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Mama L [17]
3 years ago
10

When reactants are not used to make new substances, are they destroyed?

Chemistry
1 answer:
valkas [14]3 years ago
3 0

In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

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Question
guapka [62]

Answer:

677

Explanation:

took the test

it said that it was wrong but then it also said the total bond energy of the reactants is 677 kJ/mol. the correct one was 854, i guess.

8 0
3 years ago
Read 2 more answers
What is the mass of 8.7 moles of H2O2
solong [7]

Answer:

34.0147 g/mol i think wo

4 0
3 years ago
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(a) starting with solid sucrose, c12h22o11, describe how you would prepare 250 ml of a 0.250 m sucrose solution. (b) de- scribe
Anna007 [38]

a. We first calculate the moles of sucrose needed

moles sucrose = 0.250 M * 0.25 L

moles sucrose = 0.0625 mol

 

The molar mass of sucrose 342.3 g/mol, so the mass of sucrose needed is:

mass sucrose = 0.0625 mol * 342.3 g/mol

mass sucrose = 21.4 grams

 

So simply dissolved about 21.4 grams of sucrose in 250 mL solution.

 

b. We use the formula:

M1 V1 = M2 V2

1.50 M * V1 = 0.100 M * 0.350 L

V1 = 0.0233 L = 23.3 mL

 

So simply take 23.3 mL of solution from 1.50 M then dilute it with water until 350 mL to make 0.100 M.

5 0
4 years ago
What phase is not part of mitosis and is where the cells spends most of its time
andriy [413]

Answer:

interphase

Explanation:

they spend most time in interphase

5 0
3 years ago
Consider again the reaction for photosynthesis: 6CO2 + 6H2O → C6H12O6 + 6O2. Select the correct mole ratio to complete the calcu
Dmitry_Shevchenko [17]

Explanation:

Photosynthesis is the process whereby green plants uses light energy to manufacture food using carbon dioxide and water to produce energy rich glucose and oxygen gas as a bye - product.

 The equation is given below:

             6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

In the reaction above, the number of moles are:

               6CO₂     +     6H₂O    →       C₆H₁₂O₆    +      6O₂

                   6                   6                         1                    6

The reaction shows that 6 moles of carbon dioxide combines with 6 moles of water to give one mole of glucose and 6 moles of oxygen gas;

We can say that:

  To produce 1 mole of glucose, we need 6 moles of carbon dioxide

                       1 mole of glucose, we need 6 moles of water

                        6 moles of oxygen gas we need 6 moles of carbon dioxide

                        6 moles of oxygen gas we need 6 moles of water molecules

learn more:

Photosynthesis brainly.com/question/2761166

#learnwithBrainly

6 0
3 years ago
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