How many molecules are in 7.90 moles of CH4?

1.31 x 10-23 molecules

7.62 x 1022 molecules

4.76 x 1024 molecules

2.30 x 1025 molecules

Which interaction is responsible for the force of attraction between the particles in a salt crystal? A. proton-proton B. proton-electron C. neutron-electron D. electron-electron

What is pH? A) the concentration of potassium ions in a solution B) how basic a solution is C) how acidic a solution is D) the concentration of hydrogen ions in a solution

2. The scientific method is like a razor that seperates what?

What is the mass of silver in 3.4 g AgNo3?

True or false. Positively charged objects attract other positively charged objects.

Which equation obeys the law of conservation of mass? H2 (g) + O2 (g) → H2O (g) H2 (g) + O2 (g) → H2O (g) + 4He (g) 2H2 (g) + O2 (g) → 2H2O (g) H2 (g) → H2O (g) H2 (g) + O2 (g) → 2H2O (g)

Which statement is true about sodium chloride (NaCl) ? It is a salt because it decreases the concentration of metallic ions. It is an acid because it is formed by the reaction of a salt and an acid.

After pyruvate oxidation, the chemical energy of how many carbons of the original glucose molecule is converted to chemical energy in the form of atp in the remaining steps of cellular respiration?

What do you call all elements that are clearly not metals? ? nonmetals ? metalloids

Which of the slightly soluble salts below will be more soluble in acidic solution than in pure water? a. Mg (OH) 2 b. CaCO3 c. AgCl Mg (OH) 2 d. only Mg (OH) 2, e. CaCO3, and f. AgCl g. CaCO3 only h. both Mg (OH) 2 and CaCO3