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sergij07 [2.7K]
3 years ago
8

Identifying compounds Caffeine is the most widely used psychoactive drug in the world and is found in coffee beans, tea leaves,

cola nuts, and other plant products. For many plant species, caffeine serves as a natural pesticide, protecting the plant from insect damage. In our bodies, caffeine affects the rate at which brain cells fire to one another. The chemical formula for caffeine is C₈H₁₀N₄O₂. Which of the following terms correctly describe caffeine? Check all that apply. Element Isotope Matter Compound
Chemistry
1 answer:
Marina CMI [18]3 years ago
4 0

Answer:

Matter

Compound

Explanation:

Caffeine is NOT an Element, because it is formed by different elements (C, H, N, and O).

Caffeine is NOT an Isotope, because this only applies to elements with the same atomic number but different mass number.

Caffeine is Matter because it has mass and occupies space by having volume.

Caffeine is a Compound because it has a formula with a <em>definite constant composition</em> of different elements.

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During combustion, methane yields carbon dioxide and water. The unbalanced equation for this reaction is:CH4(g)+O2(g) → CO2(g)+
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CH₄(g)  +  2O₂(g) → CO₂(g)  +  2H₂O(l)

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Explanation:

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2 C

8 H

8 O

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Mole ratios for the balanced equation be:

Mole ratios for the balanced equation be:

1:2, 2:1, 1:1, 1:2, 2:2  - We should compare each compound

1 mol methane → 2 mole of oxygen

2 mole of oxygen → 1 mol of methane

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2 mole of water → 2 mole of oxygen (the same as opposite)

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What variable represents specific heat in the equation Q = mcAT?
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Answer: A. The variable c

============================================

Explanation:

Q = heat transferred

m = mass

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