A balloon inflated in a room at 290°C has a volume of 7.00L. The balloon is then heated to a temperature of 545 °C. What is the new volume if the pressure remains constant?

Who is better, messi or cristiano, i need this for a chemistry class. asap

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it