What is the change in internal energy ( ΔU ) of the system if q = –8 kJ and w = –1 kJ for a certain process? a. -7 kJ
b. 9 kJ
c. 7 kJ
d. -9 kJ
e. -8 kJ

How many ions that have a +1 charge will bond with an ion that has a -2 charge

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

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