A mixture in which you can see the different parts

How many atm are in 1,520 mmHg?

Helium has an atomic number of 2 and atomic mass of 4. explain.

Which of these statements regarding enzymes is FALSE? a. Enzymes work best at a particuluar pH and temperature. b. Enzymes display specificity for certain molecules on which they will work. c. Enzymes are proteins that function as catalysts. d.

2.58 For each element, give the following information: [1] total number of electrons; [2] group number; [3] number of valence electrons; [4] period; [5] number of the valence shell. a. oxygen b. sodium C. phosphorus

How many protons and electrons are present in O²⁻? a) 8 protons and 8 electrons b) 10 protons and 8 electrons c) 8 protons and 10 electrons d) 16 protons and 8 electrons e) none of the above

Calculate the formula mass of ethanol, c2h5oh. express your answer to three significant figures and include the appropriate units.

What are the four classifications of matter? of those four, which two are pure substances?

Which relationship or statement best describes delta s for the following reaction: 2H2S (g) + 3O2 (g) - -> 2H2O (g) a) Delta S = 0 b) Delta S < 0 c) Delta S> 0 d) Delta S = Delta H |T e) More information is needed to make a reasonable prediction.

Which of the following subatomic particles are found outside of the nucleus?

How many atoms does a molecule of sodium chloride contain?