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lukranit [14]
4 years ago
7

In a spontaneous reaction -

Chemistry
1 answer:
Andreyy894 years ago
3 0
A) because spontaneous means in an instant
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Mass can be created and destroyed.
Musya8 [376]

Answer:

Conservation of Energy and Mass

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

5 0
3 years ago
Endothermic or exothermic- grass growing in a lawn.
DochEvi [55]

Answer:

endothermic

Explanation:

7 0
3 years ago
Determine the number of moles in 497 grams of the
satela [25.4K]

Answer:

• The actual number of moles of each element in the smallest unit of the compound. •In water (H 2 O), ammonia (NH 3), methane (CH 4), and ionic compounds, the empirical and molecular

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5 0
2 years ago
16. The concentration of a solution of potassium hydroxide is determined by titration with nitric
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Answer:

M_{base}=0.709M

Explanation:

Hello,

In this case, since the reaction between potassium hydroxide and nitric acid is:

KOH+HNO_3\rightarrow KNO_3+H_2O

We can see a 1:1 mole ratio between the acid and base, therefore, for the titration analysis, we find the following equality at the equivalence point:

n_{acid}=n_{base}

That in terms of molarities and volumes is:

M_{acid}V_{acid}=M_{base}V_{base}

Thus, solving the molarity of the base (KOH), we obtain:

M_{base}=\frac{M_{acid}V_{acid}}{V_{base}} =\frac{0.498M*42.7mL}{30.0mL}\\ \\M_{base}=0.709M

Regards.

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3 years ago
If poking a skunk will always result in the emission (release) of toxic fumes
Dahasolnce [82]
Control: skunk
Independent: poking (the skunk)
dependent: emission of toxic fumes
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