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trapecia [35]
3 years ago
12

1 CHEM QUESTION PLEASE HELP What is meant by the phrase, “conservation of mass”?

Chemistry
1 answer:
Pavel [41]3 years ago
5 0
It is a principle that states that mass cannot be loss or gained in a chemical reaction.
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1. There are how many mol of oxygen in 3.5 mol of caffeine.
inysia [295]

Answer:

7 mol

Explanation:

Caffeine molecular formula C8H10N4O2. It has 2 atoms of oxygen.

                          C8H10N4O2         - 2O

                           1 mol                        2 mol

                           3.5 mol                    x mol

x = 3.5*2/1 = 7 mol

3 0
3 years ago
If a solution turns litmus paper turns red, which type of solution is it?
kari74 [83]

It is a base due to the color change!

Hope this helps!

Mark me brainliest please...

5 0
3 years ago
Is a theory testable, yes or no?
Paraphin [41]
Yes because a theory is based on results and the results are part of the experiment and it being tested. You have to test the experiment and get results so yes a theory is testable.
5 0
3 years ago
An ionic bond is an _________ attraction between ions.
BabaBlast [244]

Answer:

An ionic bond is an attraction between ions of opposite charge in an ionic compound.

8 0
2 years ago
The reaction CO2(g) → C(s) + O2(g) is a decomposition reaction.<br><br> True<br> False
Lyrx [107]

  The reaction CO₂(g)  → C(s) +O₂(g)  is  a decomposition  reaction is true

Explanation

 A Decomposition reaction is a reaction in which involve breaking down  a compound into   two or more  simpler  substances.

 The reaction above is a decomposition reaction since CO₂    molecule is broken down  into C (an  element) and O₂  (a  molecule).

4 0
3 years ago
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