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3 years ago

What is the molar mass of Fe(NO3)2?

Chemistry

1 answer:

motikmotik3 years ago

5 0

I believe that the molar mass is 342.34g/mol

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What is the oxidation of KCL?

Assoli18 [71]

Rules:

1) The oxidation number of a monatomic ion equals the charge of the ion.

2)The oxidation number of a Group 1 element in a compound is +1.

3) The oxidation number of a Group 17 element in a binary compound is -1.

4) The sum of the oxidation numbers of all the atoms in a neutral compound is 0.

KCl is an ionic compound. Consists of K+ ions and Cl- ions.

Oxidation of K= +1 (rules 1 and 2)

Oxidation of Cl= -1 (rules 1 and 3)

Rule 4 also applies- +1 + (-1)= 0- a neutral compound

Hope this helps :)

Explanation:

3 0

3 years ago

What is the difference between the crest and the trough of a wave?

Dominik [7]

Answer:

Trough is the lower bound of wave, while the crest is the upper bound of a wave.

Explanation:

see picture attatched

3 0

3 years ago

Please i need the answer for 18,19,20<br><br><br>Answer and I will give you brainiliest <br>

dezoksy [38]

Number 18 is correct, number 19 is the particles speed up and the substance expands, and number 20 is decrease in volume

8 0

3 years ago

7. The grid in a triode is kept negatively charged to prevent A. electrons from escaping from the tube containing the triode. B.

romanna [79]

Answer:

A. Electrons from escaping from the tube containing the triode.

Explanation:

5 0

3 years ago

Li + HNO3 > LiNO3 + H2 how do I balance it? Show work pls

azamat

Answer: The balanced equation is $2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}$ .

Explanation:

The given reaction equation is as follows.

$Li + HNO_{3} \rightarrow LiNO_{3} + H_{2}$

Number of atoms present on reactant side are as follows.

Li = 1
H = 1
$NO_{3}$ = 1

Number of atoms present on product side are as follows.

Li = 1
H = 2
$NO_{3}$ = 1

To balance this equation, multiply Li by 2 and $HNO_{3}$ by 2 on reactant side. Also, multiply $LiNO_{3}$ by 2 on product side.

Hence, the equation can be rewritten as follows.

$2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}$

Now, number of atoms present on reactant side are as follows.

Li = 2
H = 2
$NO_{3}$ = 2

Number of atoms present on product side are as follows.

Li = 2
H = 2
$NO_{3}$ = 2

As there are same number of atoms on both reactant and product side. Hence, the equation is now balanced.

Thus, we can conclude that the balanced equation is $2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}$ .

3 0

3 years ago