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valentina_108 [34]
3 years ago
6

Which of the following elements would most likely form an ion with a +2 charge?

Chemistry
2 answers:
Harrizon [31]3 years ago
8 0

Answer:

The correct answer to this is Mg.

Explanation:

Mg is the second element at the Periodic Table, down Be. As its the oxidation number is 2, it can release two electrons to form compounds. Not like C that is tetravalent, or Na that is a monovalent element (1e-). Si, as C has 4 oxidation states, and phosphorus can lose or get 3 e- (for example PCl3), also get 5e- (for example  P2O5)

julsineya [31]3 years ago
7 0

Answer:

Mg

Explanation:

Magnesium has a valency of +2

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SO2+O2 SO3 how many moles of O2 needed to combust 100.0g of sulfur dioxide
Oksanka [162]

2SO2 + O2 ------> 2SO3


1) M(SO2)= 32.0 + 2*16.0 = 64 g/mol


2) 100.0 g SO2 * 1 mol SO2/64 g SO2 = 1.5625 mol SO2


3) 2SO2 + O2 ------> 2SO3

2 mol 1 mol

1.5625 mol x mol


x= 1.5625/2=0.78125 ≈ 0.7813 mol O2


Answer: 0.7813 mol O2.

6 0
3 years ago
H2O2
Stels [109]

Answer:

Total Ionic equation:

H₂²⁺(aq) + O₂²⁻(aq) + Mg²⁺(aq) + SO₃²⁻(aq)   →   Mg²⁺(aq)+SO²⁻₄(aq) + H₂O(l)

Explanation:

Chemical equation:

H₂O₂(aq) + MgSO₃(aq)   →   MgSO₄(aq) + H₂O(l)

Balanced chemical equation:

H₂O₂(aq) + MgSO₃(aq)   →   MgSO₄(aq) + H₂O(l)

Total Ionic equation:

H₂²⁺(aq) + O₂²⁻(aq) + Mg²⁺(aq) + SO₃²⁻(aq)   →   Mg²⁺(aq)+SO²⁻₄(aq) + H₂O(l)

Water can not split into ions because it is present is liquid form.

7 0
3 years ago
1. Ba(OH)2<br> What is the compound
BabaBlast [244]

Answer:

BARIUM HYDROXIDE IS THE COMPOUND

7 0
4 years ago
A certain radionuclide is used to diagnose lymphoma. An atom of this radionuclide contains 31 protons and 36 neutrons. Which sta
Tasya [4]
The atomic number is the total number of protons in the nucleus. The mass number is the total number of particles in the nucleus. That includes the neutrons and the protons. So, the atomic number is 31. When you look at the element on the periodic table with a designated atomic number of 31, that would be Gallium, with a symbol of Ga. Mass number is 31 + 36 = 67. So, the answer is A.
5 0
4 years ago
Read 2 more answers
What is the overall cell potential for this redox reaction?
Zina [86]
Oxid  # :     0          0                   +2        -1

equation:Cl_{2}  +  Ni -----\ \textgreater \   Ni^{2+}  +  2Cl ^{-}

∴ the nickel was oxidized while chlorine was reduced

nickel reduction potential =  - 0.25 V
              but since it is being oxidised the you have to switch the integer sign so the 
              the potential of nickel in this case becomes + 0.25 V

chlorine was reduced thus its reduction potential remains same  = + 1.36 V

Overall Cell potential  =  ∑ of half cell potential

The overall cell potential  =  (+ 1.36) + (+ 0.25)
                                         =   + 1.61 V

∴ the answer would be D

4 0
3 years ago
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