Answer:
B) Heat is given off.
Explanation:
When heat is given off, a chemical change must have occurred and such a reaction is termed an exothermic reaction.
A chemical change is one in which;
- the process is not easily reversible
- leads to the production of new kinds of matter
- involves change in mass
- requires a considerable amount of energy.
Most chemical reactions are accompanied by heat changes.
Time = distance ÷ speed
Time = 1950 ÷ 600
Time = 3.25 hours ( 3 hours 15 minutes )
Answer:
0.4 ml will be affect the density.
Explanation:
Given that,
A student filled the graduated cylinder up to the 9.6 mL mark.
Recorded volume = 10.0 mL
We know that,
Density :
Density is equal to the mass divided by volume.
In mathematically,
Where, m = mass
V = volume
Affect the density :
Affect the density is equal to the change in volume.
We need to calculate the affect the density
Using formula of affect the density
Put the value into the formula
Hence, 0.4 ml will be affect the density.