Explanation:
In normal atmosphere, analytical reagents may absorb water molecules that may affect the results of chemical reactions. So, in order to get accurate results from these analytical regents, they must be stored in a dessicated atmosphere or heated before being used so that the water molecules must dry away.
Answer:
- rows and columns
- period
- atomic orbitals
4.similar properties
5.electrons are very reactive
a light bulb is the example of chemical energy
Answer:
0.0922 J/g°C
Explanation:
Use the formula Q=mc(delta)T. My teacher called it "M"cat to help my class remember it. Q-energy(560J) M-mass(130.6g) c(specific heat) is what you are solving for and delta T is the change in temperature(66.5-20.0). Put these values in the formula and solve for c.
First get the sum of the mass of each substance.
total mass = 3.50 g + 4.80 g + 7.20 g
total mass = 15.50 g
The percentage mass would be:
% mass = (7.20 g / 15.50 g) * 100%
<span>% mass = 46.45%</span>
