PLEASE HELP ASAP!! How much energy is needed to raise the temperature of 40.0 g of argon from 25
degrees C to 40 degrees C? The specific heat capacity of argon is 0.520 J/(g-K).
208 J
20.8 J
312 J
0416J

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 4.20 mol fe and 6.70 mol nio(oh) react?