what is the process of a substance that changes from a solid directly to a gas without becoming a liquid

Experiment:phase changes, what was the temperature of the ice before you added heat?

What is the correct way to write. 00095 in scientific notation

Assume that the potential energy of the products in a chemical reaction is 60 kilojoules. this reaction would be exothermic if the potential energy of the reactants were

A stock bottle of an acid reads: 56% by mass and 1.25 specific gravity. If the molar mass of the acid is 70g, find the mole per cubic decimeter

1. Which of the following pairs of atoms are isotopes? a) K-39 and K-40 c) C-12 and N-14 b) F-10 and Ne-10 d) H-2 and He-2

Evaluate - if you put a scale in an elevator and weigh yourself as you ascend and the descend, does the scale have the same reading in both instances?

Why would you add a catalyst to something

A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess oxygen. The temperature rose by 0.910 K. In a separate experiment in the same calorimeter, the combustion of 0.

the volume of an ideal gas in a container is 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K

Which of the Following Will result in increasing temperature of s gas