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Lena [83]
3 years ago
13

1. A positive value for AH for a chemical reaction is an indication of which of the following?

Chemistry
1 answer:
goldenfox [79]3 years ago
5 0
C is the correct answer
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Choose all the answers that apply.
Anni [7]

Answer:

I believe it's the lowest portion of the atmosphere

3 0
2 years ago
PLEASE HELP
Varvara68 [4.7K]
Ok measure atoms the answer is B
5 0
3 years ago
Read 2 more answers
What volume will 2.5 mol of a gas at STP occupy ?
kvv77 [185]

Answer:

56

Explanation:

1 mole of gas at STP occupies 22.4 L of the gas

2.5 mole of the gas at STP occupies 22.4×2.5 L of the gas

so 2.5 mole of the gas at STP occupies 56 L of the gas .

6 0
2 years ago
A gas has a volume of 240.0mL at 25C and 600.0 mmHg. Calculate it's volume at STP
atroni [7]
760.0 mmHg(V)=600.0mmHg(240.0mL)
600(240)/760=189mL
6 0
3 years ago
What is the pressure, in atmospheres, of a 0.108-mol sample of helium gas at a temperature of 20.0°C if its volume is 0.505 L?
SpyIntel [72]

Answer:

P = 5.14ATM

Explanation:

Number of moles = 0.108moles

Temperature (T) = 20°C = 20 + 273.15 = 293.15K

Volume V = 0.505L.

Pressure (P) = ?

R = 0.082J/mol.K

From ideal gas equation,

PV = nRT

P = nRT / V

P = (0.108 * 0.082 * 293.15) / 0.505

P = 2.596 / 0.505

P = 5.14ATM

The pressure of the gas is 5.14ATM

5 0
3 years ago
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