Jessica is measuring the amount of hydropower in a sustainable home. the first reading is 30 kilowatts (kw) and the second reading is 500 watts (w). what is the total amount of energy measured?     a30.5 kw  b35,000 w  c300,500 w  d305 kw

Can someone me with questions 12 and 13 plz.

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?

If you are told to get 100 ml of stock solution to use to prepare smaller size sample for an experiment, which piece of glassware would you use?