2 years ago

Which postulate of daltons atomic model was later changed and why

Chemistry

1 answer:

arlik [135]2 years ago

3 0

atom is indivisible particle and can be subdivided into smaller particles

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What is the density of a sample of a substance with a volume of 120ml<br> and a mass of 90g?

tigry1 [53]

Answer:

<h3>The answer is 0.75 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 90 g

volume = 120 mL

We have

$density = \frac{90}{120} = \frac{9}{12} = \frac{3}{4} \\$

We have the final answer as

Hope this helps you

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3 years ago

What is the name of the polyatomic in MgSO4?

blsea [12.9K]

Answer:

Magnesium Sulfate

Explanation:

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3 years ago

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How many formula units of CaO are in 32.7 g of CaO?

max2010maxim [7]

Answer:

3.51× 10²³ formula units

Explanation:

Given data:

Mass of CaO = 32.7 g

Number of formula units = ?

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/molar mass

Number of moles = 32.7 g/ 56.1 g/mol

Number of moles = 0.583 mol

Number of formula units:

1 mole = 6.022 × 10²³ formula units

0.583 mol × 6.022 × 10²³ formula units / 1 mol

3.51× 10²³ formula units

The number 6.022 × 10²³ is called Avogadro number.

7 0

3 years ago

Draw the structure of the fat or oil that would result when a glycerol molecule is

charle [14.2K]

Glycerol will react with 3 butanoic acid molecule to produce glyceryl tributyrate.

Explanation:

You may find the chemical reaction and the structure of molecules in the attached picture.

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triglyceride

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3 years ago

Two liquids – one polar, one nonpolar – have the same molar mass. which one has the higher boiling point?

Anton [14]

Polar will always have the higher boiling point because they have strong van der waal forces

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4 years ago