Apiece of iron (cp = 0.450 j/(gi°c)) that has a mass of 21.5 g and an initial temperature of 100.0°c is submerged in x g of water (cp = 4.184 j/(gi°c)) at 20.0°c. the temperature of the system (iron and water) changes to 21.4°c. what is the value of x? a. 041 g. b. 80 g. c. 132 g. d. 574 g

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.