Question 2. (14 mks) Copper(I) oxide catalyses the decomposition of hydrogen peroxide. 0.5 g of the oxide was added to a flask containing 100 cm3 of hydrogen peroxide solution. A gas was released. It was collected, and its volume noted every 10 seconds. This table shows the results: fumes 0 10 20 30 40 50 60 70 80 90 Volume/cm3 0 18 30 40 48 53 57 58 58 58 draw a diagram of suitable apparatus for this experiment​

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

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!

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~ trueboss72