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2 years ago

How many moles of FeS2 are required to produce 32g of SO2?

Chemistry

1 answer:

nirvana33 [79]2 years ago

7 0

Answer:

So, the right answer is

No. of moles of FeS₂ = 0.25 mole

Explanation:

From the balanced

4 FeS2 + 11 O2 → 2 Fe2O3 + 8 SO2

it is clear that 4 mol FeS₂ react with O₂ to give Fe₂O₃ and 8 mol of SO₂

First, we have to convert mass of SO₂ into No. of moles as following:

SO₂ has molar mass = 64 g/mol

No. of moles of SO₂ = (mass / molar mass) = (32 g / 64 g/mol) = 0.5 mol

we know that

4 mol FeS₂ gives→ 8 mol of SO₂

1 mol FeS₂ gives→ 2 mol of SO₂

??? mol FeS₂ gives→ 0.5 mol of SO₂

No. of moles of FeS₂ = (0.5 mol * 1 mol ) / 2 mol = 0.25 mol

So, the right answer is

No. of moles of FeS₂ = 0.25 mol

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Which undefined geometric term is described as a two-dimensional set of points that has no beginning or end?

adell [148]

Answer:

The two-dimensional set of points that has no beginning or end is described by the undefined geometric term plane.

Explanation:

There are three undefined terms in geometry:

point,
line, and
plane

They are referred as undefined terms because they are not defined in a formal way, i.e. using mathematically defined words. At the end these terms are abstractions (ideas).

The point has no dimensions, it can be represented by the tip of a sharp pencil.

The line is referred as an infinite set of joined points that extend indefinitely in one direction (from right to left, from north to south), so it has one dimension. The intersection of of two perpendicular walls is an example of what a line is.

Finally, the term to which the question is referred is the plane: an infinite set of joined points that extends in two dimensions. An example of plane is the surface of quite water. The plane does not have depth, only extension; that is why it has only two dimensions.

So, you should remember: points do not have dimensions, lines have one dimension, and planes have two dimensions.

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2 years ago

Acetic acid, ch3cooh, is a weak organic acid, pka 4.47. determine the position of the equilibrium for the reaction of acetic aci

Alexeev081 [22]

Acetic acid (CH3COOH) is a weak acid while methylamine (CH3NH2) is a weak base. During an acid base reaction, an acid tends to lose a proton while a base tends to accept a proton. The reaction at equilibrium is as follows:

$CH3COOH +CH3NH2$ ↔ $CH3COO^{-} +CH3NH3^{+}$

Hence the species in equilibrium are:

Acetate anion: CH3COO-

Methyl ammonium cation: CH3NH3+

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2 years ago

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A researcher claims that an ancient scroll originated from greek scholars in about 500 bce. a measure of its carbon-14 decay rat

Naddik [55]

The amount of substance present in a certain object with a given half-life in terms of h can be expressed through the equation,

A(t) = (A(o))(0.5)^(t/h)

where A(t) is the amount of substance after t years and A(o) is the original amount. In this item we are given that A(t)/A(o) is equal to 0.89. Substituting the known values,

0.89 = (0.5)(t / 5730 years)

The value of t from the equation is 963.34 years.

Answer: 963 years

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2 years ago

What is the net ionic equation for 2Sb(OH)3 (s) + 3Na2S (aq) = Sb2S3 + 6NaOH

tatuchka [14]

Answer:

2Sb^(+3) (aq) + 3S^(-2) (aq) = Sb_2•S_3

Explanation:

First of all, let us balance the equation to give;

2Sb(OH)3 (s) + 3Na2S (aq) = Sb2S3 + 3NaOH

Now, we can observe the presence of positive Sodium ions (Na+) and negative hydroxyl ions (OH-) on both left and right sides of the equation.

Now, the two ions will cancel out. These ions are not really involved in the overall reaction and thus do not require being written in the overall equation. Hence, the overall net ionic reaction can now be written as:

2Sb^(+3) (aq) + 3S^(-2) (aq) = Sb_2•S_3

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2 years ago

(9). A machine has a mechanical advantage of 0.6. What force should be applied to the machine to make it apply 600 N to an objec

Bogdan [553]

(9) Mechanical advantage = force by machine / force applied to machine
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Efficiency = (500 / 2000) x 100
Efficiency = 25%

(4) The overall energy conversion in power plants is chemical to electrical while in dams it is potential to electrical.

(5) Using the formula:
1568 = 40 x 9.81 x h
h = 4.0 m

(6) Potential to electrical

(10) An object raised and held stationary above the ground.

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2 years ago

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