4. One mole of oxygen contains 6.02 x 10% molecules. How many oxygen molecules are in 5.55 mnoles of oxygen gas?
10-3

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.