Determine the molarity for a solution of 29.2 g of NaCl is dissolved into 0.50 L of water. Convert the grams to moles using molar mass of NaCl = 58.45 g/mol.

A spontaneous reaction favours the product formation and increases the entropy of the isolated system.  The sign of the entropy change will be negative as the product formation is less random.

Entropy is the degree of the disorder or randomness that occurs in the system that lacks available energy and cannot convert the mechanical energy or work.

The entropy of the reaction will be negative as the reactants are present in the gaseous state and the product formed is solid. The product formation was spontaneous and less random.

Therefore, option a. entropy will be negative as product formation is less random.

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Answer:

Explanation

Explanation:

Let's say that in an environment, the trees are turning yellow (this is obviously made up) and there are green butteflies and red birds that hunt the butterflies. Both will need to evolve, or else they will both be spotted by predators, like snakes can eat the birds, and those birds eat the butterflies.

Answer:

Anaerobic respiration is the type of respiration through which cells can break down sugars to generate energy when oxygen isnt there

Explanation:

hope this helps!

Anaerobic respiration occurs without oxygen and releases less energy but more quickly than aerobic respiration.

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A photosynthetic reaction is the formation of the glucose and oxygen molecule by water and carbon dioxide. 12 moles of water will be used in the reaction.

Moles are the ratio of the mass of the substance to the molar mass of the substance.

In the photosynthetic reaction, 6 moles of carbon dioxide and 6 moles of water are utilized to produce 1 mole of a glucose molecule and 6 moles of oxygen.

From this, it can be said that the number of moles consumed of carbon dioxide and water will be equal and in the ratio of 1:1.

The number of moles of carbon dioxide will be equal to that of the water molecule and will also be equal to the ratio of the mass of carbon dioxide to the molar mass of carbon dioxide.

The moles of water will be calculated as:

[tex]\begin{aligned}\rm moles &= \rm \dfrac{\text{mass of CO}_{2}}{\text{molar mass of CO}_{2}}\\\\&= \dfrac{528}{44.01}\\\\&= 12\;\rm moles\end{aligned}[/tex]

Therefore, option A. 12 moles of water will be used.

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Answer:

the second object had a weaker charge

Explanation:

the charged object had a stronger charge and opposite to that of the uncharged hence causing attraction

Answer:

d

Explanation:

The second object had a weaker charge.

Answer:

Explanation:

Hope it helps!!!!

Answer:

i'm attaching the report i made

Explanation:

(It does include the chart information)

hope this helps! have a wonderful day :)

The solubility of a solid solute increases with temperature.

The solubility of a solute is the amount of solute that dissolves in a given volume of solvent at a particular temperature.

The solubility of a solute increases with increase in temperature.

Based on the lab results, it was seen that with increase in temperature, the mass of sugar that dissolves in water increases.

50 mL of water at 2 °C dissolved only 80 g of sugar whereas at 102 °C, 250 g of sugar dissolved.

Therefore, it can be concluded that solubility of a solute increases with temperature.

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The term rate of reaction, RR, refers to the speed at which the reactants of a chemical reaction are turned into products. A) RR = 0.0047 M/s; B) RR = 0.0038 M/s; C) 0.0019 M/s.

When talking about the rate of reaction we refer to the speed at which a chemical reaction occurs, turning reactants into products.

It can be measured as

The formula to calculate the rate of reaction is the following,

RR = Δ concentration / Δ Time

Where,

In the exposed example, the chemical reaction is

                              NO₂(g) → NO(g) + 12 O₂(g)

So the rate of reaction can be measured according to

Since the collected data was the concentration of NO₂ as a function of time, then the rate of reaction was measured as the speed at which NO₂ was consumed.

A. What is the average rate of the reaction between 10 and 20 s?

Available data

RR = Δ concentration / Δ Time

RR = (0.951 - 0.904) / 20 - 10

RR = 0.074 / 10

RR = 0.0047 M/s

B. What is the average rate of the reaction between 50 and 60 s?

Available data

RR = Δ concentration / Δ Time

RR = (0.778 - 0.740) / 60 - 50

RR = 0.038 / 10

RR = 0.0038 M/s

C. What is the rate of formation of O₂ between 50 and 60 s?

Now, since NO₂ turns into NO and O₂, then

                  RR = Rate of NO₂ consumed = 2x rate of O₂ produced

If RR between 50 and 60 s is 0.0038 M/s, then the rate of formation of O₂ is,

Rate of NO₂ consumed / 2 =  rate of O₂ produced

0.0038 M/s / 2 = rate of O₂ produced

0.0019 M/s = rate of O₂ produced

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Moles are the proportion of the mass of the substance and that of the molar mass of the substance. The number of moles of iron (II) hydroxide will be 1.81 mol.

A mole is the measuring unit of the chemistry that measures even the small number of atoms, molecules and ions of the given compound. It can be given as the division of the mass from the molar mass.

The balanced chemical reaction can be shown as:

[tex]\rm FeCl_{2} + 2KOH \rightarrow Fe(OH)_{2} + 2KCl[/tex]

In the question, the number of the moles of iron (II) chloride is 4.15 mol and of potassium hydroxide is 3.62 mol.

From the reaction, it can be said that the ratio of the moles of potassium hydroxide and iron (II) hydroxide is 2:1.

The number of moles of iron (II) hydroxide is calculated as:

[tex]\begin{aligned}\rm n(Fe(OH)_{2}) &=\rm \dfrac{n(KOH)}{ 2}\\\\&= \dfrac{3.62}{2}\\\\&= 1.81 \;\rm mol\end{aligned}[/tex]

Therefore, option A. 1.81 mol is the moles of iron (II) hydroxide that will be produced.

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If there are 12 moles of NH4Cl produced, how many grams of FeCl3 did you start with?

Given 12 moles of NH4Cl is produced in the end which means 12 moles of Cl2 is used .

So ,

1 mole of FeCl3 gives -> 3 moles of Chlorine.

⅓ moles of FeCl3 gives -> 1 mole of Chlorine.

12× ⅓ moles of FeCl3 gives -> 12 moles of Chlorine.

4 moles of FeCl3 gives -> 12 moles of Chlorine.

Answer:

135 g

Explanation:

Molar mass of 3O₂ = 3 × 16 × 2 = 96

Molar mass of 2SO₃ = 2 ( 32 + 16 × 3 )= 160

moles of 3O₂ = 96.0 g / 96 g/mol = 1

moles of 2SO₃ = x g / 160 g/mol

1 = x/160

x = 160 g

160 × 84.5% = 135.2

Answer:

Energy is absorbed

Explanation:

since 1932 i learn this

Answer:

285

Explanation:

The correct statement will be"The largest source of background ionizing radiation in the United States is Radon (Rn)which is formed in the decay series of uranium."

Generally, Ionizing radiation is simply defined as a state of energy that works by releasing electrons from their parent atoms or the molecules of materials.

In conclusion, Radon (Rn) a chemical element of Group 18 in the periodic table is the largest source of background ionizing radiation in the United States.

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Answer:

It is a noble gas.

Explanation:

The element in question is helium, a noble gas. It has a full shell of eight valence electrons like all the other noble gases, which means that it does not have to react with other elements in order to obtain a full octet of valence electrons. This means that it does not react with other elements.

Note:-

In between these 30 elements ,there is carbon and hydrogen present who has infinite no of organic compounds .So just mentioning the common compounds

Here we go

Explanation:

well, I dunno if I'm correct but I think it's a physical change cause no new substance is formed

The molarity of 25.00 grams of powdered AgNO3 added to 500.00mL of pure water is 0.29 mol/L

From the question, we are to determine the molarity of the solution prepared.

First, we will determine the number of moles of AgNO₃ present.

Using the formula,

[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]

From the given information,

Mass = 25.00 g

Molar mass = 169.874 g/mole

Number of moles = [tex]\frac{25.00}{169.874}[/tex]

Number of moles of AgNO₃ present = 0.147168 mole

Now, for the molarity of the solution

[tex]Molarity = \frac{Number\ of\ moles}{Volume}[/tex]

From the given information,

Volume = 500.00 mL = 0.5 L

Molarity = [tex]\frac{0.147168}{0.5}[/tex]

Molarity = 0.294336

Molarity ≅ 0.29 mol/L

Hence, the molarity of 25.00 grams of powdered AgNO3 added to 500.00mL of pure water is 0.29 mol/L

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Answer:

The percent composition of a compound is the calculated measure of each ... A sample of a liquid with a mass of 8.657 grams was discovered into its elements ad gave 5.217 grams of carbon, 0.9620 grams of hydrogen, and 2.478 grams of oxygen. ... mass of oxygen = 2.478 grams ... 14.01 g/mol x100 = 3.03 g/mol x 100.

Hope this helps, please let me know If I'm wrong.

Answer:

an earthquake

Explanation:

According to molar concentration, four liters of solvent would be needed to create a 5.5 M solution from 22 moles of sodium chloride.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters. Substitution of values in formula gives, volume= 22/5.5=4 liters.

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~Shoto Todoroki here~

Except for Pluto, the outer planets are alike in a lot of ways. They are much bigger than the inner planets. They are made mostly of hydrogen and helium. The hydrogen and helium are in the form of gas in the planets' atmospheres.

hope this helps :D

Answer:

The atmospheres of outer planets are made of hydrogen and helium, so that should help.

Explanation:

wat exactly do u need to do here?

Answer:

A

Explanation:

Answer:

B. Changes in odor, color, and temp

Explanation:

The others are physical changes

Answer:

I dont quit understand this question.

Explanation:

Try typing it again

Answer:

The locations of the volcanoes tend to be close/on the earthquake lines/zones and this is because earthquake activity forms mountains/volcanoes and also causes those volcanoes to erupt. The reason the earthquake zones are long lines is because earthquakes usually happen on fault lines, or where two tectonic plates are next to each other. These plates are like a jigsaw puzzle, as in, they are everywhere making up the pieces of the surface of the globe.  So that's why they are long lines.