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2 years ago

Marking brainliest hurry !

Chemistry

2 answers:

jek_recluse [69]2 years ago

7 0

Answer:

B. A body at rest will stay at rest until it is acted upon by another object

Explanation:

Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Kitty [74]2 years ago

5 0

Answer:

The correct answer is b.

Explanation:

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How many molecules of oxygen are needed to make 3.5 oxygens of water?

max2010maxim [7]

Answer:

57.6g

Explanation:

So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.

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2 years ago

Which of the following best describes a mixture in which ionic compounds are dissociated in solution?

Ierofanga [76]

Ion solution is correct. hope it helps

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3 years ago

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The isomerization of methylisonitrile to acetonitrile (CH3NC(g) ???? CH3CN) is first order in CH3NC. The rate constant for the r

Hoochie [10]

Answer:

The half life is $H_{1/2}= 7333.3sec$

Explanation:

The half life of a first order reaction is mathematically represented as

$H_{1/2} = \frac{0.693}{Rate Constant }$

Substituting $9.45 * 10^{-5}s^{-1}$ for the rate constant

$H_{1/2} = \frac{0.693}{9.45*10^{-5}}$

$H_{1/2}= 7333.3sec$

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2 years ago

Antibiotics do not reduce the number of helpful and harmful bacteria in the microbiome.

stira [4]

Answer:

false; the purpose of antibiotics is to kill bacteria

Explanation:

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3 years ago

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A chemistry student is given 250.0 mL of clear aqueous solution at 42 C. He is told an unknown amount of a certain compound X is

lara [203]

Answer:

Explanation:

The solubility of a solid in water refers to the amount of that solid that dissolves in water.

It is not possible to calculate the solubility of the solid because the student threw away the first precipitate that formed. We already have the volume of water, but having lost some mass of precipitate, it has become impossible to accurately determine the solubility.

Hence the answer provided above.

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2 years ago