The volume of gas in a balloon is 1.90L at 21.0°C. The balloon is heated, causing it to expand to a volume of 5.70L. what is the new temperature of the gas inside the balloon?

The new temperature is .

Explanation:

Given: = 1.90 L,    

= 5.70 L,        

Formula used to calculate new temperature is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the new temperature is .

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)