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3 years ago

5

: Question List

1 answer:

Ira Lisetskai [31]3 years ago

6 0

Potassium it is the answer

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If an endothermic process absorbs 256j how many kilocalories are absorbed

Finger [1]

There are several units for expressing energy, Most common are joules and kilocalories.

The conversion factor of joule to kilocalories is
1 kilo calorie = 4184 J
∴ x kilo calorie = 256 J

x = $\frac{256}{4184} = 0.0611$ kilo calories

Thus, 256 J = 0.0611 kilocalories

8 0

3 years ago

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Which of the following statements of kinetic molecular therapy explains the compresssbilty of gases compared to liquids and solu

valkas [14]

Answer:

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3 years ago

How many grams of CO2 could be formed with 2.09 x 1023 atoms of O?

choli [55]

Answer:

r u in high school this is hard

Explanation:

6 0

3 years ago

A 10-liter container has 2 moles of oxygen at a pressure of 92 kpa. The effective speed (rms) of the oxygen molecules in the gas

bezimeni [28]

The effective speed (rms) of the oxygen gas is 293.68 m/s.

<h3></h3><h3>What is Root-mean-square velocity?</h3>

Root mean square velocity is the square root of the mean of squares of the velocity of individual gas molecules

$v_{rms}=\sqrt[]{\frac{3RT}{M} }$

<em>where </em>R = universal gas constant

M = molar mass of the gas in kg/mol

T = temperature in Kelvin

According to the ideal gas law,

PV = nRT

RT = $\frac{PV}{n}$

Substitute in the rms velocity formula,

$v_{rms} = \sqrt[]{\frac{3PV}{nM} }$

P = 92 kPa, V = 10 L, n = 2 moles and M = 32 x 10⁻³ kg/mol

$v_{rms} = \sqrt[]{\frac{3\times92\times10}{2\times32\times10^-^3} }$

=293.68 m/s

Thus, the effective speed (rms) of O₂ gas is 293.68 m/s.

Learn more about Root-mean-square velocity:

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4 0

1 year ago

A flask holds 3.01 x 1023 molecules of carbon dioxide. The container is holding ________

sammy [17]

(B), because 1.0 moles would be 6.02 x 10^23 molecules. So you have half a mole.<span>
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8 0

3 years ago