present below?
CH3COOH
C- 2
H- 4
O-2
Physical or chemical change?
- dissolving sugar in water
Physical
a Car travels a distance of 125 km in 2 hours. What is its speed?
62.5
How many atoms in each element?
Ca(NO₃)₂
1
2
6
Give two examples of chemical change.
Rust
precipitate
light
color change
Rodney rides his bike for 1 hour and 10 minutes At a speed of 20 km/h. what distance did he go?
140 km
How many atoms are in the reactants vs. the products?
2Na + Cl2 ---> 2NaCl
4 on both sides
Balanced
What is a poor conductor and brittle element classified as? For example, Arsenic?
Nonmetal
Describe speed, velocity, and acceleration.
Distance/ time
speed with direction
‘turn, speed up, slow down
On a speed graph, what will show you 'NO MOTION'?
a straight line across that graph
What would be the missing blank in order for this equation to follow the law of conservation?
84 g + ? —> 44 g + 18g + 82
60g
A chemical change creates a N_____ _________.
New substance
Aidan ran 5000 meters from Mrs. Tuggle at an average speed of 6 m/s before he got caught. How long did he run?
833 seconds
On a distance/ time graph, four segments are shown.
segment A- 6 meters in 6 seconds
segment B- 0 meters in 3 seconds
segment C- 4 meters in 2 seconds
segment D- 5 meters in 4 seconds
Which segment has the highest average speed?Segment A- 1 m/s