Which is a chemical property of copper?

1 answer:

7 0

The answer should be B, it reacts in air to form a green layer.

Chemical properties means that how the substance that reacts with other substance to produce new substances. Usually it cannot be measured or observed just with the substance itself.

From all the options above, only B is a reaction. The green layer formed is a new substance produced by copper and air. It involves a chemical change.

Other options like boiling points or state of matter, these are physical properties. They do not require it to react to other substances and the can be measured and observed easily.

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How many moles of NaCl are present in 2.50 L of a 0.070 M solution?

posledela

Given :

Volume of NaCl solution 2.5 L .

Molarity of NaCl solution is 0.070 M .

To Find :

How many moles are present in the solution.

Solution :

Let, n be the number of moles.

We know, molarity is given by :

$M = \dfrac{n}{V(in\ L)}$

So,

$n = M \times V\\\\n = 0.070\times 2.5 \\\\n = 0.175\ moles$

Therefore, number of moles of NaCl is 0.175 moles.

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Hence, the correct answer is "Storage battery or cell".

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3 years ago

What is it called when a gas is converted into a liquid

alex41 [277]

Your answer is probably
Vaporization point

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3 years ago

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ioda

Answer: