How many molecules are in 2.0 moles of molecular hydrogen? A) 6.0x1023 molecules H2 B) 2.0x1024 molecules H2 C) 3.0x1023 molecules H2 D) 1.2x1024 molecules H2

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

What layer of the atmosphere is directly above the troposphere?