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Tcecarenko [31]
3 years ago
11

a mixture contains two or more substances that are physically combined and there is no electron bonding

Chemistry
1 answer:
crimeas [40]3 years ago
4 0


True.

A mixture is composed of two or more pure substance that are physically combined but are not combined chemically and thus no electrons (of their atoms) are involved.

The primary properties of a mixture include:

1. The components of a mixture are easily separated

2. The components each keep their original properties.

3. The proportion of the components may vary.

There are two main categories of mixtures:

1. Heterogeneous mixtures - substances are not evenly distributed e.g. oil and water mixture

2. Homogeneous mixtures - substances are evenly distributed throughout the mixture e.g. salt water, air. 




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What is the molarity of a solution made by dissolving 8.60 g of a solid with a
Dima020 [189]

Answer:

1.43 M

Explanation:

We'll begin by calculating the number of mole of the solid. This can be obtained as follow:

Mass of solid = 8.60 g

Molar mass of solid = 21.50 g/mol

Mole of solid =?

Mole = mass / molar mass

Mole of solid = 8.60 / 21.50

Mole of solid = 0.4 mole

Next, we shall convert 280 mL to litre (L). This can be obtained as follow:

1000 mL = 1 L

Therefore,

280 mL = 280 mL × 1 L / 1000 mL

280 mL = 0.28 L

Thus, 280 mL is equivalent to 0.28 L.

Finally, we shall determine the molarity of the solution. This can be obtained as illustrated below:

Mole of solid = 0.4 mole

Volume = 0.28 L

Molarity =?

Molarity = mole / Volume

Molarity = 0.4 / 0.28

Molarity = 1.43 M

Thus, the molarity of the solution is 1.43 M.

8 0
3 years ago
What is the method of cooking that is not easily digested​
Ivan

Answer:

deep frying,pan frying,smoking,grilling,and microwaving are some method of cooking that is not easily digested

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A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The flask is h
kakasveta [241]

Answer: Mass of the condensed vapor is 21.35 grams.

Explanation: As a gas, the Ideal Gas Law can be used to determine how many mols there are in the flask on the conditions described in question.

Temperature in K: 273 + 99.3 = 372.4K

Pressure in mmHg: P = 760.5 mmHg

Volume in L: V = 496.3.10^{-3} = 0.5 L

Universal Constant of Gases in mmHg: R = 62.36 L.mmHg.K⁻¹.mol⁻¹

PV = nRT

n = \frac{PV}{RT}

n = \frac{760.5.0.5}{62.36.372.4}

n = 0.1625

To determine the mass in grams:

n = \frac{m}{M}

m = nM

m = 0.1625.131.4

m = 21.35

On the conditions cited above, there are <u>21.35 grams</u> of the unknown condensed vapor

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3 years ago
For example, oxygen reacts to form _______ and chlorine forms ________ .
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Answer:

Chlorine reacts with oxygen to form chlorine heptoxide. ... Nitrogen reacts with oxygen to give Nitrogen monoxide.

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