Molecules involved in a chemical reaction must meet to react. What is this concept called?

Enthalpy

Collision theory

Enthropy

Reaction rate

Explain how valence electrons are involved in ionic and metallic bonding

What is the mass of a sample of NH3 containing 6.3 * 1024 molecules of NH3? 157 grams 178 grams 182 grams 198 grams

A beaker contains 100.0 mL of a 0.100 M solution of sulfuric acid. When 100.0 mL water is added to this solution, what is the concentration of the diluted sulfuric acid?

How many valence electrons does a sulfate (S04-2) ion contain? 30 32 24

Question 2 Unsaved Which of the following chemical formulas shows a covalent compound? a) CO2 b) MgO c) NaCl d) HBr

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission

Which of these is the main goal of any titration? to observe the effect of indicators on acids to observe the effect of indicators on bases --> (((to determine the concentration of one of the reactants))) <--- to determine the effects of a base on

How can a sea cave become a sea arch?

Where do the elements in the human body tend to be located on the table

What kind of energy can be lost in a system?