3 years ago

Why is photosynthesis an example of chemical change, and why is it classified as endothermic?

1 answer:

3 0

Answer:

It is an example of chemical reaction because carbon dioxide and water are converted into glucose and oxygen. If that makes any sense. and it is classified as endothermic because it requires the input of energy in the form of solar energy.

Explanation:

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How many moles of sucrose are in 5.25x1029 sucrose molecules? (in scientific notation)

Lorico [155]

Answer:

8.72 × 10^5 moles

Explanation:

To find the number of moles in 5.25 x 10^29 molecules of sucrose, we divide the number of molecules by Avagadro constant (6.02 × 10²³ molecules). That is;

no. of moles = no. of molecules ÷ 6.02 × 10²³ molecules

In this case of sucrose, no of moles contained is as follows;

5.25 × 10^29 ÷ 6.02 × 10²³

5.25/6.02 × 10^ (29-23)

0.872 × 10^6

= 8.72 × 10^5 moles

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2 years ago

Is the following a physical or chemical change?

tester [92]

Answer:

chemical change

Explanation:

electrolysis process by which electric current is passed through a substance to effect a chemical change.

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2 years ago

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Varvara68 [4.7K]

If you type in the letters (uppercase and lowercase matters) into google it will give you the answers

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2 years ago

Is copper ii sulphate (solution) blue or green?

slavikrds [6]

Copper II sulfate solution is blue.

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2 years ago

Hydrogen peroxide can decompose to water and oxygen by the following reaction

mestny [16]

To begin calculating, there is one thing you need to remember : $1 mole of H2O2=34.0148 g$
Then we have $5.00g of H2O2=5/34.0148=0.146995$
As you know decomposition of 2moles now has prodused 196kj
So, q is made due $0.146995 moles of H2O2$ $=(-196/2)*0.146995=-14.40551Kj$
I'm sure it will help.

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2 years ago