Which of the following is a necessary product of a combustion reaction? A. A precipitate
B. Heat
C. A hydrocarbon
D. Oxygen

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.