Answers: 1
Chemistry, 21.06.2019 16:30
How does decreasing the gas volume affect the pressure of a gas?
Answers: 1
Chemistry, 21.06.2019 18:40
Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reactants. consider 1 mole of tritium plus 1 mole of deuterium to be a mole of “reactions” (total molar mass = 5 grams).
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 14:30
The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as
Answers: 2
Which statement correctly describes measuring with a graduated cylinder?...
Computers and Technology, 24.07.2019 14:00
Social Studies, 24.07.2019 14:00
Mathematics, 24.07.2019 14:00
Health, 24.07.2019 14:00
Health, 24.07.2019 14:00
Biology, 24.07.2019 14:00
Biology, 24.07.2019 14:00
Social Studies, 24.07.2019 14:00
Social Studies, 24.07.2019 14:00
Biology, 24.07.2019 14:00