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Chemistry Lab Rules

Division B + C

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Chemistry Lab Practice

Problem Settings

Molar Mass Calculator

Common Molar Masses
H2O = 18.02 g/mol CO2 = 44.01 g/mol NaCl = 58.44 g/mol HCl = 36.46 g/mol H2SO4 = 98.08 g/mol NaOH = 40.00 g/mol CaCO3 = 100.09 g/mol NH3 = 17.03 g/mol CH4 = 16.04 g/mol C6H12O6 = 180.16 g/mol

Quick Reference

Stoichiometry Steps

  1. Balance the equation
  2. Convert given mass to moles
  3. Use mole ratio from balanced equation
  4. Convert moles to desired unit

Key Formulas

Moles: n = mass / molar mass

Percent Yield: (actual / theoretical) x 100

Half-life: remaining = initial / 2^n

Rate Law: Rate = k[A]^m[B]^n

Quiz Mode

Quiz Settings

Practice Tips

  • Stoichiometry: Always start by identifying what you're given and what you need to find. The mole ratio is your bridge.
  • Limiting Reagent: Calculate moles of each reactant, then determine which runs out first based on stoichiometry.
  • Percent Yield: First calculate the theoretical yield, then compare to actual yield.
  • Kinetics: For rate law problems, compare experiments where only one concentration changes to find each order.