Question

You have 357 mL of chlorine trifluoride gas at 699 mmHg and 45 * C. What is the mass in grams of the sample?

Answer 1

@ganeshie8

Answer 2

what the heck is mmHg?

Answer 3

why is that a pressure?

Answer 4

mmHg is A millimeter of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high. It is now defined precisely as 13.5951 × 9.80665 = 133.322387415 pascals. Wikipedia

Answer 5

okay thank you

Answer 6

MM is millimeter and Mercury on the Periodic table is Hg

Answer 7

so can you plz point me i the right direction as to how to solve the problem?

Answer 8

Hold on a second because I have not even read it yet :P

Answer 9

wait we use pv=nRT

Answer 10

all i need to do is convert mL to L and C to K then I can apply pv=nRT

Answer 11

P = 699mm Hg = 0.920atm 699/760atm =
V = 427mL = .427 L
= 45 T = 45oC +273 k = 318K
R = .0821Latm/mol.K
find n number of moles
n = PV / RT = .920 X .427 / (.0821 X318) = 0.0150
mass = molesX molarmass = 0.0150 X 92.45 = 1.39g

Answer 12

once i obtain the mols of the compound I can solve for grams of the compound

Answer 13

I honestly dont know how to solve this all I did was google search it because I was lost

Answer 14

https://mx.answers.yahoo.com/question/index?qid=20100223115137AAQGYLH

Answer 15

Sorry :/

Answer 16

what? lost?

Answer 17

Yeah Im not really sure how to solve this?

Answer 18

PV=nRT
Pressure is measured in pascal. you need to know that 1mmhg is equivalent to 133.322368pascal, if we convert 699mmhg to pascal.we multiply 699 by 133.322368 to get 93192.335232 pascals. The SI unit for volume is m^3. 1ml is 1*10^-6. so changing the 375 ml to m^3 we multiply by 10^-6 getting 375*10^-6 m^3. R is a gas constant value of 8.31 and temperature has to be measure in kelvin. to change from degrees we add 273 to 45. Number of moles=mass/molar mass

Answer 19

93192.335232*375*10^-6=mass/35.5*8.31*318
35.5(93192.335232*375*10^-6)=mass*2642.58
mass=1240.622/2642.58