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Rufina [12.5K]
2 years ago
12

There are 235.5 grams of Calcium chloride dissolved in 2.5 liters of solution. What is the molarity of

Chemistry
1 answer:
Fed [463]2 years ago
7 0
M= moles/L covert 235.5 grams of CaCl2 using the molar mass of the compound obtaining the number of moles. Then divide the number by 2.5 L
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What are the physical properties of toothpaste
bogdanovich [222]
The whitening toothpastes showed differences in their physical-chemical properties. All toothpastes promoted changes to the surface, probably by the use of a bleaching agent.
5 0
3 years ago
How many liters of O2 at 298 K and 1.00 bar are produced in 1.50 hr in an electrolytic cell operating at a current of 0.0200 A?
stellarik [79]

Answer: 0.0069L

Explanation:

2H2O(l) ---->O2(g) + 4H+(aq) + 4e-

no of moles= it/eF

NO of moles of O2 produced = (Current in Ampere x Time in second)/ (Faraday constant x Number of electrons required)

Moles of O2 produced = (0.02x (60 x 60X1.5 s)/(96485 x 4)

= 0.0002798 moles= 2.798x 10 ^-4moles

Using  ideal gas equation,

P V = n R T

Where, P is the pressure,

V is the volume,

n is the number of moles,

R is the gas constant, and T is the temperature

We have, 1 bar = 0.986923 atm

Substituting the values,

V = nRT/P = (2.798 x 10-4moles x 0.08205 L atm mol K x 298 K)/ 0.986923 atm = 0.0069L

Volume of O2 produced = 0.0069L

7 0
3 years ago
How many moles are in a 111.5 gram sample of sodium chloride, NaCl?
Katarina [22]

Answer: 1.91 moles

Explanation:

First you want to find the molar mass of NaCL

Na = 22.99g  Cl = 35.45g

22.99g + 35.45g = 54.44g

Then divide 111.5g by 54.44g and this will give you moles.

5 0
2 years ago
Structure of isobutyl formate
Aliun [14]

Answer:

Isobutyl formate (2-methylpropyl methanoate) is an organic ester with the chemical formula C5H10O2. Used for flavor and fragrance because of its odor.

Explanation:

4 0
3 years ago
What is the molarity of a kf(Aq) solution containing 116 g of kf in 1.00 l of solution
Oduvanchick [21]

Answer:

2.00 M

Explanation:

K=39 F=19

39+19=58

116/58= 2 mol/ 1 L = 2 M

8 0
3 years ago
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