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3 years ago

Given the chemical equation: Fe2O3 + 3CO --> 2Fe + 3CO2

Chemistry

1 answer:

iren [92.7K]3 years ago

5 0

Answer:

1 mole

Explanation:

m(Fe) = 112 g

n(Fe₂O₃) = ?

First you must calculate how many moles of Fe is in 112 g of Fe:

n(Fe) = m(Fe) / Ar(Fe) = 112 g / 55,85 g moles⁻¹ = 2 moles

Now, from reaction you compare moles of Fe and Fe₂O₃ :

2 n(Fe₂O₃) = n(Fe)

n(Fe₂O₃) = n(Fe) / 2 = 1 mole

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Suppose you need to prepare 141.9 mL of a 0.223 M aqueous solution of NaCl. What mass of NaCl do you need to use to make the sol

Afina-wow [57]

Answer:

1.811 g

Explanation:

The computation of the mass need to use to make the solution is shown below:

We know that molarity is

$Molarity = \frac{Number\ of\ moles}{Volume\ in\ L}$

So,

$Number\ of\ moles = Molarity\ \times Volume\ in\ L$

$= 0.223\times 0.141$

= 0.031 moles

Now

$Mass = moles \times Molecualr\ weight$

where,

The Molecular weight of NaCl is 58.44 g/mole

And, the moles are 0.031 moles

So, the mass of NaCL is

$= 0.031 \times 58.44$

= 1.811 g

We simply applied the above formulas

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3 years ago

3. If the sun heats my car from a temperature of 20.0 C to a temperature of 55° C, what will the

Katyanochek1 [597]

Answer:

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3 years ago

Transition metals when moving from left to right on the periodic table?

Ierofanga [76]

Answer:

True

Explanation:

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3 years ago

Suppose you carry out a titration involving 2.50 molar NaOH and an unknown concentration of HBr. To bring the reaction to its en

givi [52]

Answer:

Explanation:

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2 years ago

With what compound will NH3 experience only ion-dipole intermolecular forces? a) OCl2 b) NaOH c) SiO2 d) CH3I e) C4H9OH

Norma-Jean [14]

Here we have to choose the molecule which can generate ion-dipole interaction with ammonia.

The NH₃ will have ion dipole interaction only with b) NaOH.

a) The OCl₂ molecule is highly unstable and remains in a linear state as shown in the figure.

b) The NaOH is purely an ionic compound. There is one lone pair of electron on the nitrogen (N) atom of ammonia and also the N-H bond has dipole moment. Now among the given molecules only NaOH is ionic in nature which remains as Na⁺ and OH⁻. Thus we can expect an ion-dipole interaction between these molecules, it is shown in the figure.

c) SiO₂ is purely an covalent compound the structure is shown in the figure.

d) Methyl iodide (CH₃I) is also a covalent compound.

e) The butanol (C₄H₉OH) is a covalent compound.

So we may expect only ion-dipole interaction with b) NaOH.

5 0

4 years ago