All categories

3 years ago

How many moles are there in 5.7 x 10^25 molecules of Na2SO4? *

Chemistry

1 answer:

konstantin123 [22]3 years ago

8 0

Explanation:

two moles sodium (45.98 g), one mole sulfur (32.06 g), and four moles oxygen (64.00 g) combine to form one mole of sodium sulfate (142.04 g).

You might be interested in

The substances below are listed by increasing specific heat capacity value. Starting at 30 Celsius, they absorb 100 kJ of therma

Georgia [21]

Answer:

Silver.

Explanation:

To obtain the right answer to question, let us calculate the change in temperature for each substance assuming they all have the same mass as 100g.

This is illustrated below:

1. For Siver:

Mass (M) = 100g

Specific heat capacity (C) = 0.239J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 0.239)

ΔT = 4184°C

2. For Aluminium:

Mass (M) = 100g

Specific heat capacity (C) = 0.921J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 0.921)

ΔT = 1086°C

3. For Lithium:

Mass (M) = 100g

Specific heat capacity (C) = 3.56J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 3.56 )

ΔT = 281°C

4. For water:

Mass (M) = 100g

Specific heat capacity (C) = 4.184J/g°C

Heat (Q) = 100 kJ = 100000J

Change in temperature (ΔT)

Q = MCΔT

ΔT = Q/MC

ΔT = 100000/(100 x 4.184)

ΔT = 239°C

Summary

Temperature change of each substance is given below

1. Silver => 4184°C

2. Aluminum => 1086°C

3. Lithium => 281°C

4. Water => 239°C

From the calculations made above, Silver has the highest rise in temperature.

4 0

4 years ago

Aqueous potassium bromide reacts with aqueous silver nitrate AgNO3 to form aqueous potassium nitrate KNO3 and solid silver bromi

ddd [48]

The balanced chemical equation for the reaction is as below

KBr (aq) + AgNo3 → KNO3(aq) + AgBr(s)

Explanation

from the equation above the stoichiometric coefficient before KBr is 1, before AgNo3 is 1 , before KNO3 is 1 and before AgBr is also 1. Therefore 1 mole of KBr reacted with 1 mole of AgNO3 to form 1 mole of KNO3 and 1 mole of AgBr.

8 0

3 years ago

Read 2 more answers

zimovet [89]

C) A chlorine atom can form ionic bonds by accepting an electron and covalent bonds by sharing electrons

Explanation:

The statement that best explains the behavior of chlorine is that its atom can form ionic bonds by accepting an electron and covalent bonds by sharing electrons.

To form an ionic bond, two atoms combines together via electrostatic attraction between them.
Ionic bonds are formed between metals and non-metals.
The large electronegativity difference between the two specie is the driving factor.
In forming NaCl compound, Na donates electron which is accepted by Chlorine.
This leaves a positive charge on Na and a negative charge on chlorine and the ensuing electrostatic attraction forms an ionic bond.

To form the covalent bond, the chlorine shares their valence electrons between themselves. They have an equal affinity for these electrons and this leads to the formation of a non-polar covalent bond

learn more:

Ionic bonds brainly.com/question/6071838

Polar molecules brainly.com/question/12538321

#learnwithBrainly

4 0

3 years ago

Question

AnnyKZ [126]

Blank #1: Polyatomic

Blank #2: 2 (see explanation)

Blank #3: 1 (see explanation)

<h3>Explanation</h3>

Both the ammonium ion $\text{NH}_4^{+}$ and the sulfate ion $\text{SO}_4^{2-}$ contain more than one atom in each ion. The two species are thus <em>polyatomic</em>. The chloride ion $\text{Cl}^{-}$ , for example, is <em>monoatomic</em>.

Superscripts above formulae of the ions indicate their charge. Each ammonium ion carries a positive one (+1) charge. Each sulfate ion carries a charge of negative two (-2).

Ammonium sulfate is an ionic compound. A sample of this compound contain myriads of ammonium ions and sulfate ions. The ions are packed in three-dimensional lattices. Thus unlike water, ammonium sulfate does not exist as molecules in nature.

Assuming that the second and third blanks refers to a formula unit, rather than a molecule, of ammonium sulfate. The empirical formula of ammonium sulfate gives the minimum whole-number ratio between the two ions in a sample.

Charges shall balance between the two ions. Ammonium ions are of charge +1. Sulfate ions are of charge -2. The sample shall thus contain two ammonium ions for every one sulfate ion.

The empirical formula of ammonium sulfate is therefore $(\text{NH}_4)_2\text{SO}_4$ .

There are thus two ammonium ions $\text{NH}_4^{+}$ and one sulfate ion $\text{SO}_4^{2-}$ in each formula unit of ammonium sulfate.

8 0

3 years ago

Will give brainliest <br><br> What is ozone depletion in simple words

spin [16.1K]

Answer:

Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created

7 0

3 years ago

Read 2 more answers