Why would the percent yield of a reaction not be 100% ? give reasons for your answer.

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Find the mass, in grams, of 5.00*10^23 molecules of f2

Need asap question 1 minerals are organic compounds. true false question 2 what vitamin can be found in foods like oranges, grapefruits, and broccoli? a. vitamin a b. vitamin k c.vitamin c d. vitamin d question 3 what are minerals? a. chemical elements that are needed for body processes. b. organic compounds that the body needs in small amounts to function properly. c. small molecules used to build proteins. d. an organic compound that is insoluble in water and includes fats. question 4 how many types of vitamins does the human body need? a. 15 b. 11 c. 13 d. 17 question 5 vitamins are a good source of energy. true false