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antoniya [11.8K]

2 years ago

9

I need help with question 14 and 15 and it’s very hard and I’m struggling with it and if you need to see the picture big then cl

ick on it and it will be big

1 answer:

erica [24]2 years ago

6 0

14. Rabbit and decomposers
15. The caterpillars will increase while the frogs decrease.

Hope this helps.

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What type of reaction occurs when you combine copper (II) chloride whit sodium hydroxide?

Natali5045456 [20]

In this case a double displacement reaction will take place.

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5. How many atoms of hydrogen are in a molecule of acetic acid (HC2H202)?

Kazeer [188]

Answer:

in acetic acid ,there are 4 hydrogen atoms

Explanation:

C H 3 C O O H

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g A mass spectrum. The peak at mass 100 has a 8% relative abundance. THe peak with mass 85 has a 40% abundance. The peak at 71 h

Sati [7]

Answer:

The peak at mass 100 with a 8% relative abundance is the molecular ion peak

Explanation:

Molecular ion peak has the highest charge to mass ratio,

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22. A piece of wood board contains approximately 6.76 X 1023 molecules of wood, C2H4920, how

Licemer1 [7]

Answer:

<h2>1.23 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

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L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{6.76 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{6.76}{6.02} \\ = 1.22923...$

We have the final answer as

<h3>1.23 moles</h3>

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How is a compound different from a mixture? *

andreyandreev [35.5K]

Answer:

a. mixtures are created through physical changes and compounds are created through chemical reactions

Explanation:

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