Answer:
Explanation:
The concentration is 2.91 moles / Liter.
The moles don't change when the new water of 93mL is added.
Starting number of moles
C = 2.91 moles / Liter
m = ?
V = 1 Liter. = 1000 mL
C = m/V
2.91 moles / L = m/1 Liter
2.91 moles in 1 Liter
Moles in 188 mL
2.91 moles / 1000 mL = x moles / 188 mL Cross multiply
2.91 moles * 188 mL = 1000 x
547 moles mL = 1000 mL x Divide by 1000
547 moles mL
============ = x
1000 mL
0.547 moles in 188 mL
Now add 93 mL to 188 mL
281 mL
Finally calculate the concentration.
C = 0.547 moles / 281 mL
C = 0.00194 moles / mL
C = 1.93 moles / L
