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lesya692 [45]
3 years ago
10

An exothermic reaction _____.

Chemistry
2 answers:
pychu [463]3 years ago
8 0
C. releases less energy than it uses
geniusboy [140]3 years ago
8 0

Answer : The correct option is, (B) releases more energy than it uses.

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

Hence, the correct option is, (B) releases more energy than it uses.

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Uranium-238 (U-238) decays into lead-206 (Pb-206). Which of the following is a true statement?
noname [10]
The correct answer is D
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Whats the number of moles of O2(g) needed to completely react with 8 moles of CO(g).
slava [35]
A mole of CO2 = 2 moles of O2
8 CO moles x 2 =

16 moles
7 0
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Which one of the following atoms has the largest radius?<br> Sr, Rb, K, Ca, Y
Alex17521 [72]

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Explanation:

6 0
3 years ago
exactly 5.00 L of air at -50.0 °C is warmed to 100.0 °C. What is the new volume if the pressure remains constant?
ollegr [7]

Answer:

V₂ = 8.36 L

Explanation:

Given data:

Initial volume of gas = 5.00 L

Initial temperature = -50.0°C (-50 + 273 = 223 k)

Final temperature = 100°C (100+273 = 373 k)

Final volume = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 5.00 L × 373 K / 223 K

V₂ = 1865 L.K / 223 K

V₂ = 8.36 L

3 0
3 years ago
Why might it be unwise to drink water straight from a pond
arsen [322]

Answer:

it is because of the bacteria and different things that go into waters such as ponds, rivers, lakes, seas, oceans, streams, and other body of waters and I should also add the chemicals that go into them as well

Explanation:

5 0
2 years ago
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