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atroni [7]
2 years ago
12

Select the correct answer. When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vap

or in her collecting bottle. If the pressure in the collecting bottle is 97. 1 kilopascals and the vapor pressure of the water is 3. 2 kilopascals, what is the partial pressure of the hydrogen? A. 93. 9 kPa B. 98. 1 kPa C. 100. 3 kPa D. 104. 5 kPa.
Chemistry
1 answer:
Natali5045456 [20]2 years ago
5 0

Answer:

A. 93. 9 kPa

Explanation:

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A friend tells you that plants grow and gain mass only because of the nutrients they pull out of the soil. It this statement tru
Nutka1998 [239]
The statement that the friend made is not true. most of the mass of the plant is from carbon. the carbon comes from carbon dioxide which is used during photosynthesis. the left over carbon from photosynthesis is used to to help the plant gain mass. there is a process for this which is called cellular respiration
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4 years ago
PLEASE SOMEONE! The density of the acetic acid solution is 1.05 g/mL. Calculate the %(m/m) of the acetic acid solution (convert
tigry1 [53]

Answer:

The Percentage concentration of acetic acid = 1.39 %

Explanation:

Density of acetic acid solution = 1.05 g/mL

Volume of acetic acid solution = 0.1 L = 100 mL

From the formula, Density = mass / volume; mass = density × volume

Mass of acetic acid solution = 1.05 g/mL × 100 mL = 105 g

Molar concentration of acetic acid solution = 0.243 mol/L

Molar mass of acetic acid, CH₃COOH = (12 × 2 + 1 ×4 + 16 ×2) = 60 g/mol

From the formula, mass concentration = molar concentration × molar mass

Mass concentration of acetic acid, CH₃COOH = 0.243 mol/L × 60 g/mol = 14.58 g/L

In one liter of acetic acid solution, there are 14.58 g of acetic acid. Therefore, in 0.1 L, there will be 14.58 × 0.1 = 1.458 g of acetic acid.

Percentage concentration of acetic acid = mass of acetic acid / mass of acetic acid solution × 100%

Percentage concentration of acetic acid = (1.458 / 105) × 100% = 1.39 %

The Percentage concentration of acetic acid = 1.39 %

8 0
3 years ago
Which of the following describes the melting point of a solid?
yKpoI14uk [10]

The melting point (or, rarely, liquefaction point) of a solid is the temperature at which it changes state from solid to liquid at atmospheric pressure. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at standard pressure.

8 0
4 years ago
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(c) Draw the structure of any two aminoacids which bears a heterocyclic unit as all or part of the R side chain of the aminoacid
BaLLatris [955]

Answer:

Here I show you  tryptophan and  tyrosine

Explanation:

of the 21 amino acids, there is five amino acid that have a heterocyclic group as part of the R side chain: Histidine, proline, Phenylalanine, tyrosine, and tryptophan. Each one has a unique nature and the heterocyclic group, mainly in tyrosine, and tryptophan allows to absorb the UV light (280 nm)

5 0
4 years ago
If you put ice into a cup of coffee explain how energy will flow​
aev [14]

Explanation:

Your Ice Cube will begin to melt making your Coffee Cooler than before. ... Your Coffee might have a weird taste from freezer water. I'd rather leave my cup of Coffee cool in the air than using Ice to change the structure of content.

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4 years ago
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