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3 years ago

How many formula units make up 11.8 g of Magnesium Chloride (MgCl2)

1 answer:

4 0

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

11.8 g ( 1 mol / 95.21 g ) ( 6.022 x 10^23 formula units / mol ) = 7.46 x10^22 formula units

Hope this answers the question. Have a nice day.

You might be interested in

What is the final temperature, in degrees Celsius, of the gas in the bubble outside the volcano if the final volume of the bubbl

lawyer [7]

The question is incomplete, here is the complete question:

A 127 mL bubble of hot gases at 213°C and 1.89 atm is emitted from an active volcano.

What is the final temperature, in degrees Celsius, of the gas in the bubble outside the volcano if the final volume of the bubble is 136 mL and the pressure is 0.850 atm , if the amount of gas does not change?

Answer: The temperature of the gas is -40°C

Explanation:

To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.

The equation follows:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1,V_1\text{ and }T_1$ are the initial pressure, volume and temperature of the gas

$P_2,V_2\text{ and }T_2$ are the final pressure, volume and temperature of the gas

We are given:

$P_1=1.89atm\\V_1=127mL\\T_1=213^oC=[213+273]K=484K\\P_2=0.850atm\\V_2=136mL\\T_2=?$

Putting values in above equation, we get:

$\frac{1.89atm\times 127mL}{484K}=\frac{0.850atm\times 136mL}{T_2}\\\\T_2=\frac{0.850\times 136\times 484}{1.89\times 127}=233K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$233=T(^oC)+273\\\\T(^oC)=-40^oC$

Hence, the temperature of the gas is -40°C

3 0

3 years ago

What three consumers live in the epipelagic zone?

siniylev [52]

Answer:

The epipelagic zone reaches from the surface of the ocean down to around 650 feet. This is the zone most exposed to light, and as such is host to the highest concentrations of the ocean's life. There are thousands of animals that roam this zone, including dolphins, most sharks, jellyfish, tuna and corals.

(From Internet I’m being honest)

3 0

3 years ago

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

cupoosta [38]

Answer:

helium

Explanation:

coz it take part In fusion reaction

8 0

3 years ago

Although objects can go through physical and changes, the amount of matter in those objects remains the same. This is known as t

Liula [17]

The question above is incomplete, the options attached tot he question are given below:
A. A structure made of building blocks.

The blocks of the same structure bundled in a pile.

B. A snowman.

The melted remains of the same snowman.

C. A lump of clay.

The same lump broken into three pieces.

D. 1 cup of water and one gram of salt, separated.

The same cup of water with one gram of salt mixed in.

E. One apple.

The same apple cut into slices.

ANSWER:

The correct options are these:

B. A Snowman and the melted remain of the same snowman.

C. Lump of clay and the same clay broken into three pieces.

E. One apple and the same apple cut into slices.

For all the three answers listed above, the mass of the pairs will remain the same because nothing has been taken out of them and nothing is added to them, they were just changed from one form to another. The other options are wrong because, something got added to the original material.

4 0

3 years ago

HELP! Question 11.

xxMikexx [17]

Answer:

Warm front Forms when a moist, warm air mass slides up and over a cold air mass. As the warm air mass rises, it condenses into a broad area of clouds. A warm front brings gentle rain or light snow, followed by warmer, milder weather.

Your answer is B.

Enjoy.

6 0

3 years ago