Best writers. Best papers. Let professionals take care of your academic papers

Order a similar paper and get 15% discount on your first order with us
Use the following coupon "FIRST15"
ORDER NOW

. A 37.1 gram sample of impure potassium ni- trate (KNO3) was heated to complete decom- position according to the equation

/in /by

Hi! I have a few problems that I really need help with!

/>/tmp/405-14764567889603512-6231-39416.dvi

1. A 37.1 gram sample of impure potassium ni- trate (KNO3) was heated to complete decom- position according to the equation

2 KNO3(s) → 2 KNO2(s) + O2(g) 

After the reaction was complete, the volume of the dry gas produced was 1 liters at 35◦C and 761 torr. What was the percent KNO3 (101.1 g/mol) in the original sample? (As- sume that only the potassium nitrate had decomposed.)

Answer in units of %. /tmp/405-14764567889603512-6231-39416.dvi

2. What is the percent yield if 4.51 moles of CH4 produces 16 L of CO2 at STP?

CH4 + 2 O2 → CO2 + 2 H2O

3. /tmp/405-14764567889603512-6231-39416.dvi

If 0.27 mol of CS2 reacts with oxygen com- pletely according to the equation

CS2(l) + 3 O2(g) → CO2(g) + 2 SO2(g)

what volume (total) would the products oc- cupy if they were measured at STP?

4. /tmp/405-14764567889603512-6231-39416.dvi

A sample of oxygen is collected in a 372 mL container over water at 15◦C, and the barom- eter reads 776 torr. What volume would the dry gas occupy at 788 torr and 15◦C? Water’s partial pressure at 15◦C is 12.8 torr.

Answer in units of mL.

5. /tmp/405-14764567889603512-6231-39416.dvi

Two gases are contained in gas bulbs con- nected by a valve. Gas A is present in a 1 liter bulb at a pressure of 842 torr. Gas B ex- erts a pressure of 474 torr in a 1 liter bulb. The valve is opened and the two gases equili- brate. What is the partial pressure of gas A expressed after equilibration?

Answer in units of torr. /tmp/405-14764567889603512-6231-39416.dvi

Two gases are contained in gas bulbs con- nected by a valve. Gas A is present in a 1 liter bulb at a pressure of 842 torr. Gas B ex- erts a pressure of 474 torr in a 1 liter bulb. The valve is opened and the two gases equili- brate. What is the partial pressure of gas A expressed after equilibration?

Answer in units of torr.

6. /tmp/405-14764567889603512-6231-39416.dvi

A 6.9 L sample of a gas was collected over wa- ter on a day when the temperature was 24◦C and the barometric pressure was 706 torr. The dry sample of gas had a mass of 5.6 grams. What is the mass of three moles of the dry gas? At 24◦C the vapor pressure of water is 22 torr.

Answer in units of g.

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"