For Brainliest, Hey can someone please help if you do all of them you get Brainlisest

Chemistry

2 answers:

expeople1 [14]3 years ago

8 0

4. j.

5. There are eight electrons in the cloud around the nucleus, b

6. The identity of an element is determined by its atomic number. This is the number of protons it has, as well as the number of electrons, f

7.A proton is a subatomic particle, symbol p or p+, with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron, c

Mariulka [41]3 years ago

4 0

4. F
5.D
6.F
7.A ......
......

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Which best describes the geologic time scale? It explains why events happen throughout Earth’s history. It presents the correct

sertanlavr [38]

Answer:

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3 years ago

A gas is produced when 25 g of substance X is mixed into 60 g of solution Z in a beaker. The mass of the solution in the beaker

Zepler [3.9K]

mass of the gas = 10 g

<h3>Further explanation</h3>

<em>The law of conservation of mass :</em>

<em>In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.</em>

Reaction

$\tt X+Z\rightarrow gas+solution$