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3 years ago

Explain why the metals conduct electricity

Chemistry

1 answer:

Whitepunk [10]3 years ago

5 0

Answer:

Metals conduct electricity because the electrons inside the metal are relatively free to move. So when electricity is pass through metals, electrons carry electricity and spread it all over the metal. The mobility of electrons is the reason why metals conduct electricity.

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3 years ago

At STP, how many molecules of nitrogen gas are in 22.4 L?

eduard

At STP one mole of gas takes up 22.4L which means that the answer is B since there is 6.02×10²³ molecules in one mole of a substance.

I hope this helps. Let me know if anything is unclear.

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4 years ago

Describe in detail how to prepare 500.0 mL of a 2.5 M calcium chloride solution. Calcium chloride is purchased as a solid. TO pi

antoniya [11.8K]

Answer:

In a volumetric flask of marking 500.0 mL add 138.75 grams of calcium chloride and add small amount of water to dissolve solute completely. After the solute gets completely soluble add more water up till the mark of 500 ml.

Explanation:

Concentration of calcium chloride = 2.5 M

Volume of the solution = 500.0 ml = 0.5000 L

Moles of calcium chloride = n

$c=\frac{n}{V(L)}$

n = moles of solute

c = concentration of solution

V = volume of the solution in L

$2.5 M=\frac{n}{0.5000 L}$

$n=2.5 M\times 0.5000 L = 1.2500 mol$

$n=\frac{\text{Mass of calcium chloride}}{\text{Molar mass of calcium chloride}}$

$1.2500 mol=\frac{\text{Mass of calcium chloride}}{111 g/mol}$

Mass of calcium chloride = 111 g/mol × 1.2500 mol = 138.75 g

In a volumetric flask of marking 500.0 mL add 138.75 grams of calcium chloride and add small amount of water to dissolve solute completely. After the the solute gets completely soluble add more water up till the mark of 500 ml.

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3 years ago

Which process melts an ore to separate useful metals from the rest of the elements in the ore? smelting, mining, prospecting, al

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The <span>process melts an ore to separate useful metals from the rest of the elements in the ore is called smelting. The ore is heated beyond its melting point to extract the metal with the help of oxidizing agents such as air or reducing agents such as coke. </span>

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3 years ago