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2 years ago

Complete the balancing of this equation ; which shows the reaction between iron and carbon :

Chemistry

1 answer:

rewona [7]2 years ago

5 0

The balanced equation is $Fe_{2} O_{3} + 3CO ---> 2Fe + 3CO_{2}$

<u>Explanation</u>:

$Fe_{2} O_{3} + 3CO ---> 2Fe + 3CO_{2}$

For solving this first of all you figure out the formula of iron(3)oxide so you look at the periodic table as you said valency of iron is 3 positive because metals are always positive and oxygen’s valency is 2 (negative because non-metal). You criss-cross both you take 2 from oxygen and put it under the iron and then 3 from iron under oxygen.

Valency is the number of electrons needed to be a noble gas. Oxygen has 6 electrons in the outer shell and it needs 2 more to become noble gas. The total number of electrons needed in every shell is 8 so to figure out valency you subtract the number of electrons in the outer shell from 8. Valency also shows how many electrons you need to share for bonding.

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How could you verify that you produced carbon dioxide in your combustion reaction? 2. what indication did you have that nh3 was

DanielleElmas [232]

1) Carbon dioxide is a gas, so when $CO_{2}$ is evolved in the reaction, it appears as bubbles. The gas released extinguishes the fire and it can turn lime water milky.

$Ca(OH)_{2} (aq) + CO_{2}(g) ----> CaCO_{3}(s) +H_{2}O(l)$

2) When $NH_{3}$ is released in a decomposition reaction we can identify by the strong pungent smell of the gas released.

3) Saturated citric acid can cause corrosion of the metal layers present in the pipes. So, before draining out any acid it is neutralized so that the pipes and other plumbing works do not get damaged leading to leaks in the drainage system.

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3 years ago

The compound adrenaline contains 56.7 % c, 6.56 % h, 28.37% o and 8.28 % n by mass. what is the empirical formula for adrenaline

-Dominant- [34]

Answer:- An empirical formula of adrenaline is $C_8H_1_1O_3N$ .

Solution:- Convert given percentages to moles and then calculate the mol ratio to get the simplest whole number ratio of moles of atoms which is the empirical formula of the compound.

$C=\frac{56.7}{12}$ = 4.725 mol

$H=\frac{6.56}{1}$ = 6.56 mol

$O=\frac{28.37}{16}$ = 1.773 mol

$N=\frac{8.28}{14}$ = 0.591 mol

let's calculate the mol ratio now. To calculate the mole ratio, we divide the moles of each by moleso f N as it's the least one:

$C=\frac{4.725}{0.591}$ = 8

$H=\frac{6.56}{0.591}$ = 11

$O=\frac{1.773}{0.591}$ = 3

$N=\frac{0.591}{0.591}$ = 1

So, an empirical formula of adrenaline is $C_8H_1_1O_3N$ .

3 0

3 years ago

Please help! Chemistry thermodynamics! 18 pts!

PSYCHO15rus [73]

200 kJ.

For questions like these, it's generally the same number. See <span>First Law of Thermodynamics. </span>

3 0

3 years ago

Read 2 more answers

A chemist isolates a substance, made of two nonmetals, that is a gas at room temperature. the substance most likely is _____. a

serg [7]

The substance is most likely a molecular compound

5 0

3 years ago

What is the first step in balancing a redox reaction by the half-reaction method?

Oksi-84 [34.3K]

First step is to balance the amount of atoms on each side

So for example if my equation that I have to balance is : Br2 -> Br-

First thing I would have to do would be :
Br2 -> 2Br-

Then I would have to balance the charges on both sides. So because there is a -2 charge on the right side I will have to add a -2 charge onto the right side as well. I would do this by :
Br2 + 2e- -> 2Br-

And now you can see the amount of atoms and the charges are balanced... So your overall reaction is now balanced too.

7 0

3 years ago