#11.) When iron rusts in air, iron(III) oxide is produced. How many moles of oxygen react with 77.4 mol of iron in the rusting reaction?4Fe(s) + 3O2(g) → 2Fe2O3(s)
Select one:
a. 58
b. 100
c. 77
d. 120
#13.) For the reaction CH4 + 2O2 → CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 161.0 g of methane?
Select one:
a. 10.03
b. 20.06
c. 2584
d. 3.351
Answers
Answer 1)Option A) 58.05
In the given reaction of iron forming rust when reacts with the oxygen.
We can clearly see that, 4 moles of iron reacts with 3 moles of oxygen to give 2 moles of iron oxide.
So 4 Fe : 3 O and 77.4 moles of Fe : x moles of O
(3 X 77.4) / 4 = 58.05
So when we solve we get x as 58.05.
Hence the no. of moles of oxygen will be 58.
Answer 2) Option A) 10.03
The number of moles of carbon dioxide produced when 161.0 g of methane undergoes combustion will be 10.03
as we know the molar mass of methane is 16.043g
As we can see in the reaction the mole ratio is 1:1;
1 mole of methane produces 1 mole of carbondioxide.
So, 161 g / 16.043 g = 10.03 moles of Carbon dioxide.
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four moles of C over three moles of F e
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Answers
Answer:
2 moles ofFerric Oxide () over 4 moles of Fe
Explanation:
Firts of all I want to explain the nomenclature that is involve in the equation:
Ferric Oxide
Carbon
Iron
Carbon Dioxide
Now, to understand the ratio from the balanced equation its necessary read the equation with the respective coefficients, for example:
- 2 moles of Ferric Oxide (
) reacts to produce 4 moles of Iron (
)
- 3 moles of Carbon (
) reacts to produce 4 moles of Iron (
- 2 moles of Ferric Oxide (
) reacts to produce 3 moles of Carbon Dioxide (
)
Each of the above could be represent as a ratio, but is always necessary keep the respective coefficient, then if you read each option only the first has the respective coefficient, it means:
2 moles of Ferric Oxide () reacts to produce 4 moles of Iron (
) or, in other words, 2 moles ofFerric Oxide (
) over 4 moles of Iron 4 (
)
Regards!
Answers
It's called an heterogeneous mixture :)
Answers
Light shining through the less dense material.
Answers
Answer: The correct answer for the blank is-
B) cytoplasm.
Cytoplasm is the fluid filled compartment ( a thick, gel like substance) within the cell of a living organism that is mainly composed of water, salts, and proteins. It is surrounded by the cell membrane ( plasma membrane) and contains all the parts of cell ( such as in eukaryotic cell, it contains all the cell organelles except nucleus). It is the site for all the essential cellular processes.
Thus, option B) is the right answer.
Answer: Option (B) is the correct answer.
Explanation:
- In a living organism, the cell which is mostly composed of water, salts and proteins is known as cytoplasm.
It is thick and gel like in nature which has fluid filled compartment.
- A chloroplast is an organelle found in the cells of plants and eukaryotic algae which are responsible for the conduction of photosynthesis.
- Nucleus is an organelle present in eukaryotic cells. It contains hereditary information of a cell and helps in controlling the growth and reproduction of cells.
- Polymers of amino acids are known as proteins. Each protein has some specific functions.
Thus, we can conclude that out of the given options cytoplasm is a gel-like substance enclosed by the cell membrane that contains the cell's organelles.
Answers
Answer:
-12
Explanation:
11 degrees fahrenheit = -11.6667
Rounded it the nearest thenth is -12
Answers
Answer:
Is the type of radiation with a higher frequency and energy.
Explanation:
Into the electromagnetic spectrum, there are several kind of radiation, the gamma one has the highest energy and frequency, because both characteristics are connected in a direct form.
Gamma radiation has higher energy and higher frequency among the different types of electromagnetic radiations.
Explanation:
The quantity of energy present in the photons determines the electromagnetic radiation type. Radio waves have low energy photons, while microwave photons have a bit more energy than the radio waves, infrared rays have more photons than the micro and radio waves, then followed by visible, ultraviolet, X-rays, and, the gamma-rays which is highly energetic among all.
A short wavelength means a high frequency, whereas, a long wavelength means a low frequency. In electromagnetic spectrum, the wavelength of gamma rays is shorter than all other electromagnetic rays. Hence, it has the high frequency.