5. Base your answer to the question on the particle diagrams below, which show atoms and/or molecules in three different
samples of matter at STP.
Key
atom of x
atom of y
O atom of z
30
Sample 1 Sample 2 Sample 3
Which sample represents a pure substance?
1. Sample 1
2. Sample 2
3. Sample 3

Why is nh3 classified as a polar molecule

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form