A 2.5 mg sample of magnesium powder is ignited with 2 mg oxygen in a sealed container. All of the magnesium is consumed and 4.15 mg of white solid magnesium oxide is formed.

Find the mass of the unreacted oxygen

A gas that has a volume of 28 liters, a temperature of 45 0 C, and an unknown pressure has its volume increased to 34 liters and its temperature decreased to 35 0 C. If I measure the pressure after the change to be 2.

What instrument is used to measure the mass of different isotopes of an element? Mass Spectrometer I. R. Spectrometer

What is the cost of carbon in gram

What are the two primary chemicals involved in the formation of acid rain

How is E related to a period of elements? 1) E generally increases from right to left. 2) E generally decreases from right to left. 3) E is constant within any given Period.

How do ionization energies provide evidence for the quantization of the energies of electrons?

What causes lightning? a) thunder b) an electric discharge c) rising warm air d) air masses meeting

In a problem, you are given two pressures and one temperature at constant volume and amount of gas. You are asked to find a second temperature. What law should you use?

How many cups are in a 5-lb. bag of flour?

How is oxygen separated from other substances nearby?