How many molecules of n2 gas can be present in a 2.5 l flask at 50c and 650 mmhg?

1 answer:

6 0

First step is to change temperature and pressure into SI units:
50 degree celcius = 50 + 273 = 323 degree kelvin
650 mmHg = 650/760 = 0.855 atm

Second step is to calculate the number of moles of N2 that can be found under the mentioned conditions using the rule:
PV = nRT where:
P is the pressure, V is the volume, n is the number of moles, R is the gas constant (= 0.08206) and T is the temperature.
Substituting in the equation we get:
0.855 x 2.5 = n x 0.08206 x 323
n = 0.0806 moles

Third step is to get the number of molecules in 0.0806 moles by multiplying the number of moles by Avogadro's number:
number of molecules = 0.0806 x 6.02 x 10^23 = 0.485212 x 10^23 molecule

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What mass of carbon monoxide is produced when 1.50 moles of oxygen react completely in the following equation? 2C + O₂ → 2CO

Hitman42 [59]

Answer:

The answer to your question is 3 moles of CO

Explanation:

Data

mass of CO = ?

moles of O₂ = 1.50

Balanced chemical reaction

2C + O₂ ⇒ 2CO

Process

To solve this problem use proportion and cross multiplication. Use the coefficients of the balanced equation.

1 mol of oxygen ------------------ 2 moles of CO

1.5 moles of oxygen ----------- x

x = (1.5 x 2) /1

-Simplification

x = 3 / 1

-Result

x = 3 moles of CO

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Here we have to calculate the heat required to raise the temperature of water from 85.0 ⁰F to 50.4 ⁰F.

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On plugging the values we get:

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goldfiish [28.3K]

Answer: $_{-1}^0\beta$

Explanation:

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where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

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