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3 years ago

Are these right? Please help

Chemistry

1 answer:

kotegsom [21]3 years ago

4 0

Explanation:

Question - 14

Answer - A vapour is gas state of matter.

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Question - 13

Answer - Heat is not an example of matter.

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Question - 12

Answer - Compound

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Question - 11

Answer - Chemical Reaction

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Question - 10

Answer - Element

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Question - 6

Answer - Reactant

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Question - 5

Answer - Product

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How many moles are equal to 4.15x10^23 molecules of carbon monoxide?

Rudiy27

To be able to determine the number of moles that a certain number of molecules comprises, we simply divide the number of molecules by the Avogadro's number which is equal to 6.022 x 10^23.

n = M/A

where n is the number of moles, M is the number of molecules, and A is Avogadro's number. Substituting the known values,

n = (4.15 x 10^23 molecules)/(6.022 x 10^23 molecules/mol)

Simplifying,

n = 0.689 moles

<em>Answer: 0.689 moles</em>

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3 years ago

Read 2 more answers

It took 4.5 minutes for 1.0 l helium to effuse through a porous barrier. how long will it take for 1.0 l cl2 gas to effuse under

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When The rate of effusion is inversely proportional to the √molar mass of the substance.
and we have R(He) = 1L / 4.5 min so,
R(He)/R(Cl2) = (molar mass of Cl2/ molar mass of He)^0.5
and when we have the molar mass of Cl2 = 70.9 & the molar mass of He = 4
so by substitution:
(1L/4.5 min)/ R(Cl2) = (70.9 / 4)^0.5
(1L/4.5 min) / R(Cl2) = 4.21
∴R(Cl2) = (1L/4.5 min) / 4.21 = 1L/ (4.5*4.21)min = 1 L / 18.945 min
∴Cl2 will take 18.945 min for 1 L to effuse under identical conditions

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4 years ago

What is a by-product of a nuclear power plant?

Mariana [72]

Answer:

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3 years ago

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Explanation:

some teachers just like to explain how a chemical reaction is anything involved with chemicals and any other process is just explained as a physical process

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4 years ago

What would carbon and chlorine form if they bond

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That is a bond between carbon and chlorine, as in chloro methane:

H3C-cl
i hope i helped you❤

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4 years ago