Quiz Arena __Chemistry Quiz

What is the smallest particle of an element that can exist or enter into chemical combination?

• Molecule

• Atom

• Compound

• Ion

Which of the following is a positively charged ion?

• Cation

• Anion

• Molecule

• Element

What is the empirical formula of a compound?

• The formula for gases only

• The formula for ionic compounds only

• The formula showing the exact number of atoms

• The simplest formula representing its composition

What is the molar mass of water (H2O)?

• 20 g/mol

• 16 g/mol

• 18 g/mol

• 22 g/mol

Which of the following is a method for balancing chemical equations?

• Trial and error

• Using coefficients

• Ignoring the products

• Using only one side

What is the mole fraction of a component in a solution?

• The percentage of the component in the solution

• The volume of the component divided by the total volume

• The mass of the component divided by the total mass

• The number of moles of the component divided by the total moles

What is the theoretical yield in a chemical reaction?

• The amount of reactants used

• The amount of excess reactants

• The actual amount of product obtained

• The maximum amount of product that can be formed

What is the purpose of titrimetric analysis?

• To calculate the volume of gases

• To analyze the color of solutions

• To measure the mass of a solid

• To determine the concentration of a solution

What is the formula for calculating percent composition by mass?

• Mass of solvent / Total mass of compound x 100%

• Mass of element in compound / Total mass of compound x 100%

• Total mass of compound / Mass of element x 100%

• Mass of element in compound / Mass of solvent x 100%

What is the molarity of a solution?

• Moles of solute per liter of solution

• Mass of solute per volume of solvent

• Mass of solute per liter of solution

• Moles of solute per mass of solution