I need help ASAP don't send me links please Which of the following reaction energy changes represents the highest energy released to the surroundings?
Reaction energy change = -456 kJ/mol
Reaction energy change = +547 kJ/mol
Reaction energy change = -38 kJ/mol
Reaction energy change = +1456 kJ/mol

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m