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il63 [147K]
3 years ago
6

What is true about energy?

Chemistry
2 answers:
xeze [42]3 years ago
7 0
The correct answer is option A. Energy cannot be created during an ordinary chemical reaction. There is no such thing as an ordinary chemical reaction. Energy cannot be created or destroyed this is according to the law of conservation of energy. It can only be transformed from one form to another form.
kirill [66]3 years ago
7 0
Among these statements, the correct notion about energy is that energy cannot be created during an ordinary chemical reaction. this follows the law of conservation of mass which states that energy is neither created nor destroyed in any processes.
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What is the concentration of 60 mL of H3PO4 if it is neutralized by 225 mL of 2 M Ba(OH)2?
goldfiish [28.3K]

7.5 M is the concentration of 60 ml of H3PO4 if it is neutralized by 225 ml of 2 M Ba(OH)2.

Explanation:

Data given:

volume of phosphoric acid, Vacid =60 ml

volume of barium hydroxide, Vbase = 225 ml

molarity of barium hydroxide, Mbase = 2M

Molarity of phosphoric acid, Macid =?

the formula for titration is used as:

Macid x Vacid = Mbase x Vbase

rearranging the equation to get Macid

Macid = \frac{Mbase x Vbase}{Vacid}

Macid =\frac{225 X 2}{60}

Macid = 7.5 M

the concentration of the phosphoric acid is 7.5 M and the volume is 60 ml. Thus 7.5 M solution of phosphoric acid is used to neutralize the barium hydroxide solution of 2M.

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Explanation:

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What is a sign that a person may be abusing drugs?
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What is the number of moles in 432g Ba(NO3)2
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First there is a need to calculate the molar mass of Ba(NO₃)₂:

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After finding the molar mass, the number of moles can be identified as:

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