An unknown substance undergoes a chemical change that gives off heat. What can you tell me about this substance?

A gas sample in a rigid container at 455 K is brought to STP (273K and 1 atm). What was the original pressure of the gas in mmHg

The teacher makes an argument to the class for why fire could be considered a living thing and then ask what is wrong with that argument. Tiana raises her hand and replies with one characteristic of life that fire does not have.

Why could I do for a science fair

Match the vitamin with its function. 1. Vitamin C A. nervous system 2. Vitamin A B. builds bones 3. Vitamin B C. night vision 4. Vitamin D D. resists infection 5. Vitamin E E. healthy cells

How many moles of nitrogen would react with excess hydrogen to produce 520 mL of ammonia? 0.0116mol 0.012mol 0.0232mol 0.024mol

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?

1. Why does CH30 evaporate faster than water?

How does concentration affect our daily lives in science?

How many nitrogen atoms are in 2.79 mo. of NH3

What is the chemical formula for polysaccharide?