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4 years ago

In which of the following are the symbol and name for the ion given correctly

Chemistry

2 answers:

Alinara [238K]4 years ago

6 0

Answer:

This question is incomplete but the completed question is below

In which of the following are the symbol and name for the ion given correctly?

a. Fe2+: ferrous ion; Fe3+: ferric ion

b. Sn2+: stannic ion; Sn4+: stannous ion

c. Co2+: cobalt(II) ion; Co3+: cobaltous ion

d. Pb2+: lead ion; Pb4+: lead(IV) ion

The correct option is a

Explanation:

In this question, the knowledge of ion naming is been tested. Below, the ions and there correct names will be presented

Pb2+ is lead (II) ion

Pb4+ is lead (IV) ion

Co2+ is cobalt (II) ion and it is also called cobaltous ion

Co3+ is cobalt (III) ion

Sn2+ is tin (II) ion and it is also called stannous ion

Sn4+ is tin (IV) ion and it is also called stannic ion

Fe2+ is iron (II) ion and it is also called ferrous ion

Fe3+ is iron (III) ion and it is also called ferric ion

From the above, we can deduce that option a is the one that has it's symbol correctly attached to it's name

Ivenika [448]4 years ago

3 0

I don't see the symbols or the ions. sorry. can you type them out so I can help

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3 years ago

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3 years ago

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dybincka [34]

Answer:
1. $x=4$
2. $x=\frac{57}{7}$
3. $x=\frac{27.7}{11}$

Explanation:

Given the following questions:

$12=3x$
$7x=57$
$11x=27.7$

In order to find the answers to these questions, we have to recognize that in order to isolate the variable we need to divide on both sides.

Question one:
$12=3x$
$\frac{3x}{3} =\div3$
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$x=4$

Question two:
$7x=57$
$\frac{7x}{7} =\div7$
$57\div7=8.14285714=\frac{57}{7}$
$x=\frac{57}{7}$

Question three:
$11x=27.7$
$\frac{11x}{11} \div11$
$27.7\div11=2.51818182=\frac{27.7}{11}$
$x=\frac{27.7}{11}$

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3 years ago