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3 years ago

How can I get the percentage recovery?

1 answer:

3 0

If you collected 7.0 grams of something the percentage recovery would be 70% (7/10 x 100).
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A percentage recovery is something like that

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The specific heat of copper metal is 0. 385 J/(g °C). How much energy must be added to a 35. 0-gram sample of copper to change t

Rus_ich [418]

The amount of heat required for changing the temperature of copper has been 606 J. Thus, option B is correct.

Specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The heat required to raise the temperature has been expressed as:

$\rm Heat=mass\;\times\;specific\;heat\;\times\;Change\;in\;temperature$

<h3>Computation for the heat energy required</h3>

The given specific heat of copper has been $\rm 0.385\;J/g^\circ C$

The mass of copper has been, $\rm 35\;g$

The initial temperature of copper has been, $\rm 20^\circ C$

The final temperature of copper has been, $\rm 65^\circ C$

The change in temperature has been, $\Delta T$

$\Delta T=\text{Final\;temperature-Initial\;temperature}\\\Delta T =65^\circ \text C-20^\circ \text C\\\Delta T=45^\circ \text C$

Substituting the values for the heat required as:

$\rm Heat=35\;g\;\times\;0.385\;J/g^\circ C\;\times\;45^\circ C\\Heat=606\;J$

The amount of heat required for changing the temperature of copper has been 606 J. Thus, option B is correct.

Learn more about specific heat, here:

brainly.com/question/2094845

7 0

2 years ago

A chemical change is like a physical change because no new substance is formed. Agree or DIsagree and reason why

aleksandrvk [35]

I disagree, because a physical change changes the form, and a chemical change is a process where one or more substances are altered into new substances.

5 0

3 years ago

Is Sr3(PO4)2 ionic or covalent

lana66690 [7]

Sr3(PO4)2 is definitely Ionic

6 0

4 years ago

Which of the below elements will not likely form an ionic bond?

Nookie1986 [14]

Answer:

Explanation:

I think this is right

3 0

3 years ago

What is it called when moon is between setting and rising

miv72 [106K]

Answer:

I hope this link helps you.

Explanation:

http://astronomy.swin.edu.au/cosmos/P/Phases

4 0

3 years ago