Answer:
The amount/type of stain
Explanation:
You would want to ensure that the stain was the same in both samples.
6) Na2 SO4
7)nonmetallic elements
10)mass
11) mole
* sorry I didn't know Q. 8/9
Answer: 6 moles of NaCl are produced when 2 moles of sodium phosphate reacts with 3 moles of calcium chloride
Explanation:
The balanced chemical equation is:
According to stoichiometry :
2 moles of
require 3 moles of
Thus both are limiting reagent as both will limit the formation of product.
As 2 moles of
reacts with 3 moles of
give = 6 moles of 
Thus 6 moles of NaCl are produced when 2 moles of sodium phosphate reacts with 3 moles of calcium chloride
Wavelength x Frequency = Speed
So, 5.9 x 10^-7 x F = 3 x 10^8
Rearranging the equation, we get:
F = (3 x 10^8)/(5.9 x 10^-7) = 5.08 x 10^14 Hz
Hope I helped!! xx
B. Moles of solute, liters of solution