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3 years ago

How do water molecules dissolve a salt?

Chemistry

1 answer:

Artist 52 [7]3 years ago

5 0

Answer:

Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions. The amount of a substance that can dissolve in a liquid (at a particular temperature) is called the solubility of the substance.

Explanation:

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Isopentyl acetate (C7H14O2), the compound responsible for the scent of bananas, can be produced commercially. Interestingly, bee

lora16 [44]

Answer:

The answer to your question is:

a) 4.64 x 10 ¹⁵ molecules

b) 9.28 x 10 ¹⁵ atoms of O2

Explanation:

MW C7H14O2 = 84 + 14 + 32 = 130 g

a) 130 g of C7H14O2 ---------------- 1 mol of C7H14O2

1 x 10 ⁻⁶ g --------------- x

x = 7.7 x 10 ⁻⁹ mol

1 mol of C7H14O2 -------------- 6 .023 x 10 ²³ molecules

7.7 x 10⁻⁹ mol -------------- x

x = 4.64 x 10¹⁵ molecules

b) 130 g of C7H14O2 ---------------- 1 mol of C7H14O2

1 x 10⁻⁶ C7H14O2 ----------------- x

x = 7.7 x 10 ⁻⁹ mol of C7H14O2

1 mol of C7H14O2 --------------- 2 mol of O2

7.7 x 10 ⁻⁹ ---------------- x

x = 1.54 x 10⁻⁸ mol of O2

1 mol of O2 ----------------- 6.023 x 10 ²³ atoms

1.54 x 10 ⁻⁸ ---------------- x

x = 9.28 x 10 ¹⁵ atoms of O2

8 0

3 years ago

How many grams of sodium sulfide can be produced when 45.3 g Na react with 105 g S?

RoseWind [281]

The chemical reaction would be as follows:

<span>2Na + S → Na2S

We are given the amount of the reactants to be used in the reaction. We use these to calculate the amount of product. We do as follows:

45.3 g Na ( 1 mol / 22.99 g ) = 1.97 mol Na
105 g S ( 1 mol / 32.06 g ) = 3.28 mol S

The limiting reactant would be Na. We calculate as follows:

1.97 mol Na ( 1 mol Na2S / 2 mol Na ) (78.04 g / mol ) = 76.87 g Na2S produced</span>

8 0

2 years ago

In the modern periodic table, elements are arranged according to increasing ____. (1 point). . a. atomic number. b. atomic mass.

ki77a [65]

I think the correct answer from the choices listed above is option A. In the modern periodic table, elements are arranged according to increasing <span>atomic number. The atomic number represents the number of protons present for a specific atom.</span>

5 0

3 years ago

One unusual characteristic of water is its high specific heat, which means that water __. Multiple select question. warms or coo

Rus_ich [418]

The high specific heat of water means that water absorbs a great amount of heat before its temperature changes.

<h3>Specific heat capacity of water</h3>

Specific heat capacity of a substance is defined as the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C).

There are substances that has low Specific heat capacity for example metals like iron while some other substances have high specific heat capacity like water.

The high specific heat capacity seen in water means that it takes more energy to increase the temperature of water compared to other substances.

Therefore, the high specific heat of water means that water absorbs a great amount of heat before its temperature changes.

Learn more about specific heat here:

brainly.com/question/13439286

6 0

1 year ago

An atom has mass number 23 and atomic number 11.

aleksklad [387]

A): The closest orbital to the nucleus, called the 1s orbital, can hold up to two electrons. This orbital is equivalent to the innermost electron shell of the Bohr model of the atom. It is called the 1s orbital because it is spherical around the nucleus. The 1s orbital is always filled before any other orbital.

6 0

2 years ago

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