Which of the following are major influences on weather and climate? i. the cycling of water in and out of the atmosphere ii. the physical weathering of rocks and soil iii. uneven heating of the earth by the sun's energy iv. global patterns of atmospheric movement a. i, iii, and iv only b. i, ii, and iv only. c. i, ii, and iii only d. ii, iii, and iv only

A. I, III, and IV only

Explanation:

The cycling of water in and out of the atmosphere is an important determinant of weather and climate. Changes in humidity and average rainfall usually depend on this factor.

Uneven heating of the earth by the sun also creates unique patterns of changes in weather and climatic conditions around the world.

Global patterns of atmospheric movement affect parameters such as wind speed etc.

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.