50 points if its right In the Northern Hemisphere, choose ALL that apply Question 2 options:

Summer solstice occurs when the Earth's North Pole is tilted toward the sun.

Fall and Spring Equinoxes occur when days and nights are equal in length.

The tilt and revolution of the Earth causes the seasons

Winter solstice occurs when the Earth's North Pole is tilted away from the sun.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon