HNO3+NaOH ----> H2O
H⁺ +NO3⁻+Na⁺+OH⁻ ---> Na⁺ +NO3⁻ +H2O
H⁺ (aq)+OH⁻(aq)----> H2O(l)
The density of the sample is:
Density = mass / volume
Density = 9.85 / 0.675
Density = 14.6 g/cm³
If the sample has 95% gold, and 5% silver, its density should be:
0.95 x 19.3 + 0.05 x 10.5
Theoretical density = 18.9 g/cm³
The difference in theoretical and actual densities is very large, making it likely that the jeweler was not telling the truth.
Yes, and no. We all should know by know we do need the sun to survive, but we also need for energy is oxygen and the food we eat.
Answer:
I think its carbon because of all the chemicals being used in that air.
D. A metal such as copper, because its atom have very mobile electrons - A-p-e-x verified!
<u>Have a Great Day!</u>