Which day of the year has the shotest period of day light in the northern hemesphiere
A. the spring equinox
B. the summer solstice
C. the fall equinox
D. the winter solstice

How many moles are equivalent to 55.5g of nano3

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

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?