1. An 1875 watt hair dryer has a resistance of 8.3 2 and a capacity of 15 amps. If 110 V of electricity is delivered to the hairdryer is the hairdryer operating at its fullest capacity? Explain your answer and support your answer with mathematical evidence.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5