Reaction of halide salt with silver nitrate salt reaction with agno3 naf clear liquid nacl white solid kbr yellow solid kl tan solid during chemistry lab, carl and his lab partner, mary, mixed four halide salts, one at a time, with silver nitrate. mary commented that all but one salt reacted chemically with the silver nitrate. carl asked her how she knew that a chemical reaction had occurred. what was mary's response based on evidence in this activity? a) a gas formed. b) a precipitate formed. c) the silver nitrate disappeared. d) an exothermic reaction took place.

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

To a of 4 x hz is 1. 0. mm nm nm