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3 years ago

How many grams of water are needed to form 21.8 grams of oxygen gas?

Chemistry

1 answer:

GaryK [48]3 years ago

5 0

Answer:

24.5g

Explanation:

Given parameters:

Mass of oxygen gas = 21.8g

Unknown:

Mass of water = ?

Solution:

This problem deals with the decomposition of water;

Reaction equation;

2H₂O → 2H₂ + O₂

2 mole of water will produce 1 mole of oxygen gas

First find the number of mole of the oxygen gas given;

Number of moles = $\frac{mass}{molar mass}$

molar mass of O₂ = 2(16) = 32g/mol

Number of moles of O₂ = $\frac{21.8}{32}$ = 0.68moles

1 mole of oxygen gas will be produced from 2 mole of water

0.68moles of oxygen gas will be produce from 0.68 x 2 moles of water; = 1.36moles of water

Mass of water = number of moles x molar mass

Molar mass of water = 2(1) + 16 = 18g/mol

Mass of water = 1.36 x 18 = 24.5g

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How many grams of ammonia (NH3) can be produced by the synthesis of excess hydrogen gas (H2) and 253.8 grams of nitrogen gas (N2

kogti [31]

Answer:

308.2 g of NH₃.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3H₂ + N₂ —> 2NH₃

Next, we shall determine the mass of N₂ that reacted and the mass of NH₃ produced from the balanced equation. This can be obtained as follow:

Molar mass of N₂ = 2 × 14 = 28 g/mol

Mass of N₂ from the balanced equation = 1 × 28 = 28 g

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3 = 17 g/mol

Mass of NH₃ from the balanced equation = 2 × 17 = 34 g

Summary:

From the balanced equation above,

28 g of N₂ reacted to produce 34 g of NH₃.

Finally, we shall determine the mass of NH₃ produced by the reaction of 253.8 g of N₂. This can be obtained as illustrated below:

From the balanced equation above,

28 g of N₂ reacted to produce 34 g of NH₃.

Therefore, 253.8 g of N₂ will react to produce = (253.8 × 34)/28 = 308.2 g of NH₃.

Thus, 308.2 g of NH₃ were obtained from the reaction.

8 0

3 years ago

9. According to an "alternative theory", H2O is

Jlenok [28]

Answer:(4) ----accepts a proton

Explanation:

H2O water can produce both hydrogen and hydroxide ions

H2O --> H+ + OH-

According to the Bronsted-Lowry theory, it can be a proton donor and a proton acceptor.this means that It can donate a hydrogen ion to become its conjugate base, or can accept a hydrogen ion to form its conjugate acid,

When , a water molecule, H2O accepts a proton it will act as a Brønsted-Lowry base especially when dissolved in a strong acidic medium. for eg

HCl + H2O(l) → H3O+(aq) + Cl−(aq)

Here, Hydrochloric acid is a strong acid and ionizes completely in water, since it is more acidic than water, the water will act as a base.

6 0

3 years ago

Where does the 'Equiv' come from?

slega [8]

Explanation:

Equiv means equivalent ...

5 0

2 years ago

What do Arrhenius acids have in common? What do Arrhenius bases have in common? Explain neutralization in terms of the Arrhenius

OLEGan [10]

Besides producing hydrogen ions in water, all Arrhenius acids have a few things in common. They have pH values anywhere from 0 up to 7, they taste and smell sour and they will turn pH paper pink, red, or orange.

<h3>What Arrhenius acids?</h3>

A substance that raises the concentration of H+ ions in an aqueous solution is known as an Arrhenius acid. Traditional Arrhenius acids are highly polarized covalent substances that dissociate in water to form an anion (A-) and the cation H+.

Aqueous Arrhenius acids have distinguishing characteristics that serve as a useful definition of an acid. Acids can turn blue litmus red, produce aqueous solutions with a sour taste, and react with bases and some metals (like calcium) to generate salts. The Latin word acidus/acre, which means "sour," is where the word acid originates.

Although the precise definition solely refers to the solute, the term "acid" is sometimes used to refer to an aqueous solution of an acid that has a pH lower than 8.

To learn more about Arrhenius acids from the given link:

brainly.com/question/22095536

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3 0

2 years ago

An alloy is a mixture of what?

Nastasia [14]

Answer:

An alloy is a mixture of chemical elements, which form an impure substance that retains the characteristics of a metal.

Explanation:

Have a nice day. Auf Wiedersehen.

5 0

3 years ago