During a chemistry lab experiment, Jay and Tamara are reacting magnesium with hydrochloric acid. Using the balanced equation

Mg(s) + 2 HCl(aq) --> MgCl₂(aq) + H₂(g)

How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?

Yami and Mohammad are conducting an experiment in their chemistry class. They use the balanced equation

Mg(s) + 2 HCl(aq) --> MgCl₂(aq) + H₂(g)

What is the mass in grams of H₂ gas when 4.0 moles of HCl is added to the reaction?

Alex and Logan are conducting an experiment in their chemistry class. They use the balanced equation

Mg(s) + 2 HCl(aq) --> MgCl₂(aq) + H₂(g)

How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

Eva and Jayden are conducting an experiment in their chemistry class. They need to balance the following reaction to complete their lab report:
 CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq). Can you help them balance the equation?

Jayden and Alex are working on a science project where they need to produce acetylene gas (C₂H₂) by reacting calcium carbide (CaC₂) with water. Using the balanced equation CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

how many grams of H₂O are needed if 3.20 moles of CaC₂ are consumed?

Albert and Kingston are working on a chemistry project. They are using the balanced equation

CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

to determine how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂. Can you help them find the answer?

Eva and Kingston are working on a chemistry project. They are using the balanced equation

CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

to produce acetylene gas. If they use 3.5 moles of H₂O, how many moles of Ca(OH)₂ will be produced?

Madeleine and Asher are conducting an experiment in their chemistry class. They need to balance the following reaction:  
C₂H₂(g) + O₂(g) --> CO₂(g) + H₂O(g)

Jayden and Cayden are conducting an experiment using the balanced equation

2 C₂H₂(g) + 5 O₂(g) --> 4 CO₂(g) + 2 H₂O(g)

How many moles of water (H₂O) are produced when 25.0 grams of C₂H₂ are consumed?

Ken and Jay are working on a science project where they need to decompose NaClO₃ (s)  to produce oxygen gas. The reaction is as follows: 2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g)  
If they start with 12.00 moles of NaClO₃, how many grams of O₂ will they produce?

Khloe and Ava are working on a chemistry project. They have a reaction where Cl₂ + 2KBr → Br₂ + 2KCl. If they start with 356 g of potassium bromide (KBr), how many grams of potassium chloride (KCl) can they produce?

Alex and Yami are working on a chemistry project. They have a sample of Fe₂O₃ weighing 150 grams. They want to know how many grams of H₂O will be produced when this sample reacts completely according to the equation: Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
About how many grams of H₂O will be produced? 

Jamyiah and Jumi are working on a chemistry project. They need to produce ammonia (NH₃) in the lab. The reaction they are using is: N₂ +  3H₂ −->  2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

Brandon is baking a cake and needs to convert 200 grams of sugar to moles to follow the recipe accurately. How should he do this conversion?

A and Kingston are working on a chemistry project. They use the following equation:
2NaOH(aq) + H₂SO₄(aq) --> 2H₂O(l) + Na₂SO₄(aq)
How many grams of sodium sulfate will be formed if they start with 200 grams of sodium hydroxide?

Mohammad and Jayden are conducting an experiment in their chemistry class. They decompose 2 KClO₃ to produce 2 KCl and 3 O₂.
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

 Eveyanna is working on a chemistry project and needs to add 8 moles of Carbon to the reaction: SiO₂ + 3C → SiC + 2CO. How many grams of Carbon should she weigh?

Zay and Kelsey are working on a chemistry project. They produced 151 grams of Al₂O₃ in their experiment. How many grams of Al did they need for the reaction? 4 Al + 3 O₂ -------> 2 Al₂O₃

Lauren and Madeleine are in a chemistry lab trying to figure out how much product they can make from a given amount of reactants. What is the first thing they must do to solve this stoichiometry problem?

Blake and Cameron are working on a chemistry project. They are reacting magnesium with iron(III) oxide. For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

Logan and Jamyiah are counting particles in their science experiment. They want to know how many particles are in a mole. How many particles should they count?

Kennadi and Jay are working on a science project where they need to produce water by combining hydrogen and oxygen. The reaction is given by:
2H₂   +   O₂  →  2H₂O
If they use 8 moles of H₂, how many moles of water can they produce?

Eveyanna and Jason are working on a chemistry project. They have 356 g of potassium bromide (KBr) and need to produce potassium chloride (KCl) using the reaction: Cl₂ + 2KBr → Br₂ + 2KCl. How many grams of potassium chloride (KCl) can they produce?

Blake and Albert are conducting an experiment in their chemistry class. They are burning methane (CH₄) to observe the combustion process. The reaction is as follows: CH₄ + 2 O₂ → CO₂ + 2 H₂O.
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

Blake and Kelsey are working on a science project where they need to calculate the amount of oxygen required for a chemical reaction. They have 36.1 g of B₂H₆ and need to know how much O₂ is needed to burn it completely according to the reaction: B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O. What mass of O₂ will be needed?

Jason and Alex are conducting an experiment in their chemistry class. They have 6.00 g of HCl and 5.00 g of Mg to form MgCl₂.
 
Mg +  2HCl --> MgCl₂  +  H₂   
 Identify the limiting reagent in their experiment.

Alex is preparing a saline solution for a science experiment. He needs to know how many grams are in 7.8 moles of NaCl to ensure the solution is accurate. How many grams are in 7.8 moles of NaCl?

Eleanor and Jayden are working on a chemistry project. They have the following reaction to produce iron:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can they make from  6 moles H₂? 

Jay and Kelsey are making sandwiches for a picnic. They need 2 pieces of bread, 1 tablespoon of peanut butter, and 2 tablespoons of jelly to make each sandwich.  If they have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, what is the limiting ingredient?

Tashonia and Elisha are working on a chemistry project where they need to calculate the molar mass of Fe₃(PO₄)₂. What is the molar mass of Fe₃(PO₄)₂?

Tamara and Ava are working on a science project where they need to produce glucose (C₆H₁₂O₆) through photosynthesis. The equation for the reaction is: 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂ 
What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

Brandon and Amaria are working on a chemistry project. They need to find a formula that represents the lowest whole # ratio of elements in a compound. What is this formula called?

Cayden and Jamyiah are working on a chemistry project. They need to identify the Empirical Formula for a compound they are studying. The compound is:

C₄H₆

Tamara and Blake are working on a chemistry project. They need to identify the Empirical Formula for a compound they are studying:

Br₂O₆

Madeleine and Yami are in a chemistry lab trying to determine the empirical formula of a compound. They have a sample of ethylene, which has the molecular formula C₂H₄. What is the empirical formula of ethylene?

When Tamara and Jumi reacted Na with Cl₂ in their chemistry lab, they calculated that the theoretical yield should be 12.5 grams. Their actual yield was 13.0 grams. What is the percent yield?

J and Alex are conducting an experiment in their chemistry class. They are observing the reaction: CH₄ + 2O₂ → CO₂ + 2H₂O

They added 24 grams of CH₄ to the reaction. Calculate the theoretical yield of CO₂ that they should expect.

Desimitch and Mohammad are working on a science project where they need to create phosphoric acid (H₃PO₄) by reacting phosphorus pentoxide (P₄O₁₀) with water (H₂O). In their experiment, they use the chemical equation: P₄O₁₀ + 6 H₂O --> 4 H₃PO₄. What is the mole ratio of H₂O to H₃PO₄ in this reaction?

Janet and Yami are working on a chemistry project where they need to determine the empirical formula of a compound. They have found the following percentages: 57.14%C, 6.16%H, 9.52%N, and 27.18% O. Help them find the empirical formula.

Tamara and Mya are working on a chemistry project. They are reacting aluminum with sulfuric acid to produce aluminum sulfate and hydrogen gas. The reaction is as follows: 2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂. How many grams of Al₂(SO₄)₃ would be formed if 250g H₂SO₄ completely reacted with aluminum?

Mya and Alex are working on a science project where they need to produce nitrogen monoxide (NO) using the following chemical reaction:
4 NH₃ + 5 O₂ --> 4 NO + 6 H₂O
They have 56.8 grams of ammonia (NH₃). How many grams of oxygen gas are needed to react with this amount of ammonia?

Cayden and Blake are conducting an experiment in their chemistry class. They react 4NH₃ + 5O₂ → 4NO + 6H₂O

How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?

Elisha and Alex are conducting an experiment in their chemistry class. They mix vinegar and baking soda in a closed container and observe the reaction. What principle explains why the mass of the container and its contents remains the same before and after the reaction?

In a classroom experiment, Mya and Jason are mixing different chemicals. Mya notices a large number in front of a chemical formula and asks Jason what it represents. What is a coefficient?

Branden and Zarria are conducting a science experiment. They mix iron (Fe) and sulfur (S) to form iron sulfide (FeS). What is the part of the chemical equation in green called? 
Fe + S --> FeS

Zarria and Kingston are in a chemistry class, and they are learning about chemical equations. Zarria asks Kingston, "What is the little number after an element in a chemical equation called?"
Example: H₂

Mohammad and Cameron are working on a science project where they need to balance chemical equations. They come across the equation: N₂+O₂--> _NO. What coefficient should they use to make the equation balanced?

The coefficient in 3H₂O is

What are the coefficients that would properly balance this equation?

__Ca + __H₂O --> __Ca(OH)₂ + __H₂

What are the coefficients that would properly balance this equation?

__H₂ + __S --> __H₂S

Balance the the following equation.

__Zn+__HCl -->__ZnCl₂ +__H₂