Advanced Chemistry Concepts Quiz

In a chemical reaction between aluminum and oxygen to form aluminum oxide, if you start with 4 moles of aluminum and 3 moles of oxygen, which is the limiting reactant?

• Aluminum

• Oxygen

• Aluminum oxide

• None, they are in perfect stoichiometric ratio

Tags

NGSS.HS-PS1-7

Explain how you would safely handle and dispose of a chemical spill in the laboratory.

• Use paper towels to absorb the spill and throw them in the trash.

• Neutralize the spill if it's an acid or base, then clean with appropriate materials and dispose of according to safety guidelines.

• Leave the spill and inform the next person to be careful.

• Use water to wash the spill down the drain.

Tags

NGSS.HS-ETS1-3

Calculate the theoretical yield of water produced when 2 moles of hydrogen gas react with 1 mole of oxygen gas.

• 1 mole

• 2 moles

• 3 moles

• 4 moles

Tags

NGSS.HS-PS1-7

During a flame test, a student observes a bright yellow flame. Which ion is most likely present in the sample?

• Potassium

• Sodium

• Calcium

• Copper

Explain the importance of understanding lab safety rules when conducting experiments involving volatile chemicals.

• To ensure experiments are completed quickly.

• To prevent accidents and ensure the safety of all individuals in the lab.

• To avoid wasting chemicals.

• To make the lab look organized.

• Carbon has a single bond with each oxygen.

• Carbon has a double bond with each oxygen.

• Carbon has a triple bond with one oxygen and a single bond with the other.

• Carbon has no bonds with oxygen.

Tags

NGSS.HS-PS1-1

• Sodium chloride, because sodium is a metal and chloride is a non-metal.

• Sodium chlorine, because it contains sodium and chlorine.

• Natrium chloride, using Latin names.

• Sodium dichloride, because it contains two elements.

Describe the strategic approach to determine the limiting reactant in a reaction between 5 grams of magnesium and 10 grams of hydrochloric acid.

• Calculate the moles of each reactant and compare their stoichiometric ratios.

• Use the mass of the reactants directly to determine the limiting reactant.

• Assume the reactant with the smaller mass is the limiting reactant.

• Use the reactant with the larger mass as the limiting reactant.

Tags

NGSS.HS-PS1-7

A student needs to measure 50 mL of a liquid accurately. Which piece of lab equipment should they use and why?

• A beaker, because it is easy to pour from.

• A graduated cylinder, because it provides more precise measurements.

• A test tube, because it is convenient.

• A flask, because it can hold more liquid.

In liquid chromatography, what is the strategic reason for choosing a specific mobile phase?

• To match the color of the sample.

• To ensure the sample dissolves completely.

• To optimize the separation of components based on their interactions with the stationary phase.

• To reduce the cost of the experiment.