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enot [183]
4 years ago
12

A sample of gas occupies a volume of 120.0 mL at a pressure of 0.75 atm and a temperature of 295 K. What will the volume be at a

pressure of 1.25 atm and a temperature of 345 K?
48 mL

4 mL

8 mL

84mL
Chemistry
1 answer:
MakcuM [25]4 years ago
6 0
The answer to the question is 84
(Step By Step Explanation).
P1 V1/T1= P2 V2/T2
::0.75 x 120/295 = 1.25 x V2/345
90/295= 1.25V2/345
(cross multiply )
1.25V2 x 295 = 90 x 345
368.75V2 = 31050
(divide by the coefficient of the unknown) .
368.75V2/368.75 = 31050/368.75
V2 = 84.2. = 84
::The volume is 82.
Mark As brainliest
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What is the new boiling point if 25 g of NaCl is dissolved in 1.0 kg of water
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The correct answer for the question that is being presented above is this one: 

Given that:
delta Tb = Kbm Kb H2O = 0.52 degrees C/m 
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</span>
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molality = mol solute / kg solvent 

<span>We are given the amount of solute in grams
Since amount of solute is given in moles, we have to convert 25 g NaCl to moles. Divide by molar mass. </span>

<span>25 g NaCl / 58.5 g/mol = 0.427 mol </span>

<span>Then, use the formula for molality. </span>

<span>molality = mol solute / kg solvent </span>
<span>= 0.427 / 1 </span>
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<span>Use now the formula to get the boiling point.</span>

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8 0
3 years ago
Which is a problem associated with the use of trees for biomass? I. Potential deforestation II. Burning fossil carbon III. Poten
BigorU [14]

Answer:

Both Option (I) and Option (III)

Explanation:

Biomass is usually defined as those organic molecules that are obtained from plants and animals, in order to produce energy. It is a renewable resource. Some of the examples of biomass include wood, crop, animal fossil fuel.

A large number of trees are being cut down to construct these biomass energies such as woods. This results in the deforestation process where the forested areas are converted into empty dry soils. This results in the increasing rate of erosion because the prevailing wind and flowing water can easily carry away the topsoil and loses the fertility of the soil.

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7 0
4 years ago
Can anyone please help me find molar masses of compounds. For example Copper (ll) sulfate (CuSO4)
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Answer:

Explanation:

You would have to add up the atomic masses of all the compounds in the compound, making sure you include how many molecules of each are in the compound

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The atomic masses are as follows:

Cu = 63.55 u

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This is how we would add it up:

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(63.55) + (32.065) + 63.96

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7 0
2 years ago
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jolli1 [7]

Answer:

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The given equation in unit form can be rewritten as:

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Arranging in two parts, we get,

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Now, calculating the value of X and Y,

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Hence, 10 times as many as 1 hundred is 1 thousand.

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To learn more about hundreds, thousands, and place values, visit: brainly.com/question/17785584

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