Which material is a mixture? 1. water 2. air 3. methane 4. magnesium

2 answers:

4 0

Water is H2O, meaning that it is bonded together which means it is not a mixture. A mixture is two substances mixed together but not bonded together. Methane is CH4, so again it is bonded together so again it is not a mixture. Magnesium is just an element so there is nothing mixed in it since it is a pure substance. So the answer is Air since it is a mixture of gases.

skelet666 [1.2K]3 years ago

3 0

Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.

You might be interested in

What is the percentage sodium in sodium oxide

Alekssandra [29.7K]

<span>
Sodium Oxide= Na2O
The formula mass of Na2O is (2x23) + 16 = 62g/mol

% Na= (46/62) x 100 = 74%
% O= (16/62) x 100 = 26%</span><span>
</span>

4 0

2 years ago

Read 2 more answers

Find the final product for: Li + Br and show work.

miskamm [114]

Lithium is atomic number 3, so it has valency 1

While, Bromine is atomic number 35, and has valency 1

Lithium has an extra electron while Bromine need an electron, since they both need and have one electron, the form

LiBr (Lithium Bromide) where Li is +ve charged and Br is -ve charged

Happy to help :)

7 0

2 years ago

What is the formula for nitrogen monoxide?

WINSTONCH [101]

The answer is NO.

Mono- means 1, so monoxide would indicate that there is 1 oxygen.

The N is double bonded to the O:

N=O

And has an unpaired set of electrons

4 0

2 years ago

This shows the unequal heating of land and water by the sun's rays. The pattern seen here creates a _______________ current and

galina1969 [7]

I think the answer is c

6 0

2 years ago

Read 2 more answers

What are two ways to change the solubility of a solute?

Anna11 [10]

Answer:

Change the temperature and pressure

Explanation:

In case we are analyzing the solubility of a salt in some solvent, raising the temperature would increase the solubility of a salt generally. In contrast, at lower temperatures the solubility of ionic salts would decrease.

Now, another variation of this scenario might be solubility of gases. According to Henry's Law, $S = k_Hp$ , meaning that the solubility of a gas is directly proportional to its partial pressure. Therefore, the greater the pressure, the greater the solubility of a gas.

4 0

3 years ago