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vichka [17]
3 years ago
15

A sample of iron metal is placed in a graduated cylinder. it is noted that 10.4 ml of water is displaced by the iron. the iron i

s then reacted with excess hydrochloric acid to produce iron (ii) chloride and hydrogen gas. given the density for iron is 7.86 g/ml, how many grams of iron (ii) chloride are produced in the reaction?
Chemistry
1 answer:
Pavel [41]3 years ago
7 0
<h3>Answer:</h3>

                 162.43 g of FeCl₂

<h3>Explanation:</h3>

Step 1: Calculate mass of Fe;

As,

                                   Density  =  Mass ÷ Volume

Or,

                                   Mass  =  Density × Volume

Where Volume is the volume of water displaced  =  10.4 mL

Putting values,

                                   Mass  =  7.86 g.mL⁻¹ × 10.4 mL

                                   Mass  =  81.744 g of Fe

Step 2: Calculate amount of FeCl₂;

The balance chemical equation is as follow,

                                Fe  +  2 HCl   →    FeCl₂  +  H₂ ↑

According to this equation,

       55.85 g (1 mol) Fe produced  =  110.98 g (1 mol) of FeCl₂

So,

               81.744 g Fe will produce  =  X g of FeCl₂

Solving for X,

                    X  =  (81.744 g × 110.98 g) ÷ 55.85 g

                     X =  162.43 g of FeCl₂

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The statement “Only the “Conclusion” section discusses whether the original hypothesis was supported, and both sections suggest further  research”, best describes the difference between analysis and conclusion.

Answer: Option 4

<u>Explanation: </u>

In research, we do experiments and derive the results. Then, those results were analyzed by us. In this analysis part, we compare our results with the related results published elsewhere. Also, we correlate the similarities and point out the differences between our analysis and other reported results.

In conclusion part, we have to check hypothesis or it supported. And, we summarise our analysis and figure out the further research need to be done on that to improvise our research. So, the final statement is the correct option which best describes the difference between analysis and conclusion.

3 0
3 years ago
A___________ consists of a mixture of graphite powder (a form of carbon) and clay that is baked and hardened and encased in wood
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A pencil is a writing material, where the graphite is what gives the black color to the writing stroke.

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2 years ago
Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 5
Stolb23 [73]

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The pressure of O₂ is 0.8 atm.

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This relationship is due to the assumption that there are no attractive forces between the gases.

In this case:

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6 0
3 years ago
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The law of conservation has been stated that the mass and energy has neither be created nor destroyed in a chemical reaction.

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<h3>Conservation law</h3><h3 />

The given equation has been assessed as follows:

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Learn more about conservation law, here:

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4 0
2 years ago
Can someone please explain this i will give brainliest
IrinaVladis [17]
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It is:
2 H2 + O2 -> 2 H2O
4 0
2 years ago
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