what is the pH of a solution that has a [H+]=1.75x10^-11

Answers

Answer 1

[tex]pH = - \log[\text{H}^{+}] = -\log \left(1.75 \times 10^{-11} \right) = 10.757[/tex]


Related Questions

How many kilograms are present in 6.78x1025molecules of Al2(SO4)3? (hint 1kg=103g)

Atomic masses:

Al = 27

S = 32

O = 16

A) 0.891kg

B) 38.5kg

C) Cannot be determined

D) 8.44kg

Answers

mol = 6.78 x 10²⁵ : 6.02 x 10²³ = 112.62

MM Al₂(SO₄)₃ = 2.27 + 3.32+12.16 =342 g/mol

mass = 112.62 x 342 = 38516.04 g = 38.5 kg

The total mass of 6.78*[tex]10^{25}[/tex] molecules of [tex]Al_{2}(SO_{4})^3[/tex] is (b) 38.5 Kg.

To calculate the mass, we need to first understand the values given in the question:1 mole of [tex]Al_{2}(SO_{4})^3[/tex] contains 6.02*[tex]10^{23}[/tex] molecules6.78*[tex]10^{25}[/tex]/6.02*[tex]10^{23}[/tex] moles are in the given amount of [tex]Al_{2}(SO_{4})^3\\[/tex]112.62 moles of  [tex]Al_{2}(SO_{4})^3[/tex] is availableWeight of 1 mole [tex]Al_{2}(SO_{4})^3[/tex] is 342 gramsHence, weight of 112.62 moles of [tex]Al_{2}(SO_{4})^3[/tex]  = 112.62*342 gramsThe total mass is equal to 38516.04 grams, which is equal to 38.5 Kg.

Hence, the total weight of 6.78*[tex]10^{25}[/tex] molecules of [tex]Al_{2}(SO_{4})^3[/tex] is (b) 38.5 Kg.

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Moles to mass
HELP PLEASE
15 pts

Answers

Explanation:

nose amigo, la verdad yo también tengo dificultades escolares muchísimas gracias, Dios te bendiga en otro idioma por cierto mi anime favorito es cowboy beboop

What effect would you expect this to have on CO2 levels in the atmosphere?

Answers

expect what to have?!?!?!?

A gas made up of homonuclear diatomic molecules escapes through a pinhole 0.378 times as fast as He gas. Write the chemical formula of the gas.

Answers

For a gas made up of homonuclear diatomic molecules escapes through a pinhole 0.378 times as fast as He gas, the chemical formula of the gas  is mathematically given as

N2(nitrogen gas)

What is the chemical formula of the gas.?

Generally, the equation for the rate to molar relationship  is mathematically given as

\frac{r1}{r2}=\frac{mm2}{mm1}

Thereofore

\frac{r}{r2}=0.378

Hence

0.378=\sqrt{\frac{4.00268}{Mx2}}

Mx2=28.013g/mol

In conclusion,The name of gas with a molar mass of 28.013g/mol is N2

Therefore, the chemical formula of the gas. is N2

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2. A 0.2719 g sample containing CaCO3 reacted with 20.00 mL of 0.2254 M HCl. Given that HCI was excess. The excess HCl required exactly 20.00 mL of 0.1041 M NaOH to reach the end-point using phenolphthalein indicator. Determine percentage purity of CaCO3 in the sample. The reraction involved is CaCO3(s) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l) The titration reaction is HC(aq) + NaOH(aq) NaCl(aq) + H₂O(1)

Answers

The calculated percentage purity of the original sample of calcium carbonate is 44%.

What is excess titration?

In the back titration of the excess acid, we neutralize the excess titrand left in a system.

We have the reaction equation;

CaCO3 + 2HCl ----> CaCl2 + H2O + CO2

To get the moles of HCl = 0.2254 M * 20/1000 L = 0.0045 moles

The reaction involving the excess acid occurs thus;

HCl + NaOH ----> NaCl + H2O

Number of moles of NaOH = 0.1041 M * 20/1000 = 0.0021 moles

We have a  1:1 hence 0.0021 moles of HCl reacted also

Number of moles of HCl that reacted with CaCO3 initially = 0.0045 moles - 0.0021 moles = 0.0024 moles

Given the stoichiometry of the reaction,  0.0012 moles of CaCO3 reacted.

Hence;

Mass of pure CaCO3 in the sample= 0.0012 moles * 100 g/mol = 0.12g

Percent purity of the sample = 0.12g/0.2719 g * 100/1

= 44%

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2. A 0.2719 g sample containing CaCO3 reacted with 20.00 mL of 0.2254 M HCl. Given that HCI was excess. The excess HCl required exactly 20.00 mL of 0.1041 M NaOH to reach the end-point using phenolphthalein indicator. Determine percentage purity of CaCO3 in the sample. The reraction involved is CaCO3(s) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l) The titration reaction is HC(aq) + NaOH(aq) NaCl(aq) + H₂O(1)

Answers

The percentage purity of the calcium carbonate is  44%. The percentage purity gives the amount of pure CaCO3 in the sample.

What is excess titration?

In excess titration or back titration, we neutralize the excess titrand left in a system.

We have the reaction;

CaCO3 + 2HCl ----> CaCl2 + H2O + CO2

Number of moles of HCl = 0.2254 M * 20/1000 L = 0.0045 moles

The reaction of the excess acid is according to the reaction;

HCl + NaOH ----> NaCl + H2O

Number of moles of NaOH = 0.1041 M * 20/1000 = 0.0021 moles

Since the reaction is 1:1, 0.0021 moles of HCl reacted also

Number of moles of HCl that reacted with CaCO3  =  0.0045 moles - 0.0021 moles = 0.0024 moles

If 2 moles of HCl reacts with 1 mole of CaCO3

0.0024 moles of HCl reacts with 0.0024 moles * 1/2

= 0.0012 moles

Mass of pure CaCO3 present = 0.0012 moles * 100 g/mol = 0.12g

Percent purity of the sample =  0.12g/0.2719 g * 100/1

= 44%

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Why is the r.a.m. value used?
A. The r.a.m. value is used to determine how many isotopes an element has.
B. None of these
C. Atoms are too small for their masses to be measured directly.
D. A single atom cannot be isolated, so only the average size of a group of atoms can be measured.

Answers

Answer:

I think the answer is going to be d A single atom cannot be isolated, so only the average size of a group of atoms can be measured. :)

Have an amazing day!!

Please rate and mark brainliest!!

Answer: A. The r.a.m. value is used to determine how many isotopes an element has.

Explanation: Founders Educere Answer

I love you fellow summer school students, good luck.

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How are Jupiter, Saturn, and Uranus similiar? How are Jupiter, Saturn, and Uranus similiar?

Question 5 options:

a They are all large, gaseous planetary bodies.


b They are all planets that are the exact same size.


c They are all the same distance from the sun.


d They all have the exact same surface temperature.

Answers

Answer:

a

Explanation:

because they all are gasses

13. Subtract 0.291 from 0.4
I need a breakdown of the answer?

Answers

-0.109 is the answer :)

You could basically just do column subtraction

Predict: How do you think you could use the Gizmo to make the color gray? _____________

_________________________________________________________________________


Observe: Change the Red, Green, and Blue values to 90. What color does this produce?

_________________________________________________________________________

Answers

The simplest way to make the color gray is by mixing white and black colors, but it can also be created by mixing colors such as red and green.

What is the grey color?

This is considered a neutral and cool color that can be naturally found in elements such as rocks.

How can you make this color by mixing other colors?Neutral gray: The eeasiest way to create this color is by mixing black and white. This would give you a very neutral gray.Other shades: It is also possible to make this color by mixing colors that are opposite in the colors scale such as:Yellow and purples.Red and green.

This would not be a neutral gray as it will resemble a little bit the original colors.

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How many grams of air are required to complete the combustion of 186 g of phosphorus (M= 31 g/mol) to diphosphorus pentoxide, assuming the air to be 23% oxygen by mass?
4P(s) + 5O2(g) — 2P2Os(s)

Answers

Answer:

1043.5 g of air  to the nearest tenth.

Explanation:

4P + 5O2 ---> 2P2O5

4*31 g P reacts with 5*32 g oxygen

124 g   ..   ..   .   ....  .   160g oxygen

186 g   ..   ..   ..   ..   ..   (160*186)/124 g oxygen

-  so the mass of air required =  [(160*186)/124] / 0.23

= 240 / 0.23

= 1043.5 g of air.

where does the beta particle come from

Answers


The beta particle, which may be either negatively charged (negatrons) or positively charged (positrons), originates from the nucleus of an atom. A beta particle is emitted from the nucleus of an atom during radioactive decay. The electron, however, occupies regions outside the nucleus of an atom.

I hope this helps! :)

25.88 grams of tin (ll) phosphate reacts with 31.73 grams of zinc.
a write a balanced chemical equation
b. what is the limiting reactant?
c. What is the excess reactant and how many moles of it are left over?
d. How many grams of of the products are produced? (2 answers)​

Answers

Explanation:

Zn + Sn3(PO4)4 = Zn3(PO4)2 + Sn - Balanced Chemical Equation

4.3 is limiting

is the answer

if you like my answer please like comment and mark me as brilliant

Order the atoms from largest to smallest: Cs , Si , Sn .

Answers

Answer:

Si, Sn, Cs

Explanation:

                       Atomic no.          Atomic radius

Silicon Si_______14___________0.117
Tin         Sn______50___________0.140
cesium Cs______55___________0.262

Silicon is the smallest among these

A gas occupies a volume of 50.0 mL at 27°C. At what temperature, in °C, would the pressure be
101.3 kPa if the volume remains constant?

Answers

Answer:

i believe 223

Explanation:

T2 + 500k = 223 C*

How can Climate Change impact the formation of Hurricanes?

I will give brainlist

Answers

Because warmer water helps fuel hurricanes, climate change is enlarging the zone where hurricanes can form

100.0 grams of water at 4.0°C is heated until its temperature is 37°C. If the specific heat of water is 4.18 J/g°C, calculate the amount of heat energy needed to cause this rise in temperature.

Answers

The amount of heat energy needed to cause the rise in temperature of the water initially at 4 degreess Celsius is 13,794 J.

Heat required to raise the temperature of the water

The quantity of heat required to raise the temperature of the water is calculated as follows;

Q = mcΔθ

where;

m is mass of the waterc is heat capacityΔθ is change in temperature

Q = 100 x 4.18 x (37 - 4)

Q = 13,794 J

Thus, the amount of heat energy needed to cause the rise in temperature of the water initially at 4 degreess Celsius is 13,794 J.

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What is the mass of 3.011 x 1023 atoms of Ca ?​

Answers

Mass of atoms of Ca is 2 g.

Answer:

2g is the answer

Explanation:

based on google

When the color changes is it a chemical change or a physical change

Answers

physical

It can be chemical but it's usually physical as the molecular structure doesn't change

Mass of 1.5 mole electron is

Answers

Mass of 1.5 mole of electron is 0.8229 mg

mass of electron = 9.11 * 10^-31 kg

mass of 1 mole of any substance ( Avagadro number ) = 6.022 * 10^23 /mol

1.5 moles of electron  = 1.5 * 6.022 * 10^23 = 9.033 * 10^23 /mol

mass of 1.5 mole of electron = 9.033 * 10^23 * 9.11 * 10^-31

mass of 1.5 mole of electron = 8.229 * 10^-7 kg

mass of 1.5 mole of electron = 8.229 * 10^-4 g

mass of 1.5 mole of electron = 0.8229 mg

Hope it helps.....

An electromagnet _____________
A. is stronger than a permanent magnet
B. points north
C. can be turned on and off
D. makes noise

I need the answer fast PLS

Answers

I think the answer is A

Answer:

C. can be turned on and off

Explanation:

An electromagnet becomes magnetic when it is part of a complete electric circuit. A switch is a part of an electric circuit that completes or break the circuit turning the circuit on and off.

(*) Sorry for my late answer but I hope this helps others that are looking for this.

I got 100%  ;)

The elements A and B combine to produce two differenr compounds. A3B and AB2. if 0.18 mol of A3B has a mass of 17.7g and 0.18 mol of Ab2 has a mass of 11.3g calculate the molar masses of both elemts a and b.​

Answers

Taking into account the definition of a system of linear equations and molar mass, the molar masses of elements A and B are 26.778 [tex]\frac{g}{mole}[/tex] and 17.998[tex]\frac{g}{mole}[/tex] respectively.

System of linear equations

A system of linear equations is a set of two or more equations of the first degree, in which two or more unknowns are related.

Solving a system of equations consists of finding the value of each unknown so that all the equations of the system are satisfied. That is to say, the values ​​of the unknowns must be sought, with which when replacing, they must give the solution proposed in both equations.

Definition of molar mass

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

Molar masses of elements A and B

Being the molar masses of the compounds:

A₃B: [tex]\frac{17.7 g}{0.18 moles} =[/tex] 98.33 [tex]\frac{g}{mole}[/tex]AB₂: [tex]\frac{11.3 g}{0.18 moles} =[/tex] 62.77 [tex]\frac{g}{mole}[/tex]

and considering the definition of molar mass of a compound, the system of equations to be solved is

[tex]\left \{ {{3mA + mB=98.33\frac{g}{mole} } \atop {mA + 2mB=62.77\frac{g}{mole} }} \right.[/tex]

where mA and mB are the molar masses of elements A and B respectively.

There are several methods to solve a system of equations, it is decided to solve it using the substitution method, which consists of clearing one of the two variables in one of the equations of the system and substituting its value in the other equation.

Isolating the variable mB from the first equation:

mB= 98.33 [tex]\frac{g}{mole}[/tex] - 3mA

and substituting in the second equation, you get:

mA + 2× (98.33 [tex]\frac{g}{mole}[/tex] - 3mA)=62.77[tex]\frac{g}{mole}[/tex]

Solving:

mA + 2× 98.33 [tex]\frac{g}{mole}[/tex] - 2×3mA=62.77[tex]\frac{g}{mole}[/tex]

mA + 196.66 [tex]\frac{g}{mole}[/tex] - 6mA=62.77[tex]\frac{g}{mole}[/tex]

mA - 6mA=62.77[tex]\frac{g}{mole}[/tex] - 196.66 [tex]\frac{g}{mole}[/tex]

(-5)mA= - 133.89 [tex]\frac{g}{mole}[/tex]

mA= (- 133.89 [tex]\frac{g}{mole}[/tex] )÷ (-5)

mA= 26.778 [tex]\frac{g}{mole}[/tex]

Remember that mB= 98.33 [tex]\frac{g}{mole}[/tex] - 3mA, replacing the value of mA:

mB= 98.33 [tex]\frac{g}{mole}[/tex] - 3×(26.778 [tex]\frac{g}{mole}[/tex])

mB= 80.334 [tex]\frac{g}{mole}[/tex]

mB= 17.998 [tex]\frac{g}{mole}[/tex]

Finally, the molar masses of elements A and B are 26.778 [tex]\frac{g}{mole}[/tex] and 17.998[tex]\frac{g}{mole}[/tex] respectively.

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A 50g of ethanol alcohol is cooled. if the amount of heat released is 4880 J, find the change in temperature if the specific heat of ethanol is 2.44 J/g.K?​

Answers

Answer:

∆ in temperature= 40K

Explanation:

H = mc∆€

m= 50g

c = 2.44 J/g.K

∆€= ?

H= 4880

∆€= 4880/(50×2.44)

∆€= 40K

A sample 0.5 mole sample of NO2 gas occupies a 0.620 L container at 25 °C. What is the pressure of this gas?

Answers

The pressure of the sample of the gas in the container at 25 °C occupying 0.62 L is 19.73 atm

Data obtained from the question Volume (V) = 0.62 L Temperature (T) = 25 °C = 25 + 273 = 298 KGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) = 0.5 mole Pressure (P) = ?

Using the ideal gas equation, the pressure of the gas can be obtained as follow:

PV = nRT

Divide both side by V

P = nRT / V

P = (0.5 × 0.0821 × 298) / 0.62

P = 19.73 atm

Thus, the pressure of the gas is 19.73 atm

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Which of the following correctly describes what happens to the kinetic energy of water when it changes from the liquic
state to the solid state?
• There is no change in the kinetic energy of the molecules.
O The kinetic of energy of the molecules increases.
• The kinetic energy of the molecules increases then decreases.
of O The kinetic energy of the molecules decreases.

Answers

Answer:

The kinetic energy decreases

Explanation:

When water freezes, it is losing heat. Heat and energy are interchangeable, meaning it loses energy.

Answer:

The kinetic energy of the molecules decreases.

Explanation:

because when temperature decreases the average kinetic energy of the gas molecules decreases as well.

The motion of gas particles is described by straight line motion, followed by a collision and a change in direction. This is know as

Answers

Answer:

It is called the Random Walk, where the next move (as seen through the motion of gas particles) depends on chance.

Explanation:

if the concentration of H+ ions in a solution is 3.16 x 10^-4 mol/L then what is the concentration of OH- ions

Answers

Answer:

10-4mol/l

[H+]=10-7 , which we call a pH of 7.

This means, for example, that a hydrogen-ion concentration of a solution with a pH of 4 is 10-4mol/l, meaning it contains 0.0001 mol of hydrogen ions in a solution of 1 liter.

Explanation:

3.12×10⁻¹⁰M is the concentration of OH⁻ ions. Concentration in chemistry refers to the quantity of a material in a certain area.

What is concentration?

Concentration in chemistry refers to the quantity of a material in a certain area. The ratio of the solvent in the solution to the solvent or whole solution is another way to define concentration. In order to express concentration, mass every unit volume is typically used. The solute concentration can, however, alternatively be stated in moles or volumetric units.

If a formula describing a shape's boundary is known, it is possible to use integral calculus to determine the volumes of more complex shapes. No object in the dimensions of zero, one, or two has volume; in the dimensions of four and above, the hypervolume is a concept similar to the standard volume.

[H⁺] [OH⁻] = 10 ⁻¹⁴

3.16 x 10⁻⁴ × [OH⁻] = 10 ⁻¹⁴

[OH⁻] = 3.12×10⁻¹⁰M

Therefore,  3.12×10⁻¹⁰M is the concentration of OH⁻ ions.

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. Define the term Flame?​

Answers

Answer:

A hot glowing body of ignited gas that is generated by something on fire.

A reversible exothermic synthesis (combination) reaction produces one mole of gaseous product from two moles of gaseous
reactant. Which set of condtions will shift the reaction farthest toward the products?
A)
low temperature, low pressure
B)
low temperature, high pressure
9
high temperature, low pressure
D)
high temperature, high pressure
A 2.0g piece of Mg reacts with HNO3. Which conditions would produce the GREATEST reaction rate?

Answers

Factors that will increase product formation are;

low temperature and high pressure increasing the surface area and concentration

What factors affect chemical equilibrium?

The position of chemical equilibrium is affected by the following factors:

temperature concentration pressure for gases

When equilibrium is altered by an external factor, the reaction shifts to annul the effect of that change.

For the reversible exothermic synthesis, low temperature and high pressure will shift the reaction farthest toward the products.

For the reaction of the 2.0g piece of Mg with HNO3. increasing the surface area of magnesium metal as well as increasing the concentration of HNO3 would produce the GREATEST reaction rate.

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I need help to balance a Balance the redox reaction under basic conditions Fe+2 +MnO4-1 ---> Fe+3 + Mn+2

Answers

Answer:

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

Explanation:

To balance any redox reaction the primary factor is to identify the species undergoing oxidation and reduction.

Below are the steps to identify species undergoing oxidation and reduction:

Calculate the oxidation number of each atom individually of reactants as well as product.find out the change in oxidation number from reactants to products.if the oxidation number of products are greater than reactants then the species undergone oxidation.if the oxidation number of products are lesser than reactants then the species undergone reduction.

let's calculate oxidation number,

given reaction

[tex]{Fe}^{ + 2} +{MnO_4}^{ - 1} \rightarrow {Fe}^{ + 3} + {Mn}^{ + 2}[/tex]

Of reactant,

[tex]Fe = +2, {MnO_4}^{ - 1} \\ Let \: oxidation \: of \: Mn \: is \: x \: and \: Oxygen -2 \\ {MnO_4}^{ - 1} \rightarrow \: x + 4 \times ( - 2) = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x + - 8 = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 8 - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 7 \\ \fbox{ Mn \: +7, O \: -2}[/tex]

Of product,

[tex]\fbox{Fe \: +3, \: Mn \: +2}[/tex]

Now calculate the change in oxidation number

[tex]Fe = +3-(+2) = +1 \\ Mn = +2-(+7) = -5[/tex]

now balance the increase in oxidation number and decrease in oxidation number,

thus we require 5 Fe for 1 MnO4-,

Now putting these numbers as their coefficient,

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2}[/tex]

now balance oxygen atom on product side by adding water,

since there are 4 oxygen atoms in reactants 4 water molecules will be there on product side.

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

now balance Hydrogen atom on reactant side by adding H+ ion, since there are 4 water molecules on product 8 H+ ion will be in reactants!

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Confirming the balanced reaction, by checking number of atoms and charge on reactant vs Product side.

Total number of Fe on reactant and product = 5

Total number of Mn on reactant and product= 1

Total number of Oxygen on reactant and product = 4

Total number of hydrogen on reactant and product= 8

Total charge on reactant side= 5×(+2)-1+8=17

Total charge on product side = 5×(+3)+1×(+2)=17

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

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