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Hitman42 [59]
3 years ago
5

If the temperature changes in a chemical reaction, what has occurred?

Chemistry
1 answer:
bazaltina [42]3 years ago
3 0

Answer:

Energy was transferred

Explanation:

If the temperature changed, energy must have been added or lost, but not created. Energy can't be created or destroyed.

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Scientific methods are used to study living things or investigate questions and solve problems.
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4 years ago
WILL MARK BRAINLIEST!!<br><br> Need help plsss
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6.32 KJ is how much heat is given off

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3 years ago
A student creates a solution by dissolving some Na2SO4 (molar mass = 142.05 g/mol) in enough water to create 0.500 L of solution
NeX [460]

Answer : The mass of Na_2SO_4 is, 4.43 grams.

Explanation :

As we know that, when Na_2SO_4 dissolve in water then it dissociates to give 2 mole of sodium ion Na^+ and 1 mole of sulfate ion SO_4^{2-}

The chemical reaction will be:

Na_2SO_4\rightarrow 2Na^++SO_4^{2-}

Thus, the concentration of Na_2SO_4 = \frac{\text{Concentration of }Na^+}{2}=\frac{0.125M}{2}=0.0625M

First we have to calculate the moles of Na_2SO_4

\text{Concentration of }Na_2SO_4=\frac{\text{Moles of }Na_2SO_4}{\text{Volume of solution}}

0.0625M=\frac{\text{Moles of }Na_2SO_4}{0.500L}

\text{Moles of }Na_2SO_4=0.0312mol

Now we have to calculate the mass of Na_2SO_4

\text{Mass of }Na_2SO_4=\text{Moles of }Na_2SO_4\times \text{Molar mass of }Na_2SO_4

Molar mass of Na_2SO_4 = 142 g/mol

\text{Mass of }Na_2SO_4=0.0312mol\times 142g/mol=4.43g

Thus, the mass of Na_2SO_4 is, 4.43 grams.

6 0
3 years ago
What do YOU think? Is the movement to 100% renewable energy possible? Why, or why not?
NARA [144]

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i dont know

Explanation:

ask your science teacher

3 0
3 years ago
Part D
qwelly [4]

Answer:

Explanation:

The  number  on the top  right  of  the  symbol shows  ATOMIC NUMBER , if it is written alone only one digit or number overall .

And if the  number is also in bottom left then bottom left number will be ATOMIC NUMBER and top right will be MASS NUMBER

Hope  this will help you *-*

7 0
3 years ago
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