Many fuels, such as gasoline and diesel fuel, are hydrocarbons. hydrocarbons are molecules that contain only hydrogen and carbon. choose all of the criteria below that would make a hydrocarbon a good fuel in terms of enthalpy. hydrocarbons burn to absorb a large amount of energy. burning hydrocarbons produces a lot of energy. breaking carbon-hydrogen and carbon-carbon bonds gives off energy. the enthalpy of combustion is a large negative value.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .