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defon
3 years ago
7

The mass of an atom is determined by the number of protons the element has. The more protons, the heavier the element.

Chemistry
1 answer:
alekssr [168]3 years ago
3 0

Answer:

a i think true.

Explanation:

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What is the mass number of lithium isotope that consists of 3 protons, 4 neutron and 3 electrons
sweet-ann [11.9K]

Answer:

7. ok

please mark me brainlistb

6 0
3 years ago
The compound 3-methylpentane is an example of
Cerrena [4.2K]

Answer:

A) An Alkaline

Explanation:

An alkane that is pentane which is substituted by a methyl group at position 3. It is used as a solvent in organic synthesis, as a lubricant and as a raw material for producing carbon black.

3 0
2 years ago
2.(04.01 LC)
Mila [183]

Answer:

2KClO3 —> 2KCl + 3O2

The coefficients are 2, 2, 3

Explanation:

From the question given above, we obtained the following equation:

KClO3 —> 2KCl + 3O2

The above equation can be balance as follow:

There are 2 atoms of K on the right side and 1 atom on the left side. It can be balance by putting 2 in front of KClO3 as shown below:

2KClO3 —> 2KCl + 3O2

Now, the equation is balanced.

Thus, the coefficients are 2, 2, 3

8 0
2 years ago
37.9 grams of an unknown substance undergoes a temperature increase of
jenyasd209 [6]

Answer:

1.023 J / g °C

Explanation:

m = 37.9 grams

ΔT = 25.0*C

H = 969 J

c = ?

The equation relating these equation is;

H = mcΔT

making c subject of formulae;

c = H / mΔT

c = 969 J / (37.9 g * 25.0*C)

Upon solving;

c = 1.023 J / g °C

4 0
3 years ago
Considering particles at the subatomic level, carrying out this experiment would help to identify the metals given that: Ca has
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Answer:

we can do it again and again and again and again and again and again

4 0
3 years ago
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