What could J. J. Thomson conclude from his experiments? Atoms are mostly empty space. Most of the mass of the atom is concentrat
2 answers:
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<u>Answer:</u> The density of NaCl solution is 3.930 g/mL
<u>Explanation:</u>
We are given:
Mass of cylinder, = 21.577 g
Mass of NaCl and cylinder combined, M = 39.664 g
Mass of NaCl, =
To calculate density of a substance, we use the equation:
We are given:
Mass of NaCl = 18.087 g
Volume of NaCl solution = 4.602 mL
Putting values in above equation, we get:
Hence, the density of NaCl solution is 3.930 g/mL
<u>Answer:</u>
<u>For a:</u> The balanced equation is
<u>For c:</u> The balanced equation is
<u>Explanation:</u>
A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.
- <u>For (a):</u>
The given unbalanced equation follows:
To balance the equation, we must balance the atoms by adding 2 infront of both and
and 3 in front of
For the balanced chemical equation:
- <u>For (b):</u>
The given balanced equation follows:
The given equation is already balanced.
- <u>For (c):</u>
The given unbalanced equation follows:
To balance the equation, we must balance the atoms by adding 2 infront of
For the balanced chemical equation:
- <u>For (d):</u>
The given balanced equation follows:
The given equation is already balanced.