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Limiting Reagent

Q. Nitrogen and hydrogen gas react to form ammonia according to the reaction: N2(g) + 3 H2(g) → 2NH3(g) If a flask contains a mixture of reactants represented by the image on the right, which image below best represents the mixture in the flask after have reacted as completely as possible?

Solved • Mar 10, 2020

Physical & Chemical Changes

Q. Which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? Drag the appropriate items to their respective bins.

Solved • Mar 10, 2020

Limiting Reagent

Q. Mining companies use this reaction to obtain iron from ore: Fe2O3(s)+3CO(g) → 2Fe(s)+3CO2(g) The reaction of 187 g of Fe2O3 with 85.5 g of CO produces 74.0 g of Fe. Identify the limiting reactant, a) Fe2O3 b) CO

Solved • Mar 10, 2020

Physical & Chemical Changes

Q. Classify each of the following changes as physical or chemical. Drag the appropriate items to their respective bins.

Solved • Mar 10, 2020

Balancing Chemical Equations

Q. Enter a balanced chemical equation for the reaction between gaseous hydrogen and fluorine gas. Express your answer as a chemical equation. Identify all of the phases in your answer.

Solved • Mar 10, 2020

Balancing Chemical Equations

Q. Enter a balanced chemical equation for the reaction between potassium metal and liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer.

Solved • Mar 10, 2020

Balancing Chemical Equations

Q. Consider the generic chemical equation A + 3 B → 2 C. Let circles represent molecules of A, squares represent molecules of B, and triangles represent molecules of C. The diagram below represents the amount of B available for reaction. Choose a similar diagram showing the amount of C that forms if B completely reacts.

Solved • Mar 10, 2020