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

Define calories and how the body gets energy

look carefully at the marked physiographic ocean chart. are the locations of earthquakes and volcanoes randomly scattered over the earth or do they seem to be more concentrated in certain areas. Explian your reasoning.

Why do elements form compounds

What is the change in enthalpy of the first reaction below, given the enthalpies of the other two reactions? 2NO (g) + O2 (g) + 2NO2 (g) N, (8) + O2 (g) → NO (g) N, (8) + O2 (g) + NO2 (g) AH = 90 kJ/mol AH° = 34 kJ/mol A. 56 kJ B. - 112 kJ C.

What keeps the electrons from leaving an atom in the rutherford model of the atom?

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.