Answer:
It gains kinetic energy
Explanation:
When something is heated, it’s molecules move faster, like a liquid’s molecules. Since the molecules vibrate faster when it’s heated and kinetic energy is which a body possesses by virtue of being in motion. Therefore, the answer is it gains kinetic energy
This question is about momentum conservation, which belong to physics subject.
You start by assuming that the friction coefficient of bwtween the roller skates and the ice is very low and think there is not friction.
Under those circumstances the convservation of momentum implies:
1) When the roller skater throws the 2 kg balls, it will acquire a momentum equal to v*2kg and the skater will acquire equal momentum in the opposite direction.
That means that the skater will step back and away from the other skater.
2) When the second skater receives the ball with momentum 2kg*v, he will move backward also and further away.
In conclusion, the two skaters will end standing more than 5 m apart facing each other.
Answer:
61.6 g of CO₂ were produced
Explanation:
Let's think the combustion
C + O₂ → CO₂
First of all we determine the moles:
16.8 g . 1mol / 12 g = 1.4 moles
As the question states the oxygen is remained unreacted, the oxygen is the reactant in excess, so the limiting is the C.
1 mol of C produces 1 mol of CO₂, so 1.4 moles in the reactant will produce the same amount products.
We convert the moles to mass.
1.4 mol . 44 g / 1mol = 61.6 g
Answer:
a)4.40 x 10^-3 M/s
b) 8.80 x 10^-3 M/s
Explanation:
Given the reaction equation;
H2O2 (aq) + 3I- (aq) + 2H+ --------> I3- (aq) + 2H2O (l)
We can now write;
a) Rate = -Δ[I-]/3Δt
- (0.868 M - 1.000 M)/ 3 (10.0 s - 0 s)
= 4.40 x 10^-3 M/s
Similarly;
b) Rate = -Δ[H+]/2Δt
- (0.868 M - 1.000 M)/ 3 (10.0 s - 0 s)
(4.40 x 10^-3 m/s) x 2
= 8.80 x 10^-3 M/s