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shutvik [7]
3 years ago
9

Which of the following is NOT an example of a chemical reaction?

Chemistry
1 answer:
Anettt [7]3 years ago
4 0

Answer: D

Explanation:

because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can

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What happens as a result of photoelectric effect
natka813 [3]

Electrons are emitted from the surface of a metal in photoelectric effect.

<h3>What is the photoelectric effect?</h3>

The photoelectric effect is the emission of electron from the surface of a metal when light is shone on the surface..

For electrons to be emitted, the light must have a certain frequency known as threshhold frequency.

Therefore, electrons are emitted from the surface of a metal in photoelectric effect.

Learn more about photoelectric effect at: brainly.com/question/21320305

#SPJ1

5 0
2 years ago
What is the defining characteristic of an exothermic reaction.
xenn [34]
Heat gets given off or emitted during the reaction
Hope this helps and don’t forget to mark as brainliest if you thought it was most helpful :)
7 0
4 years ago
When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous E
Greeley [361]

Answer:

Spontaneous

Explanation:

For a spontaneous reaction , the value for the change in free energy or gibbs' free energy is negative .

The change in free energy , i.e. , ΔG , denotes the maximum amount of usable energy released , as going from initial state , i.e. , the reactant towards the final state , i.e. , the product .

And , the sign of the  ΔG , determines whether the reaction is Spontaneous or non Spontaneous or at equilibrium ,

i.e. ,

if

ΔG < 0 , the reaction is Spontaneous

ΔG > 0 , the reaction is non Spontaneous

ΔG = 0 , the reaction is at equilibrium

For ,

ΔG < 0 , that the reaction proceed without any energy input , hence , it is  Spontaneous in nature .

6 0
3 years ago
What volume of 0.120 M HNO3(aq) is needed to completely neutralize 150.0 milliliters of 0.100 M NaOH(aq)?
True [87]
HNO3 is a strong acid and NaOH is a
strong base. An equal number of moles of
each will create a neutral solution.
(.1500L)(.100M NaOH) = .01500 moles
NaOH, and therefore .015 moles OH-
.01500 moles H+ = .01500 moles HNO3 =
(.120M HNO3)(volume HNO3)
volume HNO3 = .125L HNO3, or 125mL
HNO3
7 0
3 years ago
PLEASE HELP ASAP!!!!!!!!!! WILL GIVE BRAINLIEST TO CORRECT ANSWER!
Natasha2012 [34]
Balance your chemical reaction first. Start by balancing carbon so you have 2 carbons on both sides.

C2H6 + O2 —> 2CO2 + H2O

Now balance your hydrogen so you have 6 hydrogens on both sides.

C2H6 + O2 —> 2CO2 + 3H2O

Now balance your oxygens. You have 7 oxygens on the right and 2 on the left, so multiply O2 by 3.5.

C2H6 + 3.5O2 —> 2CO2 + 3H2O

However, you can’t have a decimal in a coefficient. So, multiply everything by two.

2C2H6 + 7O2 —> 4CO2 + 6H2O

Now use your mole ratio of 6 mol H2O for every 2 mol of C2H6 to solve.

1.4 mol C2H6 • 6 mol H2O / 2 mol C2H6 = 4.2 mol H2O

D) 4.2 moles
3 0
3 years ago
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