Sorry, I can't really see the question )-:
Answer:
The HCl will dissolve the calcium readily
Explanation:
HCl will react with d calcium, dissolving it to produce Hydrogen gas
Pangea was a large super continent that existed millions of yearts ago
hope this helps!
1 mole => 6.023 x 10^23 molecules
x => 8.5 x 10^25 molecules
x = 8.5x10^25/ 6.023 x 10^23 = 141.1
Answer:
200 g/L
Explanation:
The concentration of a solution (also called molarity) can be calculated with the formula:

where
m is the mass of the solute
V is the volume of the solution
For the solution in this problem we have:
m = 50g is the mass of the solute
V = 250 mL = 0.250 L is the volume of the solution
Therefore, the concentration of the solution is:
