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Inessa05 [86]
3 years ago
6

HELP URGENT!!!!!

Chemistry
2 answers:
IrinaVladis [17]3 years ago
6 0

The answer is 4. (The word auditory always has something to do with hearing or the ear.)

iren [92.7K]3 years ago
4 0
I believe the answer is number 4
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Nitrate salts (NO3-), when heated, can produce nitrites (NO2-) plus oxygen (O2). A sample of potassium nitrate is heated, and th
yarga [219]

Answer:

0.0676 moles of oxygen gas is produced

Explanation:

Step 1: Data given

Volume of the flask = 730 mL = 0.730 L

The pressure of the gas in the flask is 2.5 atm

The temperature is recorded to be 329 K

Step 2: The balanced equation

2NO3- → 2NO2- + O2

Step 3: Calculate moles oxygen gas (O2)

p*V =n * R*T

⇒with p = the pressure of oxygen gas = 2.5 atm

⇒with V = the volume of the flask = 0.730 L

⇒with n = the number of moles O2 gas

⇒with R = the gas constant = 0.0821 L*atm/mol*K

⇒with T ⇒ the temperature = 329 K

n = (p*V) / (R*T)

n = (2.5 * 0.730 ) / (0.0821*329)

n = 0.0676 moles

0.0676 moles of oxygen gas is produced

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