Traveling at 55 miles/hours, how many minutes will it take to drive 125 miles to Waco

Which example is a mechanical wave?     a.microwave    b.radio wave    c.water wave    d.ultraviolet light

Nh4no3 n2o + 2h2o a chemist who is performing this reaction starts with 160.1 g of nh4no3. the molar mass of nh4no3 is 80.03 g/mol; the molar mass of water (h2o) is 18.01 g/mol. what mass, in grams, of h2o is produced?

Astudent measured the ph for four solutions which ph indicated the lowest hydronium ion or concentration