The PH of a solution of Hcl is 2.find out the amount of acid present in a litre of the solution ​

Answers

Answer 1

Answer:

The solution is 10^-2 or 0.01M in HCl.

Explanation:

meaning of pH is "power of hydrogen".

what is the molar concentration of a HCl solution with pH=2?

Let say pH=2

[H+]=10^-2M

HCL is a strong acid that dissociates completely:

[H+]=[HCL]

Therefore solution is 10^-2 or 0.01M in HCL.


Related Questions

2. How does an atom become an Ion

Answers

Answer: An atom becomes an Ion if it gains one or more electron(s) or if it loses one or more electron(s).

5.6 g of an organic compound on burning with excess
of oxygen gave 17.6 g of CO2, and 7.2 g of H,O. The
organic compound is :​

Answers

Answer:organic compound is :​ C₄H₈

Explanation: The equation of the reaction of the organic compound burning with excess oxygen gives us the general equation as

C xHy  + 1/2(x+ y/2 )O₂ → xCO₂ + y/2H₂O

We first find the number of moles of CO₂ and H₂O

Number of moles of CO₂= Mass/ molar mass

= 17.6g/ 44g/mol ( 12+ 16 x2)

=0.4 moles

Number of moles of H₂O= Mass/ molar mass

= 7.2g/ 18g/mol ( 1 X 2+ 16)

=0.4 moles

From the reaction , we can see that  

x = 0.4

and  [tex]\frac{y}{2}[/tex]= 0.4  such that y= 0.4 x 2= 0.8

Their ratios become

[tex]\frac{x}{y}[/tex] =[tex]\frac{0.4}{0.8}[/tex]= [tex]\frac{4}{8}[/tex]

Therefor the organic compound CxHy  = C₄H₈

​  

 

Answer please I need help

Answers

Answer:

Explanation::::

The reaction for luminol is basically luminol and hydrogen peroxide. In the instructions for the preparation of the chemicals, I found that the hydrogen peroxide is 44 times more concentrated than the luminol. The fact that there are two reactants, should make you wonder if the reaction is second order overall. However, in class, we presented data that showed that the natural log of the amount of light change over time was a straight line with a negative slope. This would tend to make you think that the reaction is first order, given the information here, you can confidently say that this reaction is:
A. zeroth order
B. first order
C. pseudo first order
D. second order
E. third order

Answers

Answer:

pseudo first order

Explanation:

We know that for a first order reaction, the plot of the natural log of the amount of reactant against time is a straight line with a negative slope. In this case the amount of substance is monitored using the amount of light change. Hence, the plot of the natural log of the amount of light change against time was a straight line with a negative slope.

The statement above characterizes a first order reaction. However, we must remember that the reaction is bimolecular; it involves luminol and hydrogen peroxide. The hydrogen peroxide is 44 times more concentrated than the luminol making the reaction a pseudo first order reaction.

A Pseudo first-order reaction can be defined as a second-order or bimolecular reaction that is made to behave like a first-order reaction(Byjus).

SUMMARY: Write a 3-4 sentence summary about the Periodic Table.

Answers

Answer:

The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron setup, and repeating chemical properties. The structure of the table shows occasional (popular things/general ways things are going). The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with almost the same chemical behaviours. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks connected with the filling of different atomic orbitals.

Explanation:

i think that's what you're looking for...

When Aluminum oxide is heated with iron no reaction takes place?

Answers

Answer:

Explanation:

That's correct. Once Aluminum becomes an ion, it is very hard to force it to take back its electrons. Only a few elements can do it. Iron is not one of them.

What specifically causes the vaporization of the lower boiling liquid on the packing in a fractional distillation

Answers

Answer:

Fractional distillation works because the various liquids have different points of boiling. When heating the mixture: As they enter a column below their boiling point temperature, vapors condense. Fluid flows from the column

Explanation:

Compare land cover and land use, explaining how they are related and describing one way that humans can affect that relationship.

Answers

Answer:

Land covers refer to all the manufactured structures and vegetation that covers the land it includes all vegetation including plants, shrubs, trees, and other man-made structures too.

On other hand, Land use is the term that explains the use of the land by the different human activities that are occurred on land that are directly related to the land.

Land cover influences land use by utilizing particular land such as parks, ponds, or other uses according to the land. and humans can cause changes in both when they urbanize the area or land.

Which two statements about composite materials is true?

A. They're made up of more than one substance

B. They have the same or similar properties as the materials used to make them

C. They're always made of metal

D. They're readily available in nature

help as fast as u can please​

Answers

A and D are correct

Convert Fahrenheit temperature
to Kelvin scales​

Answers

°C + 273.15 = K. The basic formula for converting Fahrenheit into Celsius is (°F − 32) × 5/9 = °C. To convert Fahrenheit degrees into Kelvins, (°F − 32) × 5/9 + 273.15 = K.

Answer:

K = (F – 32)5/9 + 273.15

Explanation:

You basically convert Fahrenheit to Celcius and then to Kelvin

Here's the entire formula:

K = (x °F – 32)5/9 + 273.15

How to make 0.01 Molar solution in 30 ml of water

Answers

Answer:

You see the concentration decreased ten fold, from 1 M to 0.1 M.

You can simply increase the volume by ten times.

For example

If you have 250 mL of 1 molar HCl, you can add distilled water upto 2500 mL. Now the concentration is 0.1 molar.

If you want to use the serial dilution method, you can use the C1V1=C2V2 equation.

C1 = starting concentration.

C2 = final concentration.

V is for volume.

So let's say you have 500 mL of 1 M HCl and you only want 50 mL of 0.1 M HCl.

1 M x V1 = 0.1 M x 50 mL

V1 = 5 mL

So you take 5 mL of the original (stock) solution and dilute it up to 50 mL. Then you have 50 mL of 0.1 M HCl.

Explanation:

Is this the correct formula for magnesium acetate? Mg(C2H3O)2

Answers

Answer:

no

Explanation:

magnesium acetate= Mg(C2H3O2)2

Arrange the liquids pentane (CH3CH2CH2CH2CH3), pentanol (CH3CH2CH2CH2CH2OH), and pentanal (CH3CH2CH2CH2CHO) in order of decreasing viscosity, surface tension, and boiling point.

Rank from highest to lowest viscosity, surface tension, and boiling point.

Answers

Answer:

Following are decreasing order to this question:

Explanation:

Viscosity and surface tension both are inter-molecular by nature (IMFs)

The pentane becomes non-polar and just not H-bondable, so LDF alone would be likely (London Dispersion Force)

Pentanal, but H-bond => is impossible (Dipole-Dipole)

Pentanol is also an OH group, so H-bond => is probable (Hydrogen Bonding)

Higher air tension and viscosity than higher IMFs (because the atoms of fluids are more drawn). To lower the IMF (and therefore the viscosity/surface stress decreases)

pentanol

pentanal

pentane

Choose the more metallic element from each pair.
a . Sr or Sb,
b. As or Bi,
c. Cl or O,
d. S or As

Answers

Answer:

c

Explanation:

CI or O

Carla Vista Company has the following information available for September 2020.

Unit selling price of video game consoles $410

Unit variable costs $328

Total fixed costs $36,900

Units sold 600

Compute the unit contribution margin.

Unit contribution margin enter the unit contribution margin

Prepare a CVP income statement that shows both total and per unit amounts.

Compute Carla Vista’ break-even point in units.

Break-even point in units enter Break-even point in units units

Prepare a CVP income statement for the break-even point that shows both total and per unit amounts.

The more metallic element  pair is Cl or O. Therefore, option C is correct.

What is metallic element ?

Except for hydrogen, which is a nonmetal, the elements are arranged in a triangle with the metals to the left, the nonmetals to the right, and the metalloids to the immediate right of the triangle.

Metal atoms are bound together by metallic bonds to form solids known as metallic solids. Metal solids include things like copper, gold, and zinc, for instance. Since cesium is the last naturally occurring alkali metal, it has the most metallic characteristics.

The non-metal components, like as rock and rubbish, are subsequently removed from the ore during processing. The subsequent melting and combining of various metal components yields metal alloys. A solid metal alloy substance is produced when the freshly combined metal compound has cooled.

Thus, option C is correct.

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Which substance is one that cannot be separated or broken down into simpler substances by chemical means? (Element, pure)

table salt (NaCl)
gold wire (Au)
candle wax (CH2O)
water vapor (H2O)

Answers

Answer:

gold wire (Au)

Explanation:

A substance that cannot be separated or broken down into simpler substances by chemical means is an element.

Between the given options only gold wire is an element, Au.

A way of knowing that it is an element is noticing that its formula is a single symbol which corresponds to an element found in the periodic table, unlike a combination of said symbols (like NaCl or H₂O).


How many
neutrons would
be found in
carbon-15 if it
were to exist?
Show your work.

Answers

Answer:

8 neutrons

A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons. Therefore, there must be 8 neutrons in the nucleus to add up to 15. Table 3.

Element Symbol Number of Neutrons

carbon 146C 8

nitrogen 147N 7

157N 8

oxygen 168O 8

Explanation:

What is the correct name for Cr2O3?

A. Chromium trioxide
B. Chromium(III) oxide
C. Dichromium trioxide
D. Chromium(II) trioxide ​

Answers

B is correct
Hope that helped
The answer would be B! I hope this helps!

What element does Ca-37 turn into when it gives off radiation?
K-37
K-39
Sc-37
Sc-45

Answers

Ca-37 decays by positron emission (beta plus decay) to form K-37.

In this type of decay, a proton is converted into a neutron, giving off a positron (an antielectron) in the process. In essence, the atomic number of the element is reduced by one. The element with the atomic number of Ca minus one is potassium (K); the mass number remains unchanged (37) since it is the sum of the protons and neutrons in the nucleus, which is the same before and after decay (a proton became a neutron, and the positron isn’t a nucleon).

MQ : Which parts of the brain had most likely been affected?

Answers

Answer:

the cerebrum

Explanation:

answer is A

What is the volume of 0.05 mol of neon gas at 1.45 atm and 275K?

Answers

Answer:

sdasdasddsafsadsfds

Explanation:

There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percentages of each isotope to scale their contribution to the total mass. Each isotope's contribution is the percentage (in decimal form) multiplied by the mass of the isotope. What is the contribution (in amu) to the weighted average from the X-19 isotope, which has a mass of 19.00 amu

Answers

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

How many molecules are there in 10.5 grams of iron (111) sulfate trihydrate? With work shown

Answers

Fe2(SO4)3.3H2O = 56*2 + 3*(32+16*4)+3*(1*2+16) = 454 g/mol
Mol =m/M = 10.5/454 = 0.023 mol
Can u mark it brainliest ?

If each water molecule contains 2 hydrogen atoms, how many total oxygen atoms in 20 water molecules?
10
20
40
60​

Answers

the answer is 10 because if their is 20 molecules of hydrogen then their is one oxygen molecule for each which results in 20 divided by two which equals 10

What type is hydropower?

Answers

Answer:

Hydroelectric energy, also called hydroelectricity or hydropower, is a form of energy that uses the power of flowing water to generate electricity. There are three main types of hydroelectric energy: impoundment, diversion, and pumped storage.

Explanation:

Bond energies can be used to estimate the energy of a reaction. Why is this only an estimate?

A) It's difficult to measure such a smal amount of energy.

B) The bonds in all molecules are the same, but not all molecules have bonds that are easily measured.

C)The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.

D) It's difficult to isolate an individual bond.​

Answers

Answer:

C)The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.

Explanation:

This is true going by the the statement about the bond energies and the bonding being different among the various elements. In the example given which is between ethanol and water, the bonds which exist among the elements is stronger in water than in ethanol. That is why, ethanol is easily combustible than water.

Answer:

The same bond in a different molecule has a different energy. For example, O-H in water versus ethanol has different energies.

Explanation:

_______________ is the interaction between organisms in an ecosystem.​

Answers

Mutualism, commensalism, competition, and predation. I’m not sure if those are correct sorry.

Mass of hydrated copper sulfate in CuSo4.5H2O​

Answers

Answer: Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.

Explanation:

Molar mass is the mass of 1 mole of the molecule. It is calculated by adding masses of all the atoms in the given molecule.

[tex]CuSO_4.5H_2O[/tex] contains one atom of copper , 1 atom of sulphur, 9 atoms of oxygen and 10 atoms of hydrogen

Mass of copper = 63.5  g/mol

Mass of sulphur =  32.06 g/mol

mass of oxygen = 16.00 g/mol

Mass of hydrogen = 1.008 g/mol

 Thus mass of [tex]CuSO_4.5H_2O[/tex] = 63.5(1)+32.06(1)+16.00(9)+1.008(10)=249.68 g

Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.

Match one graph shown at right to each of the gas laws named below.
Charles's law: a, c, d, e (b is incorrect)
Gay-Lussac’s law: a, b, d, e (c is incorrect)
Boyle’s law: b, c, d, e (a is incorrect)

Answers

Answer:

DBE

Explanation:

Cause I got it right

The correct options for Charles's law, Gay-Lussac's Law and Boyle's law are D, B and E respectively.

Charles's law states that, under the assumption of constant pressure, the volume of a gas increases or decreases with its temperature. As the temperature increases, the gas molecules move more quickly and occupy more space, increasing the volume of the gas.

Gay-Lussac's law states that, assuming a constant volume, the pressure and temperature of a gas are exactly related. Increasing temperature causes the gas molecules to become more kinetically energetic and collide with the walls of the container more frequently, increasing the pressure.

Boyle's law states that at a given temperature, the pressure and volume of a gas are inversely proportional. The reduced volume forces the gas molecules into a smaller area, increasing the chance of collisions with the container walls and pressure.

Therefore, the correct options for Charles's law, Gay-Lussac's Law and Boyle's law are D, B and E respectively.

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Define atmosphere and list any three ways in which
the atmosphere is useful for the survival of living
things.​

Answers

Answer:

Explanation:

Atmosphere - the envolpoe of gasses sourounding the earth or another planet or the air in any particular place. The atmosphere protects us from the suns harmful rays, carrys cloud full of water so it can rain all over the world, and have oxygen, which is nessecary for survival to all living things.

The foam football Coach Johnson left in his chair will stay there until he
moves it to sit in the chair.


A. Newton’s first law
B. Newton’s second law
C. Newton’s third law

Answers

Answer:

B. Newton’s second law

Explanation:

correct me if im wrong

Answer:

Its c newton third law

Explanation:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

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