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4 years ago

How many moles are in 345g of Re

Chemistry

1 answer:

andre [41]4 years ago

4 0

Answer:

The number of mole is 1.852moles

Explanation:

To calculate the number of mole, using the formula

n = m/Mm

n - number of mole

m - number of mass

Mm - number of molar mass

The molar mass of Re = 186.207

Then, n = 345g/ 186.207g/mol

n = 1.852mol

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Enter your answer in the provided box. Liquid methanol (CH3OH) can be used as an alternative fuel in pickup and SUV engines. An

andreyandreev [35.5K]

Answer: E=∆H*n= -40.6kj

Explanation:

V(CO) =15L=0.015M³

P=11200Pa

T=85C=358.15K

PV=nRT

n=(112000×0.015)/(8.314×358.15)

n(Co)= 0.564mol

V(Co)= 18.5L = 0.0185m³

P=744torr=98191.84Pa

T= 75C = 388.15k

PV=nRT

n= (99191.84×0.0185)/(8.314×348.15)

n(H2) = 0.634mol

n(CH30H) =1/2n(H2)=1/2×0.634mol

=0.317mol

∆H =∆Hf{CH3OH}-∆Hf(Co)

∆H=-238.6-(-110.5)

∆H = 128.1kj

E=∆H×n=-40.6kj.

3 0

3 years ago

If the parents of these flowers were red/white, what would the offspring of the pink flowers be

MrMuchimi

Answer:

The chances of the offspting being pink is 50%

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3 years ago

Helium and neon are elements in group 8a of the periodic table. How do the electron dot diagrams of these elements compare?

Ad libitum [116K]

The electron dot diagram of helium has six fewer electrons than the electron dot diagram of neon.

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3 0

4 years ago

Read 2 more answers

Each continents were once joined together into one supercontinent what was it called Panterra, Panthalassa, Pangea, or Gia?

I am Lyosha [343]

Answer:

The correct answer is Pangea.

Explanation:

Pangea, also spelled Pangaea, in early geologic time, was a supercontinent that incorporated almost all the landmasses on Earth.

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8 0

3 years ago

7. A gas has a volume of 300 mL at 300 mm Hg. What will its volume be if the pressure is changed to 500 mm Hg?

USPshnik [31]

Answer:

The volume is

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

From the question

P1 = 300 mmHg

V1 = 300 mL

P2 = 500 mmHg

Substitute the values into the above formula and solve for the final volume obtained

That's

<h3> $V _{2} = \frac{300 \times 300}{500} \\ = \frac{90000}{500} \\ = \frac{900}{5}$ </h3>

We have the final answer as

Hope this helps you

7 0

4 years ago