Answer:
0.640mol/L
Explanation:
Firstly, we can calculate the number of moles of nitric acid. We can do thi by using the formula: n=cv (no. moles = concentration x volume).
The given concentration is 1.60mol/L, so we need to convert the given volume into liters to use the formula correctly. There are 1000mL in a L therefore 200/1000 = 0.200L
1.60x0.200 = 0.320 total moles of nitric acid.
Now we can use n=cv to work out the new concentration by rearranging to c=n/v.
Our new volume is 0.200+0.300 = 0.500L
And our number of moles is 0.320.
Therefore the new concentration of the acid is:
c=0.320/0.500 = 0.640mol/L
Hope this helps!
