Calculate the quantity of energy produced per gram of reactant for the fusion of HH-3 (atomic mass = 3.016049 amuamu) with HH-1 (atomic mass =1.007825 amuamu) to form HeHe-4 (atomic mass = 4.002603 amuamu). (31H+11H→42He13H+11H→24He) Express your answer using five significant figures.

The electron configurations of two different atoms are shown below. each yellow electron has a charge of 1−, and the net charge of each nucleus is shown. these atoms will combine with bond. a. an ionic b. a positive c. a negative d. a covalent plzzz mee with !

What substance has a mass of 9.5g and volume of 2.1cm^3

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.