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3 years ago

Calculate how many grams of of copper sulfate pentahydrate are required to prepare

1 answer:

8 0

Molar mass CuSO4.5H2O => 249.685 g/mol

Volume in liters => 100 mL / 1000 => 0.1 L

1 L ----------------- 0.05 M
0.1 L -------------- ?? ( moles of copper sulfate pentahydrate )

0.1 x 0.05 / 1 => 0.005 moles

1 mole ------------- 249.685 g
0.005 moles ------- ( mass of copper sulfate pentahydrate )

0.005 x 249.685 / 1 => 1.28425 g CuSO4.5H2O

hope this helps!

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The atmospheric pressure on the surface of Venus is 6.84X10^4. Calculate the atmospheric pressure in atm and torr. Round each of

quester [9]

Answer:

0.675 atm

513 Torr

Explanation:

Given is that, the atmospheric pressure on the surface of Venus is

6.84 X 10⁴ Pa.

1 atm (atmospheric pressure) is equal to 101325 pascal (Pa).

To convert divide the pressure value by 101325.

Pressure in atm = $\frac{6.84 \times 10^{4} }{101325}$

= 0.675055 atm

Rounding it off to 3 significant digits: 0.675 atm

Now, one Torr is 133.322 Pa. For conversion, divide the pressure value by 133.322.

Pressure in Torr = $\frac{6.84 \times 10^{4} }{133.322}$

=513.04219 Torr

Rounding it off to 3 significant digits: 513 Torr

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3 years ago

g n the Ideal Gas Law lab, how is the temperature of the hydrogen gas determined? Select one: The pressure of the gas is determi

Charra [1.4K]

Answer:

The volume of the gas is determined, which will allow you to calculate the temperature.

Explanation:

According to Charles law; the volume of a given mass of an ideal gas is directly proportional to its temperature at constant pressure.

This implies that, when the volume of an ideal gas is measured at constant pressure, the temperature of the ideal gas can be calculated from it according to Charles law.

Hence in the Ideal Gas Law lab, the temperature of an ideal gas is measured by determining the volume of the ideal gas.

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3 years ago

What is the ph of a 0.014 M HCL solution?

Allushta [10]

Answer:

pH $= 1.853$

Explanation:

For every mole of hydrochloric acid, one mole of hydronium ion is required. Thus, in order to neutralize 0.014 moles of HCL, 0.014 moles of hydronium is required.

$[H_3O^+] = [HCl] = 0.014$

pH $= -log [H^+] = -log [H_3O^+]$

Substituting the available values in above equation, we can say that the pH of the solution is equal to

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pH $= 1.853$

pH of a $0.014$ M HCL solution $= 1.853$

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True.

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4 years ago

Fires in forests can sometimes be stopped by cutting down trees to make a gap called a for break. Which part of the fire triangl

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It removes the fuel for the flame.

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3 years ago