Gold is one of the densest substance on earth. a gold bar that is 20cm by 5cm by 5 cm has a mass of 9kg. what is the density of gold?

1. Water is an amphoteric substance. In any sample of water some of the moles In any sample of water some of the molecules perform acid- base reactions with each other. This is called the autoionization of water.

Consider this reaction mechanism: Step 1: Mo (CO), Mo (CO) 3 + CO Step 2: Mo (CO) 3 + P (CH3) 3 + Mo (CO) P (CH3) 3 Which of these is an intermediate? o Mo (CO) 6 O Mo (CO) 5 о со o P (CH3) 3

Energy of particles increase or decrease

If lye, NaOH (s), is put in water, the solution gets hot. What kind of energy process is this?

Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What is the source of the nitro - gen and oxygen atoms?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal

Why is the use of natural gas as a full becoming more common

A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should she do to correct this situation? A. Add water. B. Add base. C. Add acid. D. Do nothing.

What type of rock is sandstone