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Ksju [112]
3 years ago
13

During this chemical reaction energy is released. In the chemistry lab, this would be indicated by an increase in temperature or

, if the reaction took place in a test tube, the test tube would feel warmer to the touch. Reactions like this release energy because
A) the reaction requires activation energy.

B) the reactants have less potential energy than the products.

C) the reactants have more potential energy than the products.

D) the mass of the products is greater than the mass of the reactants.
Physics
2 answers:
PtichkaEL [24]3 years ago
6 0

Answer:

C) the reactants have more potential energy than the products.

Explanation:

mr Goodwill [35]3 years ago
4 0

Answer:

C) the reactants have more potential energy than the products.

Explanation:

Since there is a difference between the potential energy of the reactants and the products, that energy has to leave the formula and into its surroundings, meaning that there will be a liberation of energy, increasing the temperature of the surroundings and or in the closed system in which the reaction is taking place, that is an exhotermic reaction.

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The earth exerts a force of 500 newtons on an object what is the mass of the object in kg
guajiro [1.7K]

 Weight (that's what the 500 N is) = (mass) x (gravity) .

On Earth, gravity = about 9.8 m/s² , so

                                 500 N = (mass) x (9.8 m/s²) .

Divide each side by 9.8 m/s²: 

                                 Mass = (500 N) / (9.8 m/s²)

                                          =    51 kg  (rounded) .
 


5 0
3 years ago
A 500 kg sports car accelerates uniformly from rest reaching a speed of 30 m/s in 6 seconds .Find the distance travelled by the
Dimas [21]

Answer:

the distance traveled by the sports car is 90 m

Explanation:

Given;

mass of the sports car, m = 500 kg

initial velocity of the sports car, u = 0

final velocity of the sport car, v = 30 m/s

time of motion of the car, t = 6 s

The distance traveled by the sports car is calculated as;

s = (\frac{u+v}{2} )t\\\\s = (\frac{0+30}{2} ) \times 6\\\\s = 15 \times 6\\\\s = 90 \ m

Therefore, the distance traveled by the sports car is 90 m

6 0
3 years ago
you are pushing a friend in a wagon.you push with a force of 40N. your friend and wagon together have a mass of 80kg. ignoring f
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Answer:

a= 0.5 m/s^2

Explanation:

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A container of an ideal gas at 1 atm is compressed to 1/3 its volume, with the temperature held constant, what is its final pres
Sati [7]

Answer:

wla na

Explanation:

hindi kasi magaling sa physic

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