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nexus9112 [7]
3 years ago
14

In clinical applications, the unit parts per million (ppm) is used to express very small concentrations of solute, where 1 ppm i

s equivalent to 1 mg of solute per 1 L of solution. Calculate the concentration in parts per million for each of the solutions. There is 25 μg of calcium in a total volume of 57 mL .

Chemistry
1 answer:
Norma-Jean [14]3 years ago
3 0

Answer: 25 μg of calcium in a total volume of 57 mL to ppm is 0.4386ppm

Explanation:

Please see the attachments below

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Answer:

P = 13.5 atm

Explanation:

Given that

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PV = nRT

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so, the pressure of the gas is equal to 13.5 atm.

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Alex Ar [27]

24 molecules of H2O are needed by the plant to produce 4 molecules of sugar.

<h2>What is photosynthesis?</h2>

The process by which plants convert carbon dioxide, water, and sunlight into oxygen and sugar-based energy is known as photosynthesis.

<h3>The photosynthesis equation is as follows:</h3>

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The following three significant activities are involved in photosynthesis:

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2. Water molecules are divided into hydrogen and oxygen and light energy is converted to chemical energy.

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Therefore, a plant needs four molecules of H2O and four molecules of CO2 to make one molecule of glucose or sugar, hence a plant needs 24 molecules of H2O and 24 molecules of CO2 to make four molecules of sugar.

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4 0
2 years ago
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MrMuchimi

Answer:

2. Co(NO3)2 + H2

Explanation:

Hello,

In this case, we are evidencing a simple displacement reaction wherein the cobalt is able displace the hydrogen to produce cobalt (II) nitrate and gaseous hydrogen as a result of cobalt's higher activity:

2 HNO_3 + Co\rightarrow Co(NO_3)_2+H_2

Therefore, answer is 2. Co(NO3)2 + H2.

Best regards.

3 0
3 years ago
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8 0
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Answer:

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