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If all of the chloride in a 3.734-g sample of an unknown metal chloride is preci

ID: 842874 • Letter: I

Question

If all of the chloride in a 3.734-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO3, what is the percentage of chloride in the sample? 50.52percnt 13.53percnt 1.425percnt 7.391percnt none of the above A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6 degreeC. Determine the temperature at which the volume of the gas is 3.42 L. 278 K 312 K 20.4 K 295 K 552 K Consider three 1-L flasks at STP. Flask A contains NH, gas flask B contains NO2 gas, and flask C contains N2 gas. Which flask contains the largest number of molecules? Flask A Flask B Flask C

Explanation / Answer

10) moles AgNO3 = 0.07090 L x 0.2010=0.01425
= moles Cl-

mass Cl- = 0.01425 x 35.453 g/mol=0.50520525

% Cl- = 0.5052 x 100/ 3.734=13.5297268344938404 %

11)This is Charle's Gas Law of Direct Proportion at constant Pressure.
Temp must be in K = 21.6

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