Ca and F what are the name of the ionic compounds

Answer:

pH = 4.95

Explanation:

The buffer was created using 4.0082g sodium acetate, mixed with 10.0 mL of 3.0 M acetic acid and 90 mL of deionized water.

Using H-H equation for acetic buffer:

pH = pKa + log [Acetate] / [Acetic acid]

Where pH is the pH of the buffer

pKa = -log Ka = 4.74

[] Are molar concentration of each specie -The volume of the solution is 100mL = 0.1L-:

[Sodium acetate] = 4.0082g * (1mol / 82.03g) = 0.04886 moles / 0.1L

= 0.4886M

[Acetic acid] = 3.0M * (10mL / 100mL) = 0.300M

pH = 4.74 + log [0.4886M] / [0.300M] =

Answer:

Permafrost is any part of the ground that remains completely frozen or colder

Answer:

Explanation:

Nitrogen is use to store semen for artificial insemination because if it's inert characteristics which it help to maintain the semen inertness and also it maintain the low temperature of the semen which is good for it's quality.

Nitrogen also help to prevent it's biological deterioration thereby maintaining it's viability and effectiveness.

Answer:

[tex]16\ \text{ppm}[/tex]

Explanation:

Mass of one tablet = 20 mg

Mass of two tablets = [tex]2\times 20=40\ \text{mg}[/tex]

Percent that is soluble in water = 40%

Mass of tablet that is soluble in water = [tex]0.4\times 40=16\ \text{mg}[/tex]

So, mass of solute is [tex]16\ \text{mg}[/tex]

Density of water = 1 kg/L

Volume of water = 1 L

So, mass of 1 L of water is [tex]1\times 1=1\ \text{kg}=1000\ \text{g}[/tex]

PPM is given by

[tex]\dfrac{\text{Mass of solute}}{\text{Mass of solvent}}\times 10^6=\dfrac{16\times 10^{-3}}{1000}\times 10^6\\ =16\ \text{ppm}[/tex]

Hence, the concentration of iodine in the treated water [tex]16\ \text{ppm}[/tex].

Answer: 25

Explanation:

The new volume will be 18 L

The volume of a dry gas of a given mass was inversely proportional to its pressure at constant temperature, according to Boyle's law. At moderate pressures and temperatures, most gases behave like ideal gases.

Calculation of new volume is shown as below:

The new volume of can be calculated by using Boyle's law.

[tex]P_{1} V_{1} = P_{2} V_{2}[/tex]

It is given that, [tex]P_{1}[/tex] = 0.9 atm. [tex]V_{1}[/tex] = 4 L, [tex]P_{2}[/tex] = 0.20 atm

Now, put the values of given data in above equation.

[tex]V_{2}[/tex] = [tex]P_{1}V_{1}[/tex] / [tex]P_{2}[/tex].

[tex]V_{2}[/tex] = (0.9) ×4 / 0.20

= 3.6 / 0.20

= 18 L

therefore, the new volume will be 18 L.

To know more about volume.

https://brainly.com/question/2098026.

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Answer:

3.30 gSiO2 / 60.085g SiO2 x 2 mol 0 / 1 mol SiO2 x (6.022*1023 ) = 6.61*1022 O atoms

Explanation:

Answer:

The correct option is (3).

Explanation:

The ideal gas equation is given by :

[tex]PV=nRT\\\\V=\dfrac{nRT}{P}[/tex]

The pressure of ideal gas is directly proportional to temperature and inversely proportional to its volume.

We can say that the volume of a 1.00-mole sample of an ideal gas will decrease when the pressure increases and the temperature decreases.

The volume of the idea gas decrease when pressure increases and the temperature decreases. Thus option C is correct.

The ideal gas equation can be given as:

PV = nRT

The equation in terms of pressure and temperature when n=1 can be written as:

Volume = [tex]\rm \dfrac{RT}{P}[/tex]

Accordingly, the volume has been directly proportional to the temperature and has been inversely proportional to the pressure.

Thus, with the decrease in volume, there has been an increase in pressure and a decrease in temperature.

Thus, option C is correct.

For more information about the ideal gas, refer to the link:

https://brainly.com/question/8711877

Answer:

0.015M is the final molarity of the NaOH solution

Explanation:

A solution of 0.040M NaOH is diluted from 150mL to 250mL + 150mL = 400mL. That means the solution is diluted:

400mL / 150mL = 2.667 times.

As the original solution has a concentration of 0.040M, the diluted solution has a concentration of:

0.040M / 2.667 =

Answer:

d

Explanation:

its artist school kills artists

Answer:

Hello There!!

Explanation:

The answer is D.artists because they trigger colors.

hope this helps,have a great day!!

~Pinky~

Answer:

Explanation:

Erosion is the movement of sediment from one place to another. Erosion is the mechanical process of wearing or grinding somethin down. It condition in which the earth’s surface is worn away by the action of water and wind.

Therefore, the final answer is Erosion.

Answer:

J 9. , indicates the most sudden change in temperature

Explanation:

this is the correct answer

just down of compact bone there is spongy bone

mark me

Answer:

B

Explanation:

from the diagram.... the population of africa increases so..... ofcourse it exceeds its death rate ....

that's all .... have fun

Answer:

It does not change and object's mass

Answer:

B. Ksp = 1.7 × 10¯⁷

Explanation:

Hello there!

In this case, for this solubility equilibrium problem, we first need to set up the chemical reaction describing the dissolution of the involved salt, CuCl:

[tex]CuCl(s)\rightleftharpoons Cu^+(aq)+Cl^-(aq)[/tex]

Next, we write the corresponding equilibrium expression:

[tex]Ksp=[Cu^+][Cl^-][/tex]

Now, we need to calculate the concentrations of copper (I) and chloride ions at equilibrium; thus, given that 0.041 g of this solid is completely dissolved in 1.0 L of solution, we can firstly calculate the moles present in the solution:

[tex]n_{CuCl}=0.041gCuCl*\frac{1molCuCl}{99gCuCl} =4.14x10^-4mol[/tex]

Afterwards, since all the species in the reaction, CuCl, Cu+ and Cl- are in a 1:1:1 mole ratio, we realize that those moles correspond to ions in the solution, so their concentrations are:

[tex][Cu^+]=[Cl^-]=\frac{4.14x10^{-4}mol}{1.0L}= 4.14x10^{-4}M[/tex]

Then, we compute the Ksp by plug this value in the equilibrium expression:

[tex]Ksp=(4.14x10^{-4})(4.14x10^{-4})=1.7x10^{-7}[/tex]

Thus, the answer would be B. Ksp = 1.7 × 10¯⁷.

Regards!

Answer:

hope yall have agreat day

Explanation

Explanation:

I don't understand the question

Answer:

Reported speech is often called indirect speech. Reported speech is the speech in which someone says that someone told something.

For example:

1. The English teacher said that she would take our test on Monday.

2. Mr. James said that he was not feeling well due to dry weather.

Did you observe the tense of the reported speech? It is in past form. In reported speech always use past tense.

Answer:

-18.54kJ of energy would be released

Explanation:

The enthalpy of crystallization is defined as the heat released when 1 mole of a substance change its state from liquid to solid. The ΔHcrystallization of acetic acid is -11.72kJ/mol (ΔHcrystallization = - ΔHfusion).

To solve this question we must convert the mass of acetic acid to moles in order to find the heat released:

Moles acetic acid -Molar mass: 60.052g/mol-:

95.0g * (1mol / 60.052g) = 1.58 moles

Heat released:

1.58 moles * (-11.72kJ/mol) =

Explanation:

the volume and temperature of a gas have a ditect relationship,as the temperature increases the volume also increases when pressure is held constand, heating the gas increases the kinetic energy of the particles or atoms,causing the gas to expand until the pressure returns to its original value

Answer:

alpha particle needs to be added to the equation.

Explanation:

Given;

atomic mass of Americium = 241

atomic mass of neptunium = 237

The difference in atomic mass of the radioactive elements given is calculated as;

241 - 237 = 4

The particle with atomic mass of 4 is alpha particle usually represented with helium atom.

Am²⁴¹ -----> He⁴ + Np²³⁷

Thus, alpha particle needs to be added to the equation.

Answer:

4/2 HE

Explanation:

a p e x!

Answer:

Anything that takes up space and has mass

Answer:

158.5g Zn are produced

Explanation:

To solve this question we have to find the moles of Aluminium. With the moles of Aluminium and the balanced reaction we can find the moles of Zn and its mass as follows:

Moles Al -Molar mass: 26.98g/mol

43.6g Al* (1mol/26.98g) = 1.616 moles Al

Moles Zn:

1.616 moles Al * (3mol Zn / 2mol Al) =

2.424 moles Zn are produced

Mass Zn -Molar mass: 65.38g/mol-

2.424 moles Zn * (65.38g / mol) =

Answer:

0.32 mole

Explanation:

From the question given above, the following data were obtained:

Initial mole (n₁) = 0.31 mole

Initial pressure (P₁) = 742 torr

Final pressure (P₂) = 759 torr

Final mole (n₂) =?

The final mole of the gas in the drum can be obtained as follow:

P₁/n₁ = P₂/n₂

742 / 0.31 = 759 / n₂

Cross multiply

742 × n₂ = 0.31 × 759

742 × n₂ = 235.29

Divide both side by 742

n₂ = 235.29 / 742

n₂ = 0.32 mole

Thus, the final mole of the gas in the drum is 0.32 mole

Answer:

A) Temperature

Explanation:

The independent variable is the variable that the researcher changes. In this case, that's the temperature because there is hot, warm, and cold.

The food dye is the constant.

The water and time it takes for dye to mix are the dependent variable since they depend on the independent variable (the temperature)

Answer:

[tex]\boxed {\boxed {\sf \frac {1}{3} \ mol \ Al_2O_3 \approx 0.34 \ mol \ Al_2O_3}}[/tex]

Explanation:

We will use stoichiometry to solve this problem. The reaction given has a formula of

[tex]4Al+3O_2 \rightarrow 2Al_2O_3[/tex]

The coefficients tell us the number of moles necessary for the reaction.

The reaction requires 3 moles of oxygen to produce 2 moles of aluminum oxide. We can make a ratio.

[tex]\frac {3 \ mol \ O_2}{ 2\ mol \ Al_2O_3}}[/tex]

Since we are doing the reaction with 0.5 moles of oxygen, we multiply the ratio by that number.

[tex]0.5 \ mol \ O_2 *\frac {3 \ mol \ O_2}{ 2 \ mol \ Al_2O_3}}[/tex]

Flip the ratio so the moles of oxygen cancel each other out.

[tex]0.5 \ mol \ O_2 *\frac {2 \ mol \ Al_2O_3}{ 3 \ mol \ O_2}}[/tex]

[tex]0.5 *\frac {2 \ mol \ Al_2O_3}{ 3 }[/tex]

[tex]\frac {1 \ mol \ Al_2O_3}{ 3 }[/tex]

[tex]\frac {1}{3} \ mol \ Al_2O_3 = 0.33333 \ mol \ Al_2O_3 \approx 0.34 \ mol \ Al_2O_3[/tex]

0.5 moles of oxygen produces 1/3 or approximately 0.34 moles of aluminum oxide.

Answer:

A

Explanation:

According to Charles Law, volume is directly proportional to absolute temperature so because temperature is being decreased in this case, the volume will also decrease.

Answer:

C. Both processes convert mass into energy.

Answer:

HE

Explanation:

HE is a noble gas