How many grams of magnesium oxide can be produced when 97.2 g Mg react with 88.5 g O2?

Answers

Answer 1

Answer: First we establish the chemical reaction equation.
2Mg + O2 = 2MgO.
Then we need to know which of the reactant is limiting. We do that by multiplying the number of moles of reactant to the stoichiomeric coefficient. For Magnesium: 97.2 g $* (mol)/(24g) *2 = 8$
For O2: 88.5g* $(mol)/(32g) *1 = 2.7$
Since O2 has the smaller moles, this is the Limiting reactant. Then we solve basing on the number of O2 used.

88.5g $* (mol)/(32g) * (2)/(1) * (56g)/(mol) = 309.75 g$

Answer 2

Answer:

Answer : The mass of magnesium oxide produced will be, 161.2 g

Solution : Given,

Mass of Mg = 97.2 g

Mass of $O_2$ = 88.5 g

Molar mass of Mg = 24.3 g/mole

Molar mass of $O_2$ = 32 g/mole

Molar mass of MgO = 40.3 g/mole

First we have to calculate the moles of Mg and $O_2$ .

$\text{Moles of Mg}=\frac{\text{Mass of Mg}}{\text{Molar mass of Mg}}=(97.2g)/(24.3g/mole)=4\text{ moles}$

$\text{Moles of }O_2=\frac{\text{Mass of }O_2}{\text{Molar mass of }O_2}=(88.5g)/(32g/mole)=2.7\text{ moles}$

The balanced reaction is,

$2Mg+O_2\rightarrow 2MgO$

As, 2 moles of Mg react with 1 moles of $O_2$

So, 4 moles of Mg react with $(4)/(2)=2$ moles of $O_2$

From this we conclude that the $O_2$ is in excess amount and Mg is in limited amount.

Now from the reaction we conclude that

As, 2 moles of Mg react to give 2 moles of MgO

So, 4 moles of Mg react to give 4 moles of MgO

Now we have to calculate the mass of MgO.

$\text{Mass of MgO}=\text{Moles of MgO}* \text{Molar mass of MgO}$

$\text{Mass of MgO}=(4moles)* (40.3g/mole)=161.2g$

Therefore, the mass of magnesium oxide produced will be, 161.2 g

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What is the atomic number, icon, mass of potassium?

This should be EASY!

Answers

Answer:

19, K, 39.098

Explanation:

Potassium is a chemical element with symbol K and atomic number 19.

Atomic Mass: 39.098u

The density of an elemental gas is 1.7824 g/l at stp. what is the molar mass of the element. what is the element?

Answers

Answer: The molar mass of the element is 40 g/mol and element is Calcium.

Explanation:

At STP:

1 mole of a gas contains 22.4 L of volume

Molar mass is defined as the mass of 1 mole of a substance.

To calculate mass of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Volume of gas = 22.4 L

Density of gas = 1.7824 g/L

Putting values in above equation, we get:

$1.7824g/L=\frac{\text{Mass of gas}}{22.4L}\n\n\text{Mass of gas}=(1.7824g/L* 22.4L)=39.9g\approx 40g$

The element having molar mass 40 g is Calcium.

Hence, the molar mass of the element is 40 g/mol and element is Calcium.

At STP 1 mole of gas occupies 22.4L. So you just multiply 1.7824g/L by 22.4L and the Liters cancel out. So the final answer is 39.92 and element Argon is closest to this mass so Argon is the element.

The following balanced equation shows the formation of sulfur dioxide. S + O2 mc023-1.jpg SO2 How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

Answers

For the given chemical reaction, 15 moles of sulfur are required to produce 15 moles of sulfur dioxide.

What is the balanced chemical equation?

A chemical equation can be defined as a representation of a chemical reaction in the form of symbols of the substances. A chemical equation consists of contributing reactants in the reaction, formed products, and their physical states.

The chemical equation in which the number of atoms of each element is equal on both sides of the equation is called a balanced chemical equation.

The law of conservation of mass follows by a balancing of a chemical equation therefore, the total mass of the elements on the reactant side must be equal to the total mass of elements on the product side.

Given, the chemical equation is: S + O₂ → SO₂

From the above equation, we can say that one mole of sulfur produces one mole of sulfur dioxide.

Given the moles of the sulfur dioxide = 15 moles

The moles of sulfur required to make 15 moles of sulfur = 15 moles

Therefore, 15 moles of sulfur are required for the given conditions.

Learn more about the balanced chemical equation, here:

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S + O₂ = SO₂

1 mole S ------------ 1 mole SO₂
? mole S ----------- 15.0 mole SO₂

S = 15.0 * 1 / 1

= 15 moles of S

hope this helps!

In which substance do the molecules have the strongest attractions to one another?a. sugar, a solid
c. sulfuric acid, a liquid
b. hydrogen, a gas
d. water, a liquid

Answers

The substance that the molecules have the strongest attractions to one another is the sugar, a solid. The answer is letter A. The solid has a more definite shape and volume. The particles are locked into place. It cannot be further compressed due to the bond that exists between the molecules. The kinetic energy of the molecules is close to none because the molecules are so close and so compact with each other.

Answer:

Explanation:

Which of the following is malleable?
A. glass
B. pottery
C. ice
D. gold

Answers

The answer is D. Gold. Malleability, the ability for a material to be hammered or shaped into thin sheets, is a common property of metals. Among the choices, gold is the only metal. Also, gold is considered to be the most malleable metal.

Final answer:

Gold is malleable while glass, pottery, and ice are not.

Explanation:

Malleability is the ability of a material to be hammered or rolled into thin sheets without breaking. Gold is highly malleable and can be shaped into various forms, such as jewelry and gold leaf. Glass, pottery, and ice, on the other hand, are not malleable because they will break or shatter when hammered or rolled into thin sheets.

Gold is malleable because its metallic bonds allow its atoms to slide past one another without breaking. Glass, pottery, and ice lack these bonds and have a more rigid structure, making them non-malleable. Instead, glass and pottery are brittle, while ice can fracture under stress due to its molecular structure.

Learn more about Malleability of Materials here:

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SI units are useful because they are all related by multiples of ____.

Answers

Answer:

SI units are useful because they are all related by multiples of 10.

Explanation:

International System of Units (abbreviated SI) is a system of measurement units, which is used almost everywhere in the world.

A unit system is a set of units of consistent, standard and uniform measurement. In other words, a unit system is a set of units (grouped and formally defined) that is used as a standard. Normally, in a system of units, few basic units are defined and from these several derived units are defined.

The International System of Units defines seven basic units, also called fundamental units, which define the corresponding fundamental physical quantities, chosen by convention, and which allow to express any physical quantity in terms or as a combination of them. The other units are obtained by combining the basic units.

The basic units of this system are:

Length-meter (m)
Mass-kilogram (kg)
Time- second (s)
Electric current intensity - ampere (A)
Temperature - Kelvin (K)
Amount of substance - mol (mol)
Light intensity - candela (cd)

The SI is based on the metric system, which is a system of units that are related to each other by multiples or submultiples of 10.

Then, SI units are useful because they are all related by multiples of 10.

SI units are useful as they are all related by multiples of 10.

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