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Scorpion4ik [409]
3 years ago
8

Which of the following is the best instrument to use to prepare a solution?

Chemistry
1 answer:
Semenov [28]3 years ago
5 0
The answer to your question would be D Volumetric Flask 
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An unknown gas diffuses 1.25 times faster than CO2 gas. What is the molar mass of the unknown gas?​
hodyreva [135]

Answer:

28.16 g/mol

Explanation:

From Graham's law;

Let the rate of diffusion of gas X be 1.25

Let the rate of diffusion of CO2 be 1

Molecular mass of gas X= M

Molecular mass of CO2 = 44g/mol

1.25/1=√44/M

(1.25/1)^2 = 44/M

1.5625 = 44/M

M= 44/1.5625

M= 28.16 g/mol

4 0
3 years ago
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Its number four.Hope that helps feel free to ask me questions:)

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3 years ago
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The answer is 110., but round accordingly
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2 years ago
What is the difference between a simile and a metaphor?
Gennadij [26K]
A simile is a comparison using "as" or "like" and a metaphor is a comparison without using "like" or "as"
4 0
3 years ago
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Revision has a atoMic number of 37 and a mass number of 85. HIW many protons, neutrons and electrons does an ion of rubidium wit
EleoNora [17]

Answer: 37 protons, 48 neutrons, and 36 electrons.

Explanation: I assume "Revision" is Rubidium. It is atomic number 37, so it has 37 protons. It's atomic mass is 85, so it has an average of (85-37) = 48 neutrons. It has a charge of +1, so one electron of the original 37 has left.

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3 years ago
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