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Tems11 [23]
3 years ago
10

3. If 2.00 mL of the 0.15 M Co(NO3)2 solution is diluted to 10.00 mL with water, what is the resulting Co(NO3)2 concentration?

Chemistry
1 answer:
kvasek [131]3 years ago
4 0

0.025 M will be the resulting concentration

Explanation:

To find the resulting concentration we use the following formula:

initial concentration × initial volume = final concentration × final volume

initial concentration = 0.15 M

initial volume = 2 mL

final concentration = ?

final volume = 10 + 2 = 12 mL

0.15 × 2 = final concentration × 12

final concentration = (0.15 × 2) / 12

final concentration =  0.025 M

Learn more about:

molar concentration

brainly.com/question/13913199

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3 years ago
Which statement describes one characteristic of an operating electrolytic cell?
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8 0
3 years ago
Gaseous hydrogen and oxygen can be prepared in the laboratory from the decomposition of gaseous water. The equation for the reac
nata0808 [166]

Answer:

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Explanation:

Hello.

In this case, given the chemical reaction, we can compute the grams of oxygen by using the 98.2 g of water via the 2:1 mole ratio between them, the molar mass of water that is 18.02 g/mol, the molar mass of gaseous oxygen that is 32.00 g/mol and the following stoichiometric procedure relating the given information:

m_{O_2}=98.2gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{1molO_2}{2molH_2O}*\frac{32.00gO_2}{1molO_2}   \\\\m_{O_2}=87.2gO_2

In which the result is displayed with three significant figures because the given mass of water 98.2 g, has three significant figures too.

Best regards!

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11. What is the concentration (in M) of an ammonia (NH3) solution if 12.23 grams of ammonia are
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