Chemistry Tutoring / All levels / High School / College

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New study session. Thermochemistry.

Solving combustion mystery.

CHEMISTRY CHALLENGE 3
Join us in our weekly Chemistry Challenge with Chemistry All Levels Tutoring. Post your answers in comments and be ready to discuss!

200 g of water at 20 °C and 100 g of ice at 0 °C are placed in a thermostat. What is the temperature of the system after equilibration?
Heat capacity of water 4.186 J /g°C, heat of fusion of water 333 J/g.

CHEMISTRY CHALLENGE 2
Join us in our weekly Chemistry Challenge with Chemistry All Levels Tutoring. Post your answers in comments and be ready to discuss!

Study session in progress. Masses, volumes, moles...

Thank you everyone for participating. Before we go with the new round of problems, please try to solve two remaining puzzles from this week's assignment:

1) Please try to draw the correct mass spectrum of H2^17O showing the positions and intensities of all peaks. Assume only ionization without the decomposition.This question is very similar to what I gave my students at NYUAD. Post your original drawings here.
2) What is the correct empirical formula for (c)?

Study session in progress. Discussing solutions stoichiometry (High School AP Chemistry course).