Aballoon is filled with 6.5 l of helium gas at 25oc and 1.0 atm. what volume will the balloon have when the temperature is lowered to -25oc and the pressure is increased to 1.5 atm?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver