The answers are B B D D but an you explain why answer is the why it is? Use the
ID: 548841 • Letter: T
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The answers are B B D D but an you explain why answer is the why it is?
Use the periodic table below to answer the following questions. 23) Which elements commonly form anions? B) Cand D A) B and D C) A and C D) A and B 24) Which elements commonly form covalent bonds? 24) A) A and C B) Cand D C) B and ID D) A and B 25) Which statement is incorrect regarding reduction? 25) A) Reduction is a "gain" of electrons. B) Reduction is the loss of O atoms. C) Reduction is always accompanied by oxidation. D) Reduction is an increase in oxidation state. E) none of these 26) How many iron(I) ions, Fe2+ are there in 5.00 g of FesO4? A) 5.46 x 10-26 iron (II) ions C) 1.83 x 1025 iron (II) ions B) 4.58 x 1026 iron (II) ions D) 1.98 x 1022 iron (II) ionsExplanation / Answer
23)
Anion is formed by accepting electrons
C can form anion by accepting 3 electrons
D can form anion by accepting 2 electrons
Cation is formed by losing electrons
A can form cation by losing 1 electron
B can form cation by losing 2 electrons
Generally, left half form cation and right half of periodic table form anion
Answer: B
24)
Non metal form covalent bonds with themselves
Non metal are present in right part of periodic table
C and D are non metals and hence they form periodic table
A and B are metal and generally they form ionic bond
Answer: B
25)
Reduction is gain of electron or loss of oxygen or gain of hydrogen and it decreases the oxidation state
oxidation is loss of electron or gain of oxygen or loss of hydrogen and it increases the oxidation state
So, D is incorrect
Answer: D
26)
Molar mass of FeSO4,
MM = 1*MM(Fe) + 1*MM(S) + 4*MM(O)
= 1*55.85 + 1*32.07 + 4*16.0
= 151.92 g/mol
mass(FeSO4)= 5.00 g
we have below equation to be used:
number of mol of FeSO4,
n = mass of FeSO4/molar mass of FeSO4
=(5.0 g)/(151.92 g/mol)
= 3.291*10^-2 mol
This is number of moles of FeSO4
one mole of FeSO4 contains 1 moles of Fe2+
we have below equation to be used:
number of moles of Fe2+ = 1 * number of moles of FeSO4
= 1 * 3.291*10^-2
= 3.291*10^-2
number of ions of Fe2+ = number of mol * Avogadro’s number
= 3.291*10^-2 * 6.022*10^23
= 1.98*10^22
Answer: D
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