Answer:
The new molarity is 0,1359M.
Explanation:
A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).
We use the formula for dilutions:
C1 x V1 = C2 x V2
0,60 M x 0,639 L= C2 x 2,822 L
C2=(0,60 M x 0,639 L)/ 2, 822 L
<em>C2=0,1359 M</em>
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The change in temperature that occurs when 8000 J of heat is used by a mass 75 g of water is 25.4 °C
H = mc ΔT
m = 75 g
c = 4. 200 J/ g °C
H = 8000 J
ΔT =?
Rearranging the formula, making ΔT the subject of formula;
ΔT = H / m c
ΔT = 8000 / 75 * 4.200
ΔT = 8000 / 315
ΔT = 25.4 °C