Scientists have discovered a new virus that is very different from any known viruses. What type of matter is the virus most likely made of? Combination of protons of some atoms that have not been discovered so far
Combination of protons of different atoms that exist in the periodic table
Compounds made from elements that are not in the periodic table
Compounds made by bonding of atoms of known elements

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane