You perform a combustion analysis on a 255mg sample of a substance that contains only C, H, and O and you find that 561 mg of Co2 is produced along with 306 mg of h20. What is the empirical formula

An unknown solution has a ph of 8. How would you classify this solution? Acidic There is not enough information to answer the question Neutral Basic

Which of the following would be an asset? O a Ob OC Od the home you rent the car you own the car you are making payments on the home you are making payments on

Why are concentration units of mole fraction used in some colligative properties calculations? a. Mole fraction expresses concentration more accurately than molarity. b. Mole fraction does not depend on the chemical identity of the solute. c.

Is air a element, compoud, or mixture.

The average kinetic energy of the particles in a gas A. is not affected by the temperature of the substance. B. increases as the temperature of the substance decreases. C. is proportional to the temperature of the substance. D.

What is the mass number of an ion with 107 electrons, 157 neutrons, and a 1 charge?

Which of the following is true about compounds

According to the chart, which substance has the lowest OH' concentration? A) urine lemon juice tomato juice D) black coffee

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell? (1) oxidation (3) neutralization (2) reduction (4) transmutation

Which of the following is true? A) Gas atoms subjected to electricity emit bright lines of light. B) Gas atoms absorb white and emit a continuous spectrum of light. C) Gas atoms under high pressure emit dark lines against a continuous spectrum.