Answer:
27.7 g
Explanation:
To solve this problem we use the definition of <em>molarity</em>:
From the problem we're given M = 2.5 M and volume = 0.100 L. We use the above formula and <u>calculate the required moles of calcium chloride</u> (CaCl₂):
Finally we use the<em> molecular weight</em> of calcium chloride to <u>calculate the required mass</u>:
- 0.25 moles CaCl₂ * 110.98 g/mol = 27.745 g CaCl₂
Rounding to the nearest tenth of a gram the answer is 27.7 g.
I believe the correct response is A. At higher elevations it would take less time to hard boil an egg, because there is less atmospheric pressure.
CaCl₂ → Ca²⁺ + 2Cl⁻
∑=1+2=3
D) 3 mol
From equation;
P1V1=P2V2
V2=P1V1÷P2
since P2=380mmHg
now;1atm=760mmHg
how about 380mmHg is equal to how many atm?
380×1÷760=0.5atm
P2 now is equal to 0.5atm
back from equation;
P1V1=P2V2
V2=P1V1÷P2
V2=4.0atm×2.0L÷0.5atm
V2=16L
therefore V2=16L.