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2 years ago

Four properties of water are listed.

Chemistry

2 answers:

Andrei [34K]2 years ago

6 0

Answer: 1 and 3

Explanation:

Physical properties refer to those properties of a substance that doesn't involve a chemical change or chemical reaction. They are physically observable properties of a substance. For example, we do not need any chemical reaction to observe the fact that water is odourless in its pure state. Also, we only need a thermometer and no chemical reaction to observe it's boiling point. Physical observation tells us that the liquid turns into vapour at that temperature. This is confirmed by observing the loss in volume of the liquid

kobusy [5.1K]2 years ago

4 0

Answer:

It reacts with metals to form metal hydroxide and hydrogen gas. it s an chemical property and it decomposes to H2 and O2 is also another chemical property property. because in these reaction H2O has changed to something else hence are called chemical property.

Explanation:

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A scientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘C. What is the molar mass of this gas?

Ivan

Answer:

The molar mass of the gas is 36.25 g/mol.

Explanation:

To solve this problem, we can use the mathematical relation:

ν = $\sqrt{3RT/M}$

Where, ν is the speed of light in a gas (ν = 449 m/s),

R is the universal gas constant (R = 8.314 J/mol.K),

T is the temperature of the gas in Kelvin (T = 20 °C + 273 = 293 K),

M is the molar mass of the gas in (Kg/mol).

ν = $\sqrt{3RT/M}$

(449 m/s) = √ (3(8.314 J/mol.K) (293 K) / M,

by squaring the two sides:

(449 m/s)² = (3 (8.314 J/mol.K) (293 K)) / M,

∴ M = (3 (8.314 J/mol.K) (293 K) / (449 m/s)² = 7308.006 / 201601 = 0.03625 Kg/mol.

∴ The molar mass of the gas is 36.25 g/mol.

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2 years ago

Place each statement in the column of the particle that it best describes. Refer To Photo

MrRa [10]

The options are labelled as:

1 2

3 4

5 6

7 8

Protons: 1, 5, 7

Neutrons: 2, 8

Electron: 3, 4, 6

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3 years ago

Mashcka [7]

Answer:

It is 34

Explanation:

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2 years ago

Identify the element in C6H12O6 that allows it to be classified as an organic compound.

LenaWriter [7]

Answer:

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Explanation:

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3 years ago

What advice would you give to a person who handles hydrogen and oxygen in their workplace?I think I have an idea of what advice

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Make a consistent control of weight diminishing valves giving gas.

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2 years ago