A balloon contains 1000L of gas at 50oC and 101kPa, rises to an altitude where pressure is 50.5kPa and temperature is 10oC. The volume of the balloon at the new conditions would be?

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.