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goldfiish [28.3K]
3 years ago
6

What will the volume of a 3.8 M solution be if it contains 4.9 grams of calcium hydroxide?

Chemistry
1 answer:
Mekhanik [1.2K]3 years ago
6 0

Answer:

no of moles = <u>volume in cm3 x concentration in</u> <u>mol/dm3 or M </u>

1000

no of moles =<u> mass</u>

molar mass

<u>mass</u>

molar mass =<u> vol x con</u>

1000

molar mass of ca(oh)2 = 74 g/mol

<u>4.9</u><u> </u><u>=</u><u> </u><u>vol</u><u> </u><u>x</u><u> </u><u>3</u><u>.</u><u>8</u><u> </u>

74. 1000

= 17.42 g

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A 3000 MWt fast reactor has a 42% efficiency. This reactor operates for 23 months followed by a 1 month down time for refueling
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Answer:

capacity factor = 0.952

Availability factor = 0.958

Explanation:

1) capacity factor

capacity factor = actual power output /  maximum power output

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                       = \frac{1200}{\frac{42}{100}*3000}

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2) Availability factor

Availability factor  = Actual operation time period/ total time period

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8 0
3 years ago
Gold is used for making ornaments give reason <br><br>​
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Answer:

they are nice to look at....

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How does increasing temperature increase the number of reactions?
antiseptic1488 [7]

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A sample of neon initially has a volume of 2.80 L at 23 degrees Celsius. What is final temperature, in degrees Celsius, is neede
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The relation between the volume and the temperature of the gas is given by Charles's law. The final temperature of the gas at 0.75 liters is -193.8°C.

<h3>What is Charles's law?</h3>

Charles's law was derived from the ideal gas equation and is used to state the relationship between the temperature and the volume of the gas. With a decrease in volume the temperature decreases.

If the pressure is kept constant then with an increase in temperature the volume of the gas expands. The law is given as,

V₁ ÷ T₁ = V₂ ÷ T₂

Given,

Initial volume (V₁) = 2.80 L

Initial temperature (T₁) = 23 °C = 296.15 K

Final volume (V₂) = 0.75 L

Final temperature = T₂

Substituting the values above as:

T₂ = (V₂ × T₁) ÷ V₁

= 0.75 × 296.15 ÷ 2.80

= 79.325 K

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Therefore, the final temperature is -193.8°C.

Learn more about Charle's law, here:

brainly.com/question/16927784

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