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Yanka [14]
4 years ago
12

How many moles of fe3o4 can be produced when 12.00 mol fe react with 6.00 mol o2?

Chemistry
1 answer:
ludmilkaskok [199]4 years ago
5 0

In order to calculate the moles of product we need to write complete balanced chemical reaction. 3Fe(s) + 2O2   --->Fe3O4 Hence one mole of Fe3O4 will be produced from three moles of Fe and 2moles of oxygen molecule. For given 12 moles of Fe 8 moles of O2 will be required. Howwver only six moles of O2 are given so O2 is the limiting reagent. The six mes of O2 will react with 9 molws of Fe to produce three moles of Fe3O4.

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Why do polar molecules have a greater tendency to remain a liquid or a solid at room temperature?
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Polar molecules are molecules wherein the atoms do not share an electron equally in a bond especially a covalent bond. Due to this unequal sharing of the electrons, a dipole would form where a part would have a partial positive charge and the other end would have a partial negative charge. Having both the partial positive and the negative charges, the molecules of the substance would have a tendency to hold each other. As a result, polar molecules would exist at room temperature as liquids or solids rather than existing as gas. Examples are water, sugar, ethanol and hydrochloric acid.
7 0
4 years ago
What causes the different colors of layers in a sedimentary rock? A. the cooling process of the magma B. the weather in the area
OLga [1]

Different colors of sedimentary rock are determined by the environment where they are located. For example, red rocks form where oxygen is present. Darker sediments form when the environment is oxygen poor.

So, basically, the weather and surroundings of the rock, so B.

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3 years ago
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6 0
3 years ago
A = ε l c. (a) Define the terms in the formula: A = ε l c. (Pick your answers using the letter of the correct definition.)
VladimirAG [237]

Explanation:

Using Beer-Lambert's law :

Formula used :

A=\epsilon \times c\times l

where,

A = absorbance of solution

c = concentration of solution

l = length of the cell

\epsilon = molar absorptivity of this solution

According to question:

A = (C) : absorbance measured by the spectrometer

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7 0
3 years ago
A chemistry student needs 15.0 g of methanol for an experiment. She has available 320. g of 44.4% w/w solution of methanol in wa
Makovka662 [10]

Answer:

33.8 g Solution

Explanation:

A chemistry student needs 15.0 g of methanol for an experiment. The concentration of ethanol in the solution is 44.4% w/w, that is, there are 44.4 g of methanol every 100 g of solution. The mass of solution that would contain 15.0 g of methanol is:

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Since 33.8 g are required and 320. g are available, there is enough solution for the requirements.

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