Question

10.Convert -30°C into (a)kelvin (b)°F
[(a) 243K (b) 22°F] ​

Answer 1

22400 ml. of oxygen at 273 K temperature and 3-atm pressure = 22400 ×3/1= 67200 ml at STP.

So 224 ml of oxygen at 273 K and 3-atm = 224 ×3= 672 ml at STP

The number of Oxygen molecules present in 22400 ml of gas at STP=N

(where N= Avagadro Number)

Therefore 224 ml of oxygen at 273K and 3-atm pressure will contain =N×672/22400 × N molecules.

=3/100×6.022×10

23

=18.066×10

21

Molecules =1.8066×10

22

molecules

hope it helps you

Answer 2

Answer:

a) 30°c b) 251°c

Explanation:

243K - 273

=30 ° c

b) 273-22

=251