Is the chemical equation 4AI + 2O₂ → 2AI2O₃ balanced?

Can someone help me, please?

VikaD [51]

15. D is correct, exothermic reactions release heat

I am not sure about 16

7 0

3 years ago

What is parthenolide

vovangra [49]

Parthenolide is a sesquiterpene lactone which occurs naturally in the plant feverfew--highly concentrated in the flowers and fruit.

7 0

3 years ago

Look at the products of the chemical reaction to determine if the reactant added to water caused an acid reaction, a base reacti

Feliz [49]

1. The reaction is a neutralization reaction

2. The reactant added to the water causes an acid reaction

3. The reactant added to the water causes a base reaction

4. The molarity of the solution is 0.025 M

<h3>What is a neutralization reaction? </h3>

This is a reaction involving an acid and a base which result in the formation of salt and water only

HF + NaOH –> H₂O + NaF

The reaction above indicates neutralization since the reaction produces water (H₂O) and salt (NaF) only

An acid is a substance which dissolves in water to produce hydronium ion H₃O⁺

3HI + 2H₂O —> 2H₃O⁺ + 3I¯ + H⁺

The reaction above is an acid reaction since it produces H₃O⁺

A base is a substance which dissolves in water to produce hydroxide ion OH¯

2CH₃COO¯ + H₂O —> CH₃COO¯ + OH¯ + CH₃COOH

The reaction above is a base reaction since OH¯ is produced.

<h3>How to determine the molarity </h3>

Mole = 0.05 mole
Volume = 2 L

Molarity =?

Molarity = mole / Volume

Molarity = 0.05 / 2

Molarity = 0.025 M

Learn more about molarity:

brainly.com/question/9468209

4 0

2 years ago

The force that opposes drag and is powered by combustion reactions in the<br> engine is

MrMuchimi

Answer:

Thrust.

Explanation:

hope this helps you :)

4 0

3 years ago

Read 2 more answers

Calculate the mass of ammonium sulfide (nh4)2s in 3.00 l of a 0.0200 m solution. g (nh4)2s

mezya [45]

Taking into account the definition of molarity, 4.08 grams of ammonium sulfide are present in 3.00 L of a 0.0200 M solution.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity=\frac{number of moles}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$ .

<h3>Mass of ammonium sulfide</h3>

In this case, you know:

Molarity: 0.0200 M
number of moles: ?
volume: 3 L

Replacing in the definition of molarity:

$0.0200 \frac{moles}{liter}=\frac{number of moles}{3 L}$

Solving:

0.0200 $\frac{moles}{liter}$ × 3 L= number of moles

<u><em>0.06 moles= number of moles</em></u>

On the other side, the molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of ammonium sulfide is 68 g/mole.

Then, the amount of mass contained in 0.06 moles is calculated as:

0.06 moles× $\frac{68 grams}{1 mole}$ = <u><em>4.08 grams</em></u>