First, you need grams but you have moles.
Find out the total molar mass of SiO₂
Si = 28.085 g/mol Si
O₂ = 32 g/mol O₂
Add them together to get the molar mass
28.085 g/mol Si + 32 g/mol O₂ = 60.085 g/mol SiO₂
Multiply the molar mass of SiO₂ by the number of moles you have of the same substance:
60.085 g/mol SiO₂ × 0.125 mol SiO₂ =
7.51 grams SiO₂
As per Ideal gas equation, molar mass of the gas is 5.032 g/mo
We’ll begin by calculating the number of mole of the gas. This can be obtained as follow:
Volume (V) = 1.6 L
Temperature (T) = 287 K
Pressure (P) = 0.92 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Number of mole (n) =?
According to Ideal gas equation , PV = nRT
0.92 × 1.6 = n × 0.0821 × 287
1.472 = n × 23.5627
Divide by 23.5627
n = 1.176 / 23.5627
n = 0.0624 mole
Finally, we shall determine the molar mass of the gas. This can be obtained as follow:
Mass of gas = 0.314 g
Number of mole = 0.0624 mole
Mole = 
0.0624 = 
Cross multiply
0.0624 × molar mass of gas = 0.314
Divide by 0.0624
Molar mass of gas = 
Molar mass of gas = 5.032 g/mo
Therefore the Molar mass of gas is 5.032 g/mo
Learn more about Ideal gas equation here:
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Answer:
Conduction, Convection, and Radiation .......
Answer: I believe it’s the second one
(F)
Explanation:
Answer:
Na(s) + H₂O (l) → NaOH(aq) + H₂(g).
Explanation:
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