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4 years ago

Which element(s) are not balanced in this equation?

Chemistry

2 answers:

zhenek [66]4 years ago

8 0

The correct response would be A. Only the Fe is unbalanced, all of the other elements are balanced.

IRINA_888 [86]4 years ago

6 0

Check every element at both sides

Element left side right side conclusion

Fe 2 1 not balanced
O 3+3=6 3*2=6 balanced
C 3 3 balanced

Answer: only Fe is unbalanced (2 atoms at the left side and 1 atom at the right side)

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A chemistry teacher is able to grade chemistry labs at a rate of 5 labs for every 3 minutes. They need to grade 165 labs how man

PIT_PIT [208]

Answer:

1.65hr

Explanation:

Given parameters:

Number of labs = 5 labs

Time taken = 3 minutes

Unknown:

Time taken in hours to grade 165 labs = ?

Solution:

Let us find the rate of the teacher;

Rate = $\frac{number of labs}{time}$

Insert the parameters and solve;

Rate = $\frac{5}{3}$ = 1.67labs/min

Now;

Time to grade 165 labs = $\frac{number of labs}{rate}$

Time to grade 165 labs = $\frac{165}{1.67}$ = 98.8min

Since;

60min = 1hr

98.8min = $\frac{98.8}{60}$ = 1.65hr

3 0

3 years ago

Can someone please explain core and valence electrons in periods for me please

Lena [83]

Answer:

The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels

Explanation:

i hope u get it :))

6 0

3 years ago

What is true about energy?

xeze [42]

The correct answer is option A. Energy cannot be created during an ordinary chemical reaction. There is no such thing as an ordinary chemical reaction. Energy cannot be created or destroyed this is according to the law of conservation of energy. It can only be transformed from one form to another form.

7 0

3 years ago

Read 2 more answers

When a book sits on a shelf, what force (If Any) does the shelf exert on the book?

Bad White [126]

I'm pretty sure its the weight of the book

3 0

3 years ago

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draw two lewis structures for a compound with the formula c4h10 . no atom bears a charge, and all carbon atoms have complete oct

I am Lyosha [343]

The number of sigma bonds = 5, and number of pi bonds = 3 in the given compound. Shown in attachment are the two Lewis structures of the compound with molecular formula C4H10. The two structures are the isomers of each other.

Butane is an alkane represented by C4H10. All the bonds in this situation are single bonds because this substance is an alkane. Two shared electrons are present in every bond.

Each carbon atom requires 8 electrons around it in order to follow the Octet Rule. The octet rule was completed by the hydrogen bonds, eliminating the need for the electron dots.

Straight-chained butane is the first structure. The y-chained isobutane is the second structure.

To know more about Lewis theory visit : brainly.com/question/1179291

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8 0

2 years ago