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user100 [1]
3 years ago
11

Why do you think that different substances have different melting and boiling pointeds

Chemistry
1 answer:
Sergio [31]3 years ago
5 0


The boiling point and melting point of  substances is determined by their molecular weight and the cohesion (stickiness) of the individual molecules in the substance.

Based on the cohesive molecule - molecule interactions of a substance, it may have either a high melting and boiling point or vice versa. The stronger the cohesive interactions the more the heat required for the substance's transition into liquid and gas state.

These intermolecular forces include hydrogen bonding , ionic  bonding, dipole dipole, and Van Der Waals dispersion forces.

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a 4.4 g sample of gas occupies 2.24 l of volume at stp. without thinking too hard, what is the mw of the gas, and name two gases
garri49 [273]

As a result, gas's molecular weight is 44g/mol. It is the gas's (Carbon dioxide) molecular weight.

What is Molecular Weight?

The total atomic weights of the atoms in a molecule are measured by its molecular weight. To calculate stoichiometry in chemical equations and reactions, chemists employ molecular weight. M.W. or MW are two frequent abbreviations for molecular weight. Atomic mass units (amu), Daltons, or a unitless expression can be used to indicate molecular weight (Da).

The mass of the isotope carbon-12, which is given a value of 12 amu, serves as the reference point for defining both atomic weight and molecular weight. Because there are many carbon isotopes, the atomic weight of carbon is not exactly 12.

A mole of any gas at STP takes up a volume of 22.4l

at STP, a gas fills a volume of 2.24l

Calculating the quantity of moles of gas in step two

Consequently, the amount of gas in moles

= 0.1 moles

This is equivalent to carbon dioxide's molecular weight.

=44g/mol

As a result, gas's molecular weight is 44g/mol. It is the gas's (Carbon dioxide) molecular weight.

Learn more about Molecular Weight from given link

brainly.com/question/837939

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7 0
1 year ago
Which lists the waves in order of frequency, from highest to lowest?
serg [7]
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6 0
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Read 2 more answers
How many moles are in 6.8 x 10^23 molecules of NaOH? (show work please)
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Answer:

1.13moles

Explanation:

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The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel. (:

8 0
4 years ago
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