During witch age range do most girls bodies begin to grow hair under there under arms select one of these options A. 5-9 b. 8-14 c. 15-18 d. 19-25 PLS HELP ASAP

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.