Calculate mass of each at STP.?

Question

178 ml CO2
155 ml O2
1.25 L SF6

and please show me how??



AND
How many liters of H gas are formed from the complete rxn of 1.45 mol of C? Assume H gas is collected at a pressure of 1.0 atm and temp 355 K.

C(s) + H2O(g)---->CO(g) + H2(g)

Please tell me how. IM LOST. Thanks

Answer 1

Well angel eve, usually I see you on marriage and divorce.

22.4 L is one mole of an ideal gas (which you can assume for these).
So, x mL of the gas/22,400 mL = # moles
Multiply that by the molecular weight gives you the mass.

In your balanced equation, 1.45 mol C gives 1.45 mol H2 gas. Use PV = nRT to calculate the volume

P = 1 atm
V = unknown
n = 1.45
R = (insert constant)
T = 355 K

This is as far as I can take you without outright giving you the answers.

Later

Answer 2

Are you ok with the answer already given for your first questions? Basically use the ideal gas law to calculate n (the number of moles) of each gas, and then use the molar mass of each to find the mass of each one.

For the second part, the equation is balanced, so 1 mole of C produces 1 mole of H2. You'll again just use the ideal gas law to calculate the volume of that number of moles of hydrogen at the temperature and pressure given in the problem...

Answer 3

STP is 0C and 1atm (or 760atm/torr)
Ideal gas law: PV=nRT where R is a constant (8.206 x10-2 L*atm/K*mole) states that 1 mole of gas will occupy 22.4L

Use molar mass and dimensional analysis to calculate mass (mL -> L -> mole/L -> g/mole)

Your last question doesn't make sense...can't make H gas from Carbon only

Answer 4

you need to use the suited gasoline regulation PV = nRT purely you need to use time-honored contraptions. STP = a million atm, 273.15 levels Kelvin suited gasoline consistent = 0.0821 L atm/mol ok After employing the suited gasoline regulation #a million will grow to be 0.260 mol of NO convert it to grams employing molar mass, 0.260 mol (30.01) you will get 7.80 grams of NO employing this trend, you are able to desire to truly be certain the different 2.

Answer 5

Sorry i don't know, but just wanted to let you know you look cute in a bathing suit, that guys just jealous cause his girlfriend doesn't look that good!! Hey i'm in Michigan, so i say were if the weather is right:)

Answer 6

0.3496 gm of CO2--1 gram molecule of CO2=44 grams(12+32)---mass of 22.4 liter of CO2 at STP =44gms --so 178ml of Co2=?
178X44/22400=0.3496 gm

Similarly for O2--32X155/22400=0.221 gram

Answer 7

The answer is 42.

Answer 8

You look hot in that swimsuit.