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Ronch [10]
3 years ago
12

How many mols of H3PO4 are produced when 284 g P4O10 reacts completely to form H3PO4? P4O10 + 6H2O --> 4H3PO4

Chemistry
1 answer:
LenKa [72]3 years ago
5 0

Answer:

4 moles of H3PO4

Explanation:

Molar mass of P4O10 = 284 g/mol

Number of moles of P4O10  reacted = 284g/284 g/mol = 1 mole of P4O10

From the reeaction equation;

1 mole of P4O10 yields 4 moles of H3PO4

Hence, 284 g of P4O10 yields 4 moles of H3PO4

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A lead mass is heated and placed in a foam cup calorimeter containing 40.0 mL of water at 17.0°C. The water reaches a temperatur
lbvjy [14]

Answer: 502 Joules

Explanation:

To calculate the mass of water, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of water = 1 g/mL

Volume of water = 40.0 mL

Putting values in above equation, we get:

1g/mL=\frac{\text{Mass of water}}{40.0mL}\\\\\text{Mass of water}=(1g/mL\times 40.0mL)=40.0g

When metal is dipped in water, the amount of heat released by lead will be equal to the amount of heat absorbed by water.

Heat_{\text{absorbed}}=Heat_{\text{released}}

The equation used to calculate heat released or absorbed follows:

q=m\times c\times \Delta T

q = heat absorbed by water

m = mass of water = 40.0 g

T_{final} = final temperature of water = 20.0°C

T_{initial = initial temperature of water = 17.0°C

c = specific heat of water= 4.186 J/g°C

Putting values in equation 1, we get:

q=40.0\times 4.186\times (20.0-17.0)]

q=502J

Hence, the joules of heat were re-leased by the lead is 502

5 0
3 years ago
Is a free electron the same as an electron
Sliva [168]
I don’t know about this ‍♀️
4 0
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Density is considered what type of property
Taya2010 [7]
Density is a physical property. It's measured and doesn't change the object chemically.
4 0
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Ganezh [65]

Answer:

1 Atm

Explanation:

Dalton's law

The total pressure is 3 Atm so all you have to do is subtract the other partial pressures from 3

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Which of the following is NOT true about one mole?
Lilit [14]
The option in “the mass of 1me of carbon equals the mass of 1 mole of boron atoms” is false since

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7 0
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