## Which one of the following gas samples has the highest volume at STP

Helium

**Which has maximum volume of STP? **

It is obvious that 8 moles (or more) of H have the largest volume at STP. Option A, 8 mole H, is the best option. Notice: This is the standard molar volume for any gas at STP.

**What volume of oxygen at STP can be produced? **

8. 25 litres

### What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene?

9.6 kg

**What is the weight of air required for the complete combustion of 2.8 kg of ethylene assume that air contains 25% oxygen by mass? **

0.028 kg (Molar mass of ethylene) needs 3 x 0. 032=0. 096 kg of oxygen. 0.25 kg of ethylene is required (0. 096/0.028)=3. 42 kg of oxygen. This means that 2.8kg of ethylene is required (3. 42 x 2.8)=9.6 kg of oxygen.

**What is the molar mass of oxygen? **

15. 999 u

#### What mass of oxygen is required in the complete combustion of 450 grams of ethane?

The amount of oxygen needed to complete the combustion of 3 kg ethane is. (1) 11.2 kg.

**What mass of oxygen is consumed by the complete combustion of 21.0 grams of ethylene? **

28. 054 g

**When 100g of ethylene polymerizes to polythene according to the equation? **

when 100 g of ethylene polymerises entirely to polythene, the weight of polythene formed as per equation nCH2=CH2 -> (CH2 – CH2)n is. singhalvishi27 is waiting for your help. Earn points by answering the question.

## When 100g of ethylene Polymerises entirely to Polyethene the weight of Polyethene formed as per the equation?

When 100 g of ethylene polymerises entirely to polyethene, the weight of polyethene formed as per the equation, nCH2=CH2-(CH2-CH2)n is 100 g, because entire mass of ethylene is converted to polyethylene as there is no addition, elimination or condensation of simple molecules.

**How many Litres of oxygen at STP is required for complete combustion? **

4 litres=84 litres.