How many molecules are there in 79g of Fe2O3? how many atoms is thi

Answers

Answer 1

Answer: Molar masses:
$m_(Fe) = 56g/mol\nm_(O) = 16g/mol\n\n\therefore m_{Fe_(2)O_(3)} = 2 \cdot (56)+3 \cdot (16) = 112+48 = 160g/mol$

So:

$1mol \ Fe_(2)O_(3) = 160g = 6 \cdot 10^(23)molecules$

160g ---------- 6·10²³molecules
79g ---------- x

x = 2.9625·10²³ molecules

1molecule = 5 atoms
2.9625·10²³ molecules = 2.9625·10²³·5 = 14.8125·10²³ atoms

Related Questions

If a reaction system has come to equilibrium, the concentration of products can be increaseda. only if it is not reversible. c. by applying Le Châtelier’s principle. b. only if the temperature is low enough. d. under no circumstances.
What is the charge on an electron?
All parts of the rock cycle are connected, whether directly or indirectly. Which statementbest shows how sedimentary rocks are related to igneous rocks? 1.Under pressure, sedimentary rocks form from igneous rock. 2.Igneous rocks can weather, creating sediments that form sedimentary rocks. 3. During weathering, sedimentary rocks melt and form igneous rock. 4.Under pressure, igneous rock undergoes changes that form sedimentary rock.
Choose all the answers that apply. Science _____. is subjective must be ethical is based on fact is objective is based on bias
At any given location, the physical properties of a substance do not change. a. True b. False

Which aqueous solution will cause the bulb to light?

Answers

LiOH(aq)

Hope this helps :)

What element has 81 protons in the nuclei of its atoms? A. Platinum
B. Uranium
C. Lead
D. Thallium

Answers

Thallium has got 81 protons

Have a nice days.......

Thallium has 81 protons in the nuclei of its atoms.

What is a common ancestor?

Answers

In evolutionary biology, a common ancestor is allegedly a link between two varying branches or types of creatures. (Another word for these is 'missing links', since up to this point, not a single one of these common ancestors has been found in the fossil record)
Hope that helped =)

A Common ancestor is a organism that has shared predecessor of more then one different scion of a group of organisms.

What needs to happen for a solute to dissolve in a particular solvent?

Answers

Answer: In order to a solute to dissolve in a solvent, both the attraction forces that bind the units of solute together and the intermolecular forces that bind the molecules of solvent together must be weaker than the attraction forces between the particles of solute and the molecules of solvent.

Explanation:

The solute particles in are binded together in virtue of attractive forces (the nature and strength of these forces depends on the particular solute).

The same happens with the solvent molecules: they are binded by attractive forces (similarly, the nature and strength of these forces depend on the particular solvent).

To get dissolved (form solution) the particles of solute must be separated and mixed with the solvent particles in a process called solvatation.

The solute particles must surrounded by the solvent particles.

When the forces of attraction between the solute particles and the solvent are stronger than the forces of attraction that bind the solute particles, the solute particles move away from the solid solute and are integrated into the solution.

the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Is melting ice an endothermic or exothermic? its a big class discussion in chemistry and the teacher won't tell us until the whole class agrees

Answers

It is an Endothermic because the ice cube is absorbing the heat making the ice cube melt. It can not be Endothermic because it is not releasing any heat it is melting.

What type of reaction is
CH 4 (g)+2O 2 (g) CO 2 (g)+2H 2 O(g)

Answers

Answer: combustion

Explanation:

Combustion reactions can be identified by looking at the reactants and the products.

Usually, the reactants will be a hydrocarbon and oxygen. And the products will be CO2 and H2O

Other Questions

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 525 mL of insulin at a concentration of 50.0 mg/mL . What is the total mass of insulin in the bottle?

What is the total number of protons contained in the nucleus of a carbon 14 atom

How many molecules are in 69 grams of Na?

Potassium hydroxide is classified as an Arrhenius base because KOH contains(1) OH- ions (2) O2- ions (3) K+ ions (4) H+ ions