6. A Solution sprerred by diss-winn ut is the empiric-1 (Simplest) t rmula. C3H8

Question

6. A Solution sprerred by diss-winn ut is the empiric-1 (Simplest) t rmula. C3H8 + 502- 3CO2 + 5H20 t volume of oxygen is needed to react with 3 L of C3HB? gas sample occupies a volume of 1000 mL at 40°C and a ure of 760 torr. If, at the same tempefature, the pressure 4A- e decreased to 380 torr, what volume would result? A) 500 mL B) 1000 mL C) 1500 mL D) 2000 mL 45. O H H H-C-C-C-0-H The above molecule contains which two functional groups? A) ketone and alcohol B) aldehyde and ester c) aldehyde and alcohol D) acid and alcohol

Explanation / Answer

43)

Answer

B) 15L

Explanation

At constant temperature and pressure, Volume of gas depends on volume

1mole of C3H8 require 5mole of O2

3mole of C3H8 require 15 mole of O2

Therefore,

3L of C3H8 require 15L of O2

44)

Answer

D) 2000ml

Explanation

According to ideal gas equation

PV=nRT

If volume and Pressure is variying

P1V1=nRT

P2V2 = nRT

P1V1 = P2V2

V2 = P1V1/P2

= 760torr * 1000ml/380torr

= 2000ml

45)

Answer

C) Aldehyd and alcohol

Explanation

-OH is alcohol group

- CHO is aldehyd group

5)

Answer

SO2

Explanation

Mole ratio of S = 50/32 = 1.563

Mole ratio of O = 50/16 = 3.125

If convert mole ratio to lowest whole by dividing both values by 1.563

Mole ratio of S = 1.563/1.563 = 1

Mole ratio of O=3.125/1.563= 2

Therefore,

Empirical formula is

SO2

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