T0. Calcu the molar mass of gas that has 2.05 g/L of density at STP. A. 46.01 g/
ID: 1039979 • Letter: T
Question
T0. Calcu the molar mass of gas that has 2.05 g/L of density at STP. A. 46.01 g/mole 8. 19.6 g/mole C. 107.9 g/mole D. 98.6 g/mole E. none of them 11. A mixture of three gases has tota SO2. 1.04 mos a total pressure of 925 mmHg. The mixture is analyzed and found to contain 0.2 mol O2, and 2.50 mol NHs. What is the partial pressure of CO:? A. 0.258 atm E.None of them 8.301 mmHg C. 356 mmHg D.0.34 atm _12. A sample of a gas at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure A) 1.5 8)7.5 C) 0.67 D) 3.3 E) 15 13. What is the correct electron configuration for Zn D) [Ne] 3d" 4s E) None of them 14. What is the density of CO2 gas under STP conditions? E. None C. 1.96 g/ D. 6.2 g/L B. 3.2 g/L A. 3.5 g/L Consider the following two reactions: -15.Explanation / Answer
10.
We know that
Density = mass/ volume
2.05 = mass/22.4 [ vol at STP=22.4L]
Mass = 2.05x22.4
Mass =45.92
Mass = 46.01 approx on rounding
Hence option (a) is correct.
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