All categories

3 years ago

For the reaction 4 Fe + 3 O2 -> Fe2 O3, explain how you would calculate the moles of iron needed to make 10 moles of Fe2O3

Chemistry

1 answer:

Hatshy [7]3 years ago

3 0

Answer:

20 moles

Explanation:

4 Fe + 3O₂ → Fe₂O₃

The chemical equation provided is not yet balanced so let's start by balancing it.

4 Fe + 3O₂ → 2 Fe₂O₃

The equation is now balanced with 4 Fe atoms and 6 O atoms on both sides of the equation. It is important to ensure that the chemical equation is balanced, as only then will it tell you the relationship of the reactants and products in terms of mole.

Looking at the coefficients of Fe and Fe₂O₃, 4 moles of Fe is needed to make 2 moles of Fe₂O₃.

This can be simplified into the mole ratio below.

Fe: Fe₂O₃= 2: 1

This means that for every mole of Fe₂O₃, twice the amount of Fe (in moles) is needed.

Thus for 10 moles of Fe₂O₃,

amount of Fe needed

= 10 ×2

= 20 moles

You might be interested in

How does a phospholipid behave in water?

bonufazy [111]

It is A since the tails are hydrophobic.

5 0

3 years ago

Read 2 more answers

What is the mass of 1.7 × 1023 atoms of zinc (Zn)?

Rudiy27

Number of moles is defined as the ratio of given mass in g to the molar mass.

The mathematical formula is:

Number of moles = $\frac{given mass in g}{molar mass}$ (1)

Number of zinc atoms is equal to $1.7\times10^{23}$ , by Avogadro number, number of moles can be calculated.

As, 1 mol= $6.022\times10^{23}$ atoms, hence,

$1.7\times10^{23}\times\frac{1 mol}{6.022\times10^{23} }$

= 0.2822 mol

Now, from formula (1), calculate mass in g (molar mass of zinc = 65.4 g/mol)

0.2822 mol = $\frac{mass in g}{65.4 g/mol}$

mass in g = ${0.2822 mol \times 65.4 g/mol$

= 18.45588 g

Thus, by rounding off the above number, it will come near about 19 g approximately.

Hence, option (C) is the correct answer.

8 0

4 years ago

How can trace fossils provide info on how the organism lived

iragen [17]

Fossils provide a window in Earth's history by showing us how they existed in the past. They can be dated through several ways and can show us how animals and plants have evolved over millions of years. Also, fossils can help us better understand ancient disasters by the inclusion of elements (such as <span>volcanic ash or dust from major space object impacts) and how they affected the life on earth)</span>

5 0

3 years ago

What is the concentration of each ion in a solution that is prepared by dissolving 5.00 g of ammonium chloride in enough water t

const2013 [10]

Answer:

C = 0.08M

Explanation:

molar mass of AlCl3

Al =27

Cl = 35.5

27+3(35.5) =133.5g/mol

n= mass/Molar mass

n =CV

CV = mass/molar mass

C x 500 x 10^-³ = 5/133.5

C x 500 x 10^-³ = 0.04

C = 0.04/500 x 10^-³

C = 0.08M

4 0

3 years ago

You put scruffy can run up to 2 meters/sec on his fastest days scruffy has a mass of 8 KG what is his maximum kinetic energy on

ale4655 [162]

Answer:

E = 16 J

Explanation:

We have,

You put scruffy can run up to 2 m/s on his fastest days scruffy has a mass of 8 kg

It is required to find the maximum kinetic energy on his fastest days. If v is the velocity, then kinetic energy is given by :

$E=\dfrac{1}{2}mv^2$

Plugging all the values,

$E=\dfrac{1}{2}\times 8\times 2^2 \\\\E=16\ J$

So, the maximum kinetic energy on his fastest day is 16 J.

6 0

4 years ago