Answer:
3.75 g.
Explanation:
<em>mass percent is the ratio of the mass of the solute to the mass of the solution multiplied by 100.</em>
<em />
<em>mass % = (mass of solute/mass of solution) x 100.</em>
<em></em>
mass of calcium nitrite = ??? g,
mass of the solution = 25.0 g.
∴ mass % = (mass of solute/mass of solution) x 100
<em></em>
<em>∴ mass of solute (calcium nitrite) = (mass %)(mass of solution)/100</em> = (15.0 %)(25.0 g)/100 = <em>3.75 g.</em>
The answer is 16.75 it rounds to 17 Hope this helps! ;D
Answer:
the number of electrons is 13 and neutrons is 14
Density = mass/volume = 50/6.36 = 7.86 g/cm^3
Hope this helps!
Then it is a pure substance, or an element.
