2FeCl3 + MgO -> Fe2O3 + 3MgCl2
Convert 3.00 moles of MgO to moles of Fe2O3

Answers

Answer 1

Answer:

71.8 g of iron (III) oxide (Fe₂O₃) were produced from 3 moles of magnesium oxide (MgO).

Explanation:

We have the following chemical reaction:

2 FeCl₃ + 3 MgO → Fe₂O₃ + 3 MgCl₂

We see from the chemical reaction that 3 moles of magnesium oxide (MgO) will produce 1 mole of iron (III) oxide (Fe₂O₃).

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe₂O₃ = 1 × 71.8 = 71.8 g

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number of moles

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What is the difference between conduction and convection?

Answers

These are both ways heat travel. Conduction is when something is touching something i.e. When you touch a hot pan. Convection is heat rising, then cooling so it sinks and heats back up and rises again repetitively i.e. A convection oven (think circulation of heat)

CONVECTION is the transfer of heat from high temperature to low temperature with movement of mass or medium due to temperature difference in the region. Although, convection is a bit similar to conduction, but convection involves movement of substances. Such as wind system in our planet. Air moves due to temperature difference in every part of our planet. Then, CONDUCTION is the transfer of heat, of course from high temperature to low temperature when two objects (such as metals) are in direct contact (without the movement of metals).

4. The average kinetic energy of water molecules is greatest inO liquid water at 273 K
O ice at 0°C
O liquid water at 90°C
O steam at 100°C

Answers

The average kinetic energy of water molecules is greatest in steam at 100°C.

Kinetic energy of water

Water is a polar solvent that has potential energy on its own which can be converted to kinetic energy once the water is in motion.

The kinetic energy is that energy that a moving body possesses.The faster a molecule moves, the more kinetic energy it has, and the higher the measured temperature.

That being said, when the temperature of water is increased, there would be increased molecular motion leading to a higher kinetic energy.

Therefore, the average kinetic energy of water molecules is greatest in steam at 100°C.

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Answer:

steam at 100°C

Explanation:

Grandpoint approved

Which volume of 0.10 M NaOH(aq) exactly neutralizes 1.50 milliliters of 0.20 M HBO3(aq)?

Answers

From the information given above, NAOH is a base and HNO3 is an acid.
The chemical equation for the reaction is as follows"
NAOH + HNO3 = NANO3 + H2O
From these equation, we can see that the mole ratio of acid to base is 1:1.
In the question, we are given the following information:
Concentration of the acid, CA = 0.20 M
Volume of the acid, VA = 15 ML
Concentration of the base, CB = 0.10 M
We are to calculate the volume of the base, VB = ?
The formula for calculating volume and concentration for acid and base is as follows:
CA * VA = CB * VB
VB = CA * VA / CB = 0.20 * 15 / 0.1 = 3.0 / 0.1 = 30
VB = 30 ML.
Therefore, the volume of base required to neutralize the acid is 30 ml.

What does the group number of A elements in the A/B numbering system)tell about valence electrons?

A. The A group number tells which period the valence electrons are
in
B. The A group number tells how much mass the elements have.
C. All elements in the same A group will have the same number of
valence electrons.
D. All elements in the A group will have the same valence electrons
as the B group.

Answers

Answer:

All elements in the same A group will have the same number of

valence electrons.

Explanation:

Group A has 1 valence electrons.

According to the graph, what is the name for the change in water temperature that occurs at approximately 1300 m? A. halocline B. thermocline C. isocline D. baryocline

Answers

the answer is b thermocline

Given the balanced equation representing a reaction:H2O + HCl ==> H3O+ + Cl-
According to one acid-base theory, the H2O molecule
(1) accepts H+ ions (3) donate H+ ions
(2) accepts OH- ions (4) donates OH- ions

Answers

The statement, that describes acid-base theory in which the H2O molecule is "accepts $H^(+)$ ions."

What is an acid-base theory?

An acid is a compound that accepts a pair of electrons. A base is a generator of electron pairs. This is the broadest theory of acids and bases. Water can serve as both an acid and a base in solution, and it can also be both an acid and a base to itself. Water takes hydrogen ions and behaves as a base when coupled with an acid. When water is combined with a base, it gives hydrogen ions and so behaves as an acid. Using the balanced equation, the water molecule acts a acid which accepts the hydrogen ion. to form hydronium ion.