The combustion of 10.0 g of an unknown chemical with molar mass = 35.56 g/mol, raises the temperature of 600 mL of water by 25oC. Assuming all the energy released by the reaction is absorbed only by the water, determine the ∆Hcomb of Mg. Note: specific heat capacity H20 = 4.18 J/goC

Your answer should follow the format:

a) q of the water

b) mols of unknown materials

c) ΔHcomb of unknown material with units (2 marks)

1 a

2 d

3 a

4 c

explanation:

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72