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sergiy2304 [10]
3 years ago
12

Help you’ll get 12 points

Chemistry
1 answer:
WARRIOR [948]3 years ago
5 0

Answer:

a

a

b

a

b

Explanation:

hope this is right! hope it helps :)

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10. What base unit of measurement is common to all systems?
Lera25 [3.4K]

Answer:

The SI system , also called theatrics system, is used around the world

5 0
3 years ago
I<br> Solid iron(III) oxide is produced when hot iron filings are exposed to pure<br> oxygen gas.
Sergeu [11.5K]
The unbalanced equation is:
Fe(s) + O2(g) —> Fe2O3(s)

To balance oxygens, multiply O2 by 3 and Fe2O3 by 2.

Fe(s) + 3O2(g) —> 2Fe2O3(s)

Balance your iron by multiplying Fe by 4, since you have 4 Fe in the products now.

4Fe(s) + 3O2(g) —> 2Fe2O3(s)
8 0
3 years ago
1. Classify the following matter as a pure substance or a mixture.<br> Potassium
dlinn [17]

Pure substance, basically, it’s on the periodic table.

4 0
3 years ago
The unique properties of water enable life to exist on Earth. Which of these is a property of pure water?
Lera25 [3.4K]

Answer:

Capillarity , Adhesion and cohesion . The unique property of water enable life to exist . The most important property of water is movement of materials due to water , maintenance and growth and reproduction .

Explanation:

3 0
4 years ago
When the above equation is balanced the coefficients in order are
Softa [21]
The reaction is as follow,

                   Ca(OH)₂  +  Al₂(SO₄)₃    →     CaSO₄  +  Al(OH)₃

Ca are balance on both sides, 

There are 2 Al at left side and one at right so, multiply Al(OH)₃ by 2 to balance,
So,
                   Ca(OH)₂  +  Al₂(SO₄)₃    →     CaSO₄  +  2 Al(OH)₃

Now, Ca and Al are balanced, now balance SO₄, which is 3 at left hand side and one at right hand side, so multiply CaSO₄ on right side by 3, so,

                   Ca(OH)₂  +  Al₂(SO₄)₃    →     3 CaSO₄  +  2 Al(OH)₃

Again Ca got imbalance, so multiply Ca(OH)₂ by 3 to balance Ca, So,

                   3 Ca(OH)₂  +  Al₂(SO₄)₃    →     3 CaSO₄  +  2 Al(OH)₃

The Equation is balance now with respect to every element.

Result:
          The Ratio is 3 : 1 : 3 : 2, so, Option-G is correct.
4 0
3 years ago
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