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Stella [2.4K]
3 years ago
5

Explain why iron sulfide has different properties from a physical mixture of the elements iron and sulfur?

Chemistry
2 answers:
soldi70 [24.7K]3 years ago
8 0
<span>Iron is a metal, while sulfur is a nonmetal. when these two are heated together, the iron atoms combine with the sulfur atoms to make a compound known as iron sulphide. ( iron sulphide is not iron or sulfur; it is a pure substance with its own sets of distinguishing physical and chemical characteristics </span>
Ulleksa [173]3 years ago
3 0
"Iron and sulfur are both elements from the periodic table of elements.  As such, each one has its own unique set of physical and chemical properties.  Iron is a metal, while sulfur is a nonmetal.  When these two are heated together, the iron atoms combine with the sulfur atoms to make a compound known as iron sulphide.  A compound is different from elements in that it is made from the chemical union of two or more elements.  Iron sulphide is not iron or sulfur; it is a pure substance with its own set of distinguishing physical and chemical characteristics.  A mixture, on the other hand, is what you get by combining two or more elements, but not chemically combining them.  In the case of the iron and the sulfur, if you mix them and provide no heat, you simply have a mixture of iron and sulfur.  Mixtures are different from compounds in that they are easily separated.  A magnet could be used to separate the iron from the sulfur, because iron is attracted to magnets, while sulfur is not." https://www.enotes.com/homework-help/explain-why-iron-sulphide-compound-not-just-336735 - I hope this helps! :)
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The breaking down and changing of rocks at or near Earth's surface is called _____.
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The answer is weathering
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3 years ago
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What is the empirical formula for a compound that is 82.2% nitrogen and 17.8% hydrogen?
Stolb23 [73]
Empirical formula=CH3
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3 years ago
닭이 먼저냐 달걀이 먼저냐. 설명.​
k0ka [10]

Answer:

계란은 확실히 닭보다 먼저 나왔지만 닭 계란은 그렇지 않았습니다. 그러나 진화론적 증거에 따라 절대적으로 한 편을 선택해야 한다면 우리는 팀 에그에 있습니다..

Explanation:

도움이 되었기를 바랍니다..

미리 환영합니다!!

(;ŏ﹏ŏ)(ㆁωㆁ)

6 0
2 years ago
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How much CuSO4*5H2O and Na2CO3 is needed to obtain 5g of CuCO3?
Svetllana [295]
I think the reaction that is occurring is CuSO₄(aq)+Na₂CO₃(aq)⇒CuCO₃(s)+Na₂SO₄(aq).  Water in the hydrate will just become part of water in solution so it does not really matter for this question.  
SInce we now know the balanced chemical equation, you can use stoichiometry to find the amount of reactants needed to produce 5g CuCO₃.  
The first step to any stoichiometry question is to convert the mass given into moles.  To do this you have to divide the mass by the molar mass of the compound the mass is referring to.  The molar mass of CuCO₃ is 123.5g/mol so you have to divide 5g by 123.5g/mol to get 0.04047 moles of CuCO₃.
The next step in this qustoin is to find the number of moles of each reactant using the moles of product we found in the first step.  To do this, we need go back and look at the equation to find the molar ratios which is shown through the coefficients.  Since all of the coeficients in the chemical equation is 1, we know the molar ratios are all `1 to 1 and therefore the number of moels of each reactant is equal to the number of moles of the product found in step one.  This means that you started off with 0.04047 moles of both CuSO₄ and Na₂CO₃.
The final step is to multiply the number moles of each reactant by its molar mass.  the molar mass of CuSO₄ is 159.6g/mol and the molar mass of Na₂CO₃ is 106g/mol.  When you multiply 0.04047mol by 159.6g/mol you get 6.4g and when you multiply 0.04047mol by 106g/mol you get 4.29g.
Therefore you started with 6.4g of CuSO₄ and 4.29g of Na₂CO₃.
I hope this helps.
5 0
3 years ago
CaCO3(s)⇄CaO(s)+CO2(g) When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxid
rusak2 [61]

Answer:

1.04 mol

Explanation:

CO₂ is produced in a closed 100 L vessel according to the following equation.

CaCO₃(s) ⇄ CaO(s) + CO₂(g)

At equilibrium, the pressure of carbon dioxide remains constant at 1.00 atm.

First, we need to conver the temperature to the absolute scale (Kelvin scale) using the following expression.

K = °C + 273.15

K = 898°C + 273.15

K = 1171 K

Now, we can find the moles of carbon dioxide using the ideal gas equation.

P \times V = n \times R \times T\\n = \frac{P \times V}{R \times T} = \frac{1.00atm \times 100L}{\frac{0.0821atm.L}{mol.K}  \times 1171K} = 1.04 mol

7 0
3 years ago
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