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Answer:

At 10 ∘C , the solubility of potassium chloride is measured to be 31.2⋅g per 100⋅g of water.

Explanation:

Answer:

29% is the final concentration

Explanation:

To solve this question we must find the volume of ethanol added and the volume of the whole solution. The concentration will be:

Volume ethanol / Total volume * 100

Volume ethanol:

10mL * 70% = 7mL ethanol

+

20mL * 80% = 16mL ethanol

= 23mL ethanol

Total volume:

10mL + 20mL + 50mL = 80mL

Concentration:

23mL / 80mL * 100

= 29% is the final concentration

Answer:

A solution of sugar that contains the maximum amount of sugar that will dissolve is a saturated solution.

Explanation:

A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature.

for you the solute is sugar

Answer:

The equilbrium constant is 179.6

Explanation:

To solve this question we can use the equation:

ΔG = -RTlnK

Where ΔG is Gibbs free energy = 12.86kJ/mol

R is gas constant = 8.314x10⁻³kJ/molK

T is absolute temperature = 298K

And K is equilibrium constant.

Replacing:

12.86kJ/mol = -8.314x10⁻³kJ/molK*298K lnK

5.19 = lnK

e^5.19 = K

179.6 = K

Answer:

Sodium citrate is a compound with a total of 21 atoms

Answer:

2.54 L

Explanation:

Step 1: Write the balanced neutralization equation

6 HCl + Fe₂O₃ → 3 H₂O + 2 FeCl₃

Step 2: Calculate the moles corresponding to 339 g of Fe₂O₃

The molar mass of Fe₂O₃ is 159.69 g/mol.

339 g × 1 mol/159.69 g = 2.12 mol

Step 3: Calculate the moles of HCl that react with 2.12 moles of Fe₂O₃

The molar ratio of HCl to Fe₂O₃ is 6:1. The reacting moles of HCl are 6/1 × 2.12 mol = 12.7 mol

Step 4: Calculate the volume of HCl

12.7 moles are in 5.00 M (5.00 mol/L) HCl. The required volume is:

12.7 mol × 1 L/5.00 mol = 2.54 L

Answer:

As we move from left to right across a period, the ionization energy of elements increases. This is due to the decrease in the size of atoms across a period.

Answer:

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____________________

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# ꧁❣ RainbowSalt2²2² ࿐

Answer:

(CH3)2CHCH2COCH3

Explanation:

Answer:

Think of it this way If you have a phosphorus atom whats its oposites once you found that out you may be able to find the answer

Explanation:

Hope this helps :)

Answer:

0.285577616426424

Explanation:

Hope this helps!

Answer

0.32 is that answer

Explanation:

you just use the calculator

The pH would be 3.16 because the formula for finding the pH from a H± ion is pH = -log [H±]

So with that formula, you first have to substitute the H± with your numbers which in this case is 6.9 × 10^-4.

It should like this:

pH = -log (6.9 × 10^-4)

And lastly, just calculate.

pH = 3.16

Hope that helps, do let me know if you need more help in understanding this!

Answer: 1+charge

Explanation: hoped this helped:)

The formulas for the binary ionic compounds are:

We want to write the formulas of different binary ionic compounds. to do so, we need to consider the octet's rule.

The octet's rule establishes that atoms will lose, gain or share electrons to achieve the electron configuration of the nearest noble gas (8 valence electrons except for He with 2).

K has 1 valence electron so it will lose 1 electron to form K⁺. I has 7 valence electrons so it will gain 1 electron to form I⁻. The neutral compound between K⁺ and I⁻ is KI.

Mg has 2 valence electrons so it will lose 2 electrons to form Mg⁺². Cl has 7 valence electrons so it will gain 1 electron to form Cl⁻. The neutral compound between Mg⁺²⁺ and Cl⁻ is MgCl₂.

Na has 1 valence electron so it will lose 1 electron to form Na⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Na⁺ and S⁻² is Na₂S.

Al has 3 valence electrons so it will lose 3 electrons to form Al³⁺. S has 6 valence electrons so it will gain 2 electrons to form S⁻². The neutral compound between Al³⁺ and S⁻² is Al₂S₃.

Al has 3 valence electrons so it will lose 3 electrons to form Al³⁺. N has 5 valence electrons so it will gain 3 electrons to form N³⁻. The neutral compound between Al³⁺ and N³⁻ is AlN.

The formulas for the binary ionic compounds are:

Learn more about binary compounds here: https://brainly.com/question/7960132

Answer:

Explanation:

The number of molecules can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 3 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer: OB. 1.806 x 1024

Explanation:

Answer:

Percentage yield = 61.7%

Explanation:

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

2AgNO₃ + Cu —> Cu(NO₃)₂ + 2Ag

Next, we shall determine the mass of AgNO₃ that reacted and the mass of Ag produced from the balanced equation. This is illustrated below:

Molar mass of AgNO₃ = 108 + 14 + (16×3)

= 108 + 14 + 48

= 170 g/mol

Mass of AgNO₃ from the balanced equation = 2 × 170 = 340 g

Molar mass of Ag = 108 g/mol

Mass of Ag from the balanced equation = 2 × 108 = 216 g

SUMMARY:

From the balanced equation above,

340 g of AgNO₃ reacted to produce 216 g of Ag.

Next, we shall determine the theoretical yield of Ag. This can be obtained as follow:

From the balanced equation above,

340 g of AgNO₃ reacted to produce 216 g of Ag.

Therefore, 51 g of AgNO₃ will react to produce = (51 × 216)/340 = 32.4 g of Ag.

Thus, the theoretical yield of Ag is 32.4 g.

Finally, we shall determine the percentage yield of Ag. This can be obtained as follow:

Actual yield = 20 g

Theoretical yield = 32.4 g

Percentage yield =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 20 / 32.4 × 100

Percentage yield = 61.7%

Answer:

The average kinetic energy has increased. More molecules have a higher energy level.

Explanation:

I so esay

Answer:

option first is right answer

Answer:

mixtures are physically combined structures that are separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.

Explain:

yw

ask your mom and your family

Answer:

Pure substances are further divided into elements and compounds. The combination of two or more pure substances is called a mixture. Mixtures can be classified into two types viz. heterogeneous and homogeneous mixtures.

Explanation:

Answer:

Explanation:

i try to help you

✧Kindly see the attached picture! ☄

♪ Hope I helped! ♡

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Answer:

a. 87.8g/mol is the molar mass of the acid.

b. The answer is in the explanation.

Explanation:

To solve this question we must find the moles of the monoprotic acid using the reaction with NaOH (1mole of monoprotic acid reacts with 1 mole of NaOH). With the moles and the mass of the unknown we can find the molar mass.

Moles of NaOH added:

0.04121L * (0.150moles / L) = 6.1815x10⁻³ moles NaOH = Moles monoprotic acid

Molar mass is:

0.543g / 6.1815x10⁻³ moles = 87.8g/mol is the molar mass of the acid

b. I can't see the image you are giving because has a low resolution. But the identity of the acid can be obtained because the acid:

Has the same molar mass.

Is a monoprotic acid.

(a) The molecular mass of the unknown monoprotic acid will be 87.84 g/moles.

(b) The acid can be butyric acid, as it is a monoprotic and have mass near about 87.84 g/mol.

(a) The endpoint by the addition of NaOH has been reached when the monoprotic acid has been completely utilized. Since the NaOH has been monobasic. The moles of NaOH will be equal to the moles of acid.

Moles of NaOH = moles of acid

The molarity of NaOH = 0.15 M

Volume of NaOH = 41.21 ml

Molarity = [tex]\rm \dfrac{moles}{volume\;(L)}[/tex]

Moles = molarity [tex]\times[/tex] volume (L)

Moles of NaOH = 0.15 [tex]\times[/tex] 0.04121 L

Moles of NaOH = 0.00618 moles

Moles of NaOH = moles of acid

moles of acid = 0.00618 moles.

Mass of acid dissolved = 0.543 grams

Molecular weight of acid = [tex]\rm \dfrac{weight}{moles}[/tex]

Molecular weight of acid = [tex]\rm \dfrac{0.543}{0.006815}[/tex]

Molecular weight of acid = 87.84 g/moles.

(b) The acid with the molecular mass of 87.84 g/mol with being the monoprotic acid can be butyric acid. The butyric acid has a molecular weight of 88 g/mol.

For more information about monoprotic acid, refer to the link:

https://brainly.com/question/22497931

Answer:

5.6 m/s

Explanation:

Given,

First number = 13.254 m/s

Second number = 7.7 m/s

We need to find the difference between these two numbers. First we round off 13.254 to one decimal place i.e. 13.254 = 13.3 m/s

The difference between them is given by :

D = 13.3 - 7.7

= 5.6 m/s

Hence, the difference of the two numbers is 5.6 m/s.

Answer:

Kc = 0.5951 (4 sig. figs.)

Explanation:

For A + B ⇄ C + D at standard thermodynamic conditions (298K, 1atm)

ΔG = ΔG° + R·T·lnQ => 0 = ΔG° + R·T·lnKc => ΔG° = - R·T·lnKc

=> lnKc = - ΔG°/R·T

ΔG° = +12.86 Kj/mol

R = 8.314 Kj/mol·K

T = 298K

lnKc = - (+12.86Kj) / (8.314Kj/mol·K)(298K) = - 0.519 mol⁻¹

Kc = e⁻⁰°⁵¹⁹ mol⁻¹ = 0.5957 mol⁻¹ (4 sig. figs.)

Answer:

Option B, HCO3 1-

Explanation:

The valence of Sodium ion is +1 and the valence of HCO3 is -1. Thus, sodium ion has an extra electron to be donated to complete its outer shell  while HCO3 needs an electron to complete its outer shell

Hence Na will combine with HCO3 to form NaHCO3

Option B is correct

The polyatomic ion which will form an ionic compound with a single sodium ion is; HCO3 ¹-

In chemical bonding between ions;

The major criteria is a balance of charges within the compound formed.

As such, all polyatomic ions in the option are di-ionic except for HCO3 1- which can perfectly form an ionic compound with 1 single sodium ion.

Read more on ionic compounds:

https://brainly.com/question/13539062