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Dahasolnce [82]
3 years ago
14

0.45 mole of krypton gas occupies a volume of 1.6 L. What volume will 1.8 moles of krypton occupy assuming the temperature and p

ressure remain the same
Chemistry
1 answer:
Paul [167]3 years ago
8 0

Answer:

6.4 L

Explanation:

As the temperature and pressure are assumed to remain the same, we can solve this problem by using <em>Avogadro's law</em>, which states:

  • V₁n₂ = V₂n₁

Where in this case:

  • V₁ = 1.6 L
  • n₂ = 1.8 mol
  • V₂ = ?
  • n₁ = 0.45 mol

We <u>input the data given by the problem</u>:

  • 1.6 L * 1.8 mol = V₂ * 0.45 mol

And <u>solve for V₂</u>:

  • V₂ = 6.4 L
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If body fats has a density of 0.94 g/mL and 3.0 liters of fat are removed, how many pounds of fat were removed from the patient?
-Dominant- [34]

Answer:

6.217 pounds

Explanation:

We are given;

  • Density of body fats 0.94 g/mL
  • Volume of fats removed = 3.0 L

We are required to determine the mass of fats removed in pounds.

We need to know that;

Density = Mass ÷ volume

1 L = 1000 mL, thus, volume is 3000 mL

Rearranging the formula;

Mass = Density × Volume

         = 0.94 g/mL × 3000 mL

         = 2,820 g

but, 1 pound = 453.592 g

Therefore;

Mass = 2,820 g ÷ 453.592 g per pound

         = 6.217 pounds

Thus, the amount of fats removed is 6.217 pounds

4 0
4 years ago
According to the chart of specific heats, which material requires the most heat to raise its temperature from 10°C to 30°C?
myrzilka [38]

The material which requires the most heat to raise its temperature from 10°C to 30°C is oil.

<h3>What is the formula to calculate absorbed heat?</h3>

The formula which we used to calculate the amount of involved heat in relation with specific heat is:

Q = mcΔT, where

  • Q = absorbed heat
  • m = mass
  • c = specific heat
  • ΔT = change in temperature

Among the given materials, specific heat of oil is highest than other materials so will require maximum absorbed heat.

Hence, oil requires the most heat.

To know more about specific heat, visit the below link:

brainly.com/question/6198647

#SPJ1

8 0
2 years ago
Usually potassium hydrogen phthalate is kept very pure. But Stu Dent thinks the bottle of potassium hydrogen phthalate has been
Ahat [919]

Answer:

1.784 g

Explanation:

The equation of the reaction is;

NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)

Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M

Number of moles of NaOH reacted =8.735 * 10^-3 moles

From the reaction equation;

1 mole of NaOH reacted with 1 mole of KHC8H4O4

Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.

So,

Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g

5 0
3 years ago
Ice cream is made by freezing a liquid mixture that, as a first approximation, can be considered a solution of sucrose in water.
hjlf

Answer:

Freezing point is -2.81°C

Explanation:

34g/342gmol^-1 = 0.0994mol

n = m/mr

Molarity= 0.994/ 0.66 = 1.51M

◇T = -i × m ×Kf

Where ◇T is freezing depression

i= Vant Hoff factor

m = molarity

Kf = freezing content = 1.

860kgmol^-1

◇T =-1 × 1.51 × 1.860 = - 2.81°C

6 0
3 years ago
How many molecules does Ba3(PO4)2 contain
Natalija [7]

Answer:

Molecular mass of Ba3(PO4)2 = 3 × 137.5 + 2 [31 + 4 × 16] = 602.5

Explanation:

hope this helps

plz mark brainliest

6 0
2 years ago
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