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alexira [117]
3 years ago
6

Below you will see both the elements for comparison and a star's spectrum. Your job is to identify all the elements you can dete

ct in the star's atmosphere.
Chemistry
1 answer:
Andreas93 [3]3 years ago
3 0

Answer:

hey how are you doing and I am doing find

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If 20.0 g LIOH react with excess KCl, giving a 17.0
adell [148]

The yield of lithium chloride is 1.92 grams.

Option D.

<h3><u>Explanation:</u></h3>

In this reaction, we can see that 1 mole of lithium hydroxide reacts with 1 mole of potassium chloride to produce 1 mole of lithium chloride and 1 mole of potassium hydroxide.

Molecular weight of lithium hydroxide is 24.

Molecular weight of lithium chloride is 42.5.

So 24 grams of lithium hydroxide produces 42.5 grams of lithium chloride.

So, 20 grams of lithium hydroxide produces 20 * 24 / 42.5  grams =11. 29 grams of lithium chloride.

But this is when the yield is 100%.

But yield is 17%.

So the yield is 1.92 grams of lithium chloride.

8 0
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An enzyme is a catalyst used by living things to promote and regulate chemical reactions. What is the most likely enzyme for the
dem82 [27]
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slega [8]
A) Ca(OH)2 + CO2 —> CaCO3 + H2O

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To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea from which scientist?
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What is 3 ethyl 3, 4 dimethylheptane abbreviated structural formula?<br>​
yulyashka [42]

Answer:

                    CH2- CH3

                     |

CH3 - CH2 - C        -     CH - CH2 - CH2 - CH3

                     |                 |

                    CH3           CH3

Explanation:

Heptane

CH3 - CH2 - CH2 - CH2 - CH2 - CH2 - CH3

3 ethyl 3, 4 dimethylheptane

                    CH2- CH3

                     |

CH3 - CH2 - C        -     CH - CH2 - CH2 - CH3

                     |                 |

                    CH3           CH3

6 0
3 years ago
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