Which element or elements are unbalanced in this equation?

Numbers with a end value of 4 or lower are rounded up, while with an end value of 5 or higher are rounded down. true or false?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

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?