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3 years ago

A/an bonds allows metals to conduct electricity

1 answer:

5 0

If I understand you correctly, you should fill the gap and decide which kind og bonds allows metals to conduct electricity. If so, without any doubt I can say that the metalic bonds allows metals to conduct electricity. I'm pretty sure it will help you! Regards.

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How many neutrons does element X have if its atomic number is 22 and its mass number is 99?

Scrat [10]

77.

To find the answer u have to subtract the atomic mass from the atomic number.

5 0

4 years ago

How are ionic bonds formed?

lisov135 [29]

Answer:

Explanation:

It occurs when the outermost electrons are permanently transferred to another atom.

7 0

3 years ago

A solid mixture consists of 47.6g of KNO3 (potassium nitrate) and 8.4g of K2SO4 (potassium sulfate). The mixture is added to 130

IgorLugansk [536]

Answer: No crystals of potassium sulfate will be seen at 0°C for the given amount.

Explanation:

We are given:

Mass of potassium nitrate = 47.6 g

Mass of potassium sulfate = 8.4 g

Mass of water = 130. g

Solubility of potassium sulfate in water at 0°C = 7.4 g/100 g

This means that 7.4 grams of potassium sulfate is soluble in 100 grams of water

Applying unitary method:

In 100 grams of water, the amount of potassium sulfate dissolved is 7.4 grams

So, in 130 grams of water, the amount of potassium sulfate dissolved will be $\frac{7.4}{100}\times 130=9.62g$

As, the soluble amount is greater than the given amount of potassium sulfate

This means that, all of potassium sulfate will be dissolved.

Hence, no crystals of potassium sulfate will be seen at 0°C for the given amount.

7 0

3 years ago

If an airplane travles 4000 miles south in 8 hours what is its velocity

Agata [3.3K]

Answer:

Velocity = Distance Covered÷Time Taken

Velocity = 4000÷8

V = 500

4 0

3 years ago

The enthalpy of vaporization for water is 40.67 kJ/mol and the enthalpy of fusion for water is

S_A_V [24]

Answer:

$\Delta H_{dep}=-46.68kJ/mol$

Explanation:

Hello!

In this case, since vaporization is the processes by which a liquid goes to the gas phase, fusion by which a solid goes to liquid and deposition by which a gas goes to solid; we infer that the following set up relates the enthalpies associated to each process:

$\Delta H_{fus}+\Delta H_{vap}=-\Delta H_{dep}$

Because deposition goes from a state with more energy to a state with less energy, therefore it is negative; in such a way, by plugging in we obtain:

$\Delta H_{dep}=-(\Delta H_{fus}+\Delta H_{vap})\\\\\Delta H_{dep}=-(6.01kJ/mol+40.67kJ/mol)\\\\\Delta H_{dep}=-46.68kJ/mol$

Best regards!

6 0

3 years ago