It takes more time to heat 100 liters of water than 10 liters of water because . the molecules are closer together in 100 liters than in 10 liters
the boiling point increases with an increase in volume
the boiling point decreases with a decrease in volume
there are more molecules to heat in 100 liters than in 10 liters

Answer; carbon monoxide (co);

The se-ci  bonds is more polar  than s-br bond

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.