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2 years ago

You have 54.32 grams of PbCl4. How many moles of PbCl4 do you have?

Chemistry

1 answer:

xxTIMURxx [149]2 years ago

4 0

Answer is 0.1565417867........

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Can some one pls help me

Ostrovityanka [42]

The answer is B. It will grow towards the hole in the box because the plant will try and get as close to the sunlight as possible which is called phototropism.

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3 years ago

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A salt crystal has a mass of 0.11 mg. How many NaCl formula units does it contain? Express your answer using two significant fig

Ann [662]

<u>Answer:</u> The number of formula units in the given amount of NaCl are $1.1\times 10^{18}$

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of NaCl = 0.11 mg = $1.1\times 10^{-4}g$ (Conversion factor: 1 g = 1000 mg)

Molar mass of NaCl = 58.5 g/mol

Putting values in above equation, we get:

$\text{Moles of NaCl}=\frac{1.1\times 10^{-4}g}{58.5g/mol}=1.88\times 10^{-6}mol$

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of formula units

So, $1.88\times 10^{-6}mol$ moles of NaCl will contain = $(1.88\times 10^{-6}\times 6.022\times 10^{23})=1.1\times 10^{18}$ number of formula units

Hence, the number of formula units in the given amount of NaCl are $1.1\times 10^{18}$

6 0

3 years ago

Give me lil reasoning so I know your not lying for points

rjkz [21]

1mL=0.001L
so if you have 300mL, multiply that by 0.001 to give you 0.3L

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3 years ago

a sample of gas with a volume of 30.0 ml at 25.0 °c is heated to 50.0 degrees celsius. what is the new volume of the gas?

mart [117]

Answer : The new volume of the gas is, 32.5 mL

Explanation :

Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure and number o moles of gas.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=30.0mL\\T_1=25.0^oC=(25.0+273)K=298K\\V_2=?\\T_2=50.0^oC=(50.0+273)K=323K$

Putting values in above equation, we get:

$\frac{30.0mL}{298K}=\frac{V_2}{323K}\\\\V_2=32.5mL$

Therefore, the new volume of the gas is, 32.5 mL

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3 years ago

(Multiple choice) Which actions are part of the dissolution process of an ionic solute in water?

yulyashka [42]

Answer: Each ion is surrounded by water molecules

Explanation: The ions are surround by the water molecules which act as a barrier around the ions and prevent the recombination of ions. The ions are said to be hydrated.

3 0

3 years ago

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