State three reason why do you think air is a mixture and water a compound?

Which equation was used by Albert Einstein to explain the photoelectric effect?

12. The Action of Phospholipases The venom of the Eastern diamondback rattler and the Indian cobra contains phospholipase A2, which catalyzes the hydrolysis of fatty acids at the C-2 position of glycerophospholipids.

If 7.50 g of the unknown compound contained 0.250 mol of c and 0.500 mol of h, how many moles of oxygen, o, were in the sample?

Organic hydrogenation reactions, in which H₂ and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C₂H₄) and H₂ form ethane (C₂H₆).

Which of the following can lower the activation energy of a system? A. density B. catalysts C. temperature D. concentration

A metal in group 2 of the periodic table can become a chemically stable ion by A. gaining one electron. B. losing one electron. C. gaining two electrons. D. losing two electrons.

Which of the following is not a part of Dalton's atomic theory? A. All elements are composed of atoms. B. Atoms of the same element are alike. C. Atoms are always in motion. D. Atoms that combine do so in simple whole-number ratios.

If an object has a mass of 20 kg and an acceleration of 15 m/s what would be the amount of force in Newton's acting on the object

The what form acidic compounds with hydrogen

Is comets greater than asteroids