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omeli [17]
4 years ago
10

The greenish color of plant cells comes from

Chemistry
1 answer:
umka2103 [35]4 years ago
7 0
B-chloroplasts is the answer
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C, h, o, n, p and s make up > 90% of all organic compounds. t or f?
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True is does make up 90 percent
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If 21.8 g of NO and 13.8 g of O2 are used to form NO2, how many
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Answer:

Explanation:

1 . Write the chemical equation.

2 . Calculate the moles of product from the first reactant.

3 . Calculate the moles of product from the second reactant.

4 . Identify the limiting reactant and the excess reactant.

5 . Calculate the mass of excess reactant used up.

6 . Calculate the mass of unused excess reactant.

7 . Calculate the mass of limiting reactant needed to react with the 8 .  unused excess reactant.

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3 years ago
Methane and chlorine react to form four products: CH3Cl, CH2Cl2, CHCl3, and CCl4. At a particular temperature and pressure, 38.4
Anastasy [175]

Answer:

How many grams of CCL4 were formed? 116.9 g

How many grams of Cl2 reacted with the CH4? 243.8 g

Explanation:

First we need to know the molar mass for every element or compound in the reaction:

M_{CH_{4}}=16 g/mol\\M_{CH_{3}Cl}=50.49g/mol\\M_{CH_{2}Cl_{2}}=84.93g/mol\\M_{CHCl_{3}}=119.38g/mol\\M_{CCl_{4}}=153.82g/mol

Now we proceed to calculate the amount of moles produced, per product:

n_{CH_{4}}=2.4\\n_{CH_{3}Cl}=0.18\\n_{CH_{2}Cl_{2}}=0.55\\n_{CHCl_{3}}=0.91\\n_{CCl_{4}}=n_{CH_{4}}-(n_{CH_{3}Cl}+n_{CH_{2}Cl_{2}}+n_{CHCl_{3}})\\n_{CCl_{4}}=0.76mol\\m_{CCl_{4}}=n_{CCl_{4}}*M_{CCl_{4}}\\m_{CCl_{4}}=116.9g

To calculate the mass of chlorine we just need to make a mass balance:

m_{CH_{4}}+m_{Cl_{2}}=m_{CH_{3}Cl}+m_{CH_{2}Cl_{2}}+m_{CHCl_{3}}+m_{CCl_{4}}\\m_{Cl_{2}}=m_{CH_{3}Cl}+m_{CH_{2}Cl_{2}}+m_{CHCl_{3}}+m_{CCl_{4}}-m_{CH_{4}}\\m_{Cl_{2}}=243.8g

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3 years ago
Which of the following measurements would be different for the same object on the earth and on the moon?
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The gravity takes place in the objects
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3 years ago
Which statements are true of solutions? They contain solutes and solvents. They always have only one solute per solvent. Their p
melamori03 [73]

Explanation:

When two or more substances are mixed together in such a way that their particles are evenly distributed throughout the mixture then it is known as a solution.

Basically, a solution is a homogeneous mixture which can be present in any phase.

A solution contains both solute and solvent.

A colloid is defined as a substance in which solute particles are microscopically distributed throughout the solvent. In a colloid both solvent and solute are present in liquid phase.

Hence, a solution can be easily distinguished from colloids.

Therefore, we can conclude that following statements about solutions are true:

  • They contain solutes and solvents.
  • Their particles must be evenly distributed.
  • They may contain solid, liquid, and gas simultaneously.
  • They are always easy to distinguish from colloids.
  • They are homogeneous matter.
5 0
4 years ago
Read 2 more answers
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