How many moles are in 24.3g of iron (II) oxide?

Answer:

0.28M H2SO4

Explanation:

The molarity of a solution is defined as the ratio between the moles of the solute (In this case, H2SO4) and its volume in liters.

In the problem, the volume of the solution is increased from 125mL to 250mL. That means the solution is diluted:

250mL / 125mL = 2 times.

As the solution is diluted 2 times, the concentration is decreased in 2, that is:

0.56M / 2 =

Answer: There are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].

Explanation:

Given: Moles of [tex]NH_{3}[/tex] = 6.71 mol

According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{22}[/tex] molecules.

Therefore, molecules present in 6.71 moles are calculated as follows.

[tex]Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}[/tex]

Thus, we can conclude that there are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].

Answer:

The answer is below

Explanation:

Certain countries like Germany under Adolf Hitler favored military solutions to the great depression because the government felt that having a mass production of military weapons and recruitment of unemployed people or citizens into the army would change the dire situation.

On the other hand, countries like the United States did not favor the military solutions but instead choose the NEW DEAL under Franklin D Roosevelt; the reason could be linked to their democratic culture, the isolation belief tendency.

Answer:

n=4

Explanation:

n= (154.75×28.40)÷(68.45×18)

n=3.5

n=4(approximately)

Answer:please see explanation for answers

Explanation:

Water conservation is an approach geared towards controlling how water is used. Because of the ever growing population, which weighs so much on water available to mankind,Over negligence and abuse of our water resources have been a great point of concern, that is why the need for the knowledge of water conservation is preached.

Now, some of the ways we can conserve water include

1. Putting off taps while lathering the hands with soap

2.use of irrigation system to water crops and plants

3.. while brushing, make sure to turn off the tap or faucet

4. use a shower rather than a bath

Answer: 0.03798 kilograms

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar Volume}}=\frac{12L}{22.4L}=0.535moles[/tex]

1 mole of chlorine gas [tex](Cl_2)[/tex] weighs = 71 g

Thus 0.535 moles of chlorine gas [tex](Cl_2)[/tex] will weigh = [tex]\frac{71}{1}\times 0.535=37.98g=0.03798kg[/tex]            (1kg=1000g)

Thus there are 0.03798 kilograms in 12 L of chlorine gas.

Answer:

Concrete

Explanation:

Answer:

Explanation:

Each particle, or corpuscle, of water is a regular icosahedron (20-sided geometrical solid). This is what water particles look like, according to Plato's description in the Timaeus. In the center is the water-particle Plato describes at 55b, with 6 scalene triangles making up each equilateral face of the icosahedron

Answer:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Explanation:

Hello there!

In this case, when referring to single replacement reactions, it is crucial for us to figure out the formula of the starting reactants; thus, we know zinc is Zn and lead (IV) chloride is PbCl₄. In such a way, the reaction proceeds as follows:

[tex]Zn+PbCl_4\rightarrow ZnCl_2+Pb[/tex]

Which must be balanced as shown below:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Regards!

Answer:

0.502mol

Explanation:

The balanced chemical equation of the reaction described in this question is as follows:

2KClO3 → 2KCl+ 3O2

According to the equation above, 2 moles of KClO3 will produce 2 moles of KCl.

Using mole = mass/molar mass to convert mass of KClO3 to moles

Molar mass of KClO3 = 39 + 35.5 + 16(3)

= 39 + 35.5 + 48

= 122.5g/mol

mole = 61.5 g ÷ 122.5g/mol

mole = 0.502mol

Since 2 moles of KClO3 will decompose to produce 2 moles of KCl.

0.502 mol of KClO3 will decompose to produce 0.502 × 2/2

= 0.502mol of KCl.

Answer:

Arrow B

Explanation:

Answer:

im not sure

Explanation:

Answer:

.biology and maybe physics

Answer:

Biologist

ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.

Answer:

a

Explanation:

me say so

Answer:

C

Explanation:

Answer:

C. Endothermic

Explanation:

Since the products potential energy is higher than the reactants potential energy, it has abosrbed energy, thus making the graph endothermic.

Answer:

612.2kJ are produced

Explanation:

Based on the reaction:

2P + 5Cl₂ → 2PCl₃  + 886.0kJ

When 2 moles of P react with an excess of chlorine 886.0kJ are produced (That is 886.0kJ / 2mol P).

To solve this question we must use the last statement as follows:

1.382mol P * (886.0kJ / 2mol P) =

Answer:

The answer is gamma rays.

Explanation:

Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies on the electromagnetic spectrum.

Answer:

electricity

Explanation:

A circuit is used in every electrical and electronics operation.

Answer:

jkrifhcuhixjck

gvudd

Explanation:

dugucdsorfooggigj

a CUCO3(s) + ( I don't have the symbol on my phone ) delta CUo(s) + CO2(g)

b NH4NO3➡️ HNo3 + H2O

c. Ba(OH)2+CO2 ➡️ BaCO3+H20

d Na +H20 ➡️NaOH +h2

Explanation:

I think this should be it , I think that 8s the symbol for hydrogen gas if its not correct I'm sorry

The most important factor to be considered in order for a radioisotope to provide accurate dating simply is:

The half-life should be similar to the age of the object.

The correct answer choice is option a.

Half-life of radioisotope helps in determining dating accurately simply because it helps to predict the amount of radioactive substance remaining after a given period of time.

In conclusion, it can be perfectly deduced from the explanation given above that the half-life of a radioisotope usually, frequently and most of the time helps to determine the rate at which these substances decay.

Read more on radioisotope:

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Answer:

Molarity of 40 ml of NaoH is 0.3125 mL

Explanation:

As we know  

Molarity of acid *  volume of acid = molarity of base * volume of base

Substituting the given values, we get  

[tex]0.5 * 25 = X* 40 \\X = \frac{0.5*25}{40} \\X = 0.3125[/tex]

Molarity of 40 ml of NaoH is 0.3125 mL

Answer:

1.204 × 10^24 formula units

Explanation:

Using the following formula to convert mass of iron (III) chloride to moles;

mole = mass/molar mass

Molar mass of FeCl3 = 56 + 35.5(3)

= 56 + 106.5

= 162.5g/mol

Mole = 325/162.5

mole = 2mol

Next, to calculate the formula units of FeCl3, we multiply the number of moles of FeCl3 by Avagadro number (6.02 × 10^23)

Formula units of FeCl3 = 2 × 6.02 × 10^23

12.04 × 10^23

= 1.204 × 10^24 formula units.

Answer:

72g

Explanation:

The balanced equation of the reaction between Magnesium (Mg) and hydrochloric acid (HCl):

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)

Based on this equation, 1 mole of Mg needs to react with 2 moles of HCl.

Hence, 6 moles of HCl will need to react with 6 × ½ = 3 moles of Mg.

Using the formula; mole = mass/molar mass

Molar mass of Mg = 24g/mol

3 = mass/24

mass = 72g.

Answer:

wdym??

Explanation:

Answer:

wdym by water, soil, temperature, space?

Answer:

B

Explanation:

the pH scale is based on the function

1x10-14

So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.

The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.

pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:

pH = - log [H⁺]

[H⁺] = 10⁻⁷

= 1 × 10⁻⁷

The hydroxide concentration from hydrogen concentration is calculated as:

[H⁺][OH⁻] = 1 × 10⁻¹⁴

[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)

= 1 ×10⁻⁷

Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.

Learn more about hydroxide concentration here:

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Answer:

Do Nothing

Explanation:

Charges are transferred by friction when two different types of bodies are rubbed together. This is known as charging by friction.

However, when two materials of the same type are rubbed together, no charge is transferred from one object to the other hence there is no transfer of charges by friction and none of the two glass rods are charged.

Therefore, when one of the glass rods is brought close but does not touch the pith ball, nothing happens.