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Norma-Jean [14]
2 years ago
9

Study the figures below which illustrate the steps in the following chemical reaction:

Chemistry
1 answer:
Tanya [424]2 years ago
7 0

Answer:

Hello - this is Mrs. Gussman, your chemistry teacher.  I wrote this exam question and posting it online is a violation of the academic integrity policy.  Remove this post immediately.

Explanation:

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Chemicals are classified as health hazards when they pose which of the following hazardous effects?
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poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.

Explanation:

many hazardous chemicals are also classified as dangerous goods.

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2 years ago
If the volume of an irregular sound is determined by the water displacement technique, its volume will be equal to
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Adding vinegar to baking soda will cause a chemical reaction. Which of these will speed up the reaction?
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2 years ago
A sample of pure lithium chloride contains 16% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbon
Anna35 [415]

Answer:

Percentage lithium by mass in Lithium carbonate sample = 19.0%

Explanation:

Atomic mass of lithium = 7.0 g; atomic mass of Chlorine = 35.5 g; atomic mass of carbon = 12.0 g; atomic mass of oxygen = 16.0 g

Molar mass of lithium chloride, LiCl = 7 + 35.5 = 42.5 g

Percentage by mass of lithium in LiCl = (7/42.5) * 100% = 16.4 % aproximately 16%

Molar mass of lithium carbonate, Li₂CO₃ = 7 * 2 + 12 + 16 * 3 =74.0 g

Percentage by mass of lithium in Li₂CO₃ = (14/74) * 100% = 18.9 % approximately 19%

Mass of Lithium carbonate sample = 2 * 42.5 = 85.0 g

mass of lithium in 85.0 g Li₂CO₃ = 19% * 85.0 g = 16.15 g

Percentage by mass of lithium in 85.0 g Li₂CO₃ = (16.15/85.0) * 100 % = 19.0%

Percentage lithium by mass in Lithium carbonate sample = 19.0%

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