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Stoichiometry 25: Calculate the mass of anhydrous Na₂CO₃ in 500 mL of 0.1 M solution
Introduction To begin with, if you’re preparing a sodium carbonate solution for a chemistry experiment. You need to prepare 500 mL of…
Stoichiometry 24: How many moles of MgCl₂ are produced by reacting 150 g of MgCO₃ with excess HCl?
Let’s say you’re working in a chemistry lab or running calculations for a manufacturing plant. You have magnesium carbonate (MgCO₃) and a…
Stoichiometry 3: Finding the number of moles of water produced when 5 moles of hydrogen react with excess oxygen
Let’s clear up a question that feels too easy to be tricky You’re given 5 moles of hydrogen and excess oxygen. The…
Stoichiometry 26: How many moles of metal X react with 20 g of oxygen in forming X₂O₃?
Imagine this: You’re handed a compound where an unknown metal, simply called “X,” reacts with oxygen to form X₂O₃. Your job? Figure…
Stoichiochemistry 16: How Many Hydrogen Atoms Are Present in 50 Molecules of C₄H₄S₂?
Introduction Picture this: you’re handed a single compound, and the question isn’t how much it weighs or how many grams are involved—but…
Stoichiometry 6: Finding the number of moles of water produced when 2 moles of oxygen react with excess hydrogen
IntroductionHere’s a practical thought:Every time a car engine burns fuel, water is produced as a byproduct. Similarly, many industrial chemical reactions also…
Stoichiometry 29: What is the mass of X₂O₃ formed from 20 grams of oxygen and excess metal X?
Introduction Stoichiometry lets you move from what you have in the laboratory to what you can actually create. In this problem, you…
Stoichiometry 28: What is the mass of oxygen that combines with 0.83 moles of metal X to form X₂O₃?
Introduction Stoichiometry bridges the gap between the atomic world and what we can measure in the lab. When a metal reacts with…
Stoichiometry 15: How Many Atoms of Neon Are There in 0.55 Moles of Ne?
IntroductionEver wondered how scientists count atoms—something so tiny you can’t even see them with a microscope? Well, they don’t actually count them…