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BabaBlast [244]
3 years ago
11

Select all the items on the following list that are ions.

Chemistry
2 answers:
Ratling [72]3 years ago
7 0

anything with plus or minus on them are ions
so that is 4 of them
po4-3
hco3-
al+3
hg2+2
Ad libitum [116K]3 years ago
3 0

Explanation:

Ions are the species that contain either a positive or negative charge.

For example, PO^{3-}_{4}, Al^{3+}, Hg^{2+}_{2}, HCO^{3-} are all ions.

Whereas when two or more different atoms are bonded together then the product formed is known as a compound.

For example, Na_{2}CO_{3} is a compound.

On the other hand, species that do not contain any charge are known as neutral species.

For example, fe, Zn, Cu are all neutral atoms.

Thus, we can conclude that items which represent the ions are as follows.

PO^{3-}_{4}, HCO^{3-}, Al^{3+}, and Hg^{2+}_{2}

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Coke is an impure form of carbon that is often used in the in- dustrial production of metals from their oxides. If a sample of c
steposvetlana [31]

Answer:

The mass of coke needed to react completely with 1.0 ton of copper(II) oxide is 0.794 Ton.

Explanation:

2CuO+C\rightarrow 2Cu+CO_2

1 Ton = 907185 grams

Mass of copper oxide = 1.0 Ton = 907185 grams

Moles of copper oxide =\frac{907185 g}{79.55 g/mol}=11,403.95 moles

According to reaction, 2 moles of copper oxide reacts with 1 mole of carbon.

Then 11403.95 moles of copper oxide will react with:

\frac{1}{2}\times 11403.95 mol=5,701.98 mol of carbon

Mass of 5,701.98 moles of carbon:

5,701.98 mol\times 12 g/mol=68,423.75 g

Mass of coke = x

Mass of carbon = 68,423.75 g

Percentage of carbon in coke = 95%

95\%=\frac{68,423.75 g}{x}\times 100

x=720,250.09 g=0.794 Ton

The mass of coke needed to react completely with 1.0 ton of copper(II) oxide is 0.794 Ton.

3 0
3 years ago
To name the compound written as CuCl2, you would write:
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Answer: option C. Copper (II) chloride

Explanation:

To name CuCl2, we need to know the oxidation state of Cu in the compound as chlorine always have oxidation on —1 in all its compound. The oxidation state of Cu can be calculated as follows:

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Cl = —1

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Cu —2 = 0

Collect like terms

Cu = 0 +2

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Therefore, the oxidation state of Cu in CuCl2 is +2.

The name of the compound will be copper(ii) chloride, since cupper has oxidation state +2 in the compound.

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