What is the [H3O+] if the [OH-] is 1 x 10 -11 ?

The long form of periodic table consist of vertical columns called groups and horizontal rows called periods.

Elements are arranged in the increasing order of atomic numbers.

Elements in the modern periodic table are arranged in 7 periods and 18 groups.

Horizontal rows are called periods and vertical columns are called groups.

Elements are placed in periods based on the number of shells in their atoms.

The shortest period is the first period which contains only two elements – Hydrogen and Helium.

Sixth period is considered as the longest periods in the periodic table. It contains elements from Cesium to Radon.

Seventh period is incomplete period.

In periodic table Lanthanides and Actinides are shown in the bottom of the periodic table

Answer:

The amount of H2SO4 in 2 litres is 560gm.

Explanation:

Given,

mass of sulphuric acid / volume of solution =28%

Therefore, mass of sulphuric acid in 100 ml solution is 28 grams.

We know that,

volume of solution is 2000ml.

Thus,

mass of sulphuric acid in 2000ml is

(28/100) ×2000

=28×20

=560gm

Thus, the mass of sulphuric acid is 560gm.

The true statements are;

Now we can see that the reaction here is a redox reaction. Thus;

Eocell = cell potential = 0.54 - (-0.41) = 0.95 V

K = equilibrium constant = ?

n = number of moles of electrons = 2

ΔG = change in free energy = ?

Hence;

Eocell = 0.0592/n log K

0.95 = 0.0592/2 log K

K = 0.95 * 2/0.0592

K = 1.2 * 10^32

Now

ΔG = -nFEcell

ΔG = - (2 * 96500 *  0.95)

ΔG = -183.3kJ

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Potassium (K) has the greater tendency to be oxidized when compared to Lithium (Li).

Oxidation is a chemical process triggered by the reaction between an compound and an oxidizing agent. The agent is what gains electrons and undergoes reduction, causing what is called oxidation.

With that being said, as you go down the alkali metal group, the ionisation energy decreases. The tendency of an atom to give its electron (or get oxidised) increases. Therefore, potassium oxidises more easily than lithium or in other words, potassium has a lesser tendency to get reduced compared to lithium.

As lithium has a higher tendency to get reduced than potassium, lithium gets deposited instead of potassium.

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Answer:

0.15 M KCl

Explanation:

(Step 1)

Convert the original volume from mL to L. Calculate the moles of the original solution.

75.0 mL / 1,000 = 0.0750 L

Molarity = moles / volume (L)

0.200 M = moles / 0.0750 L

0.0150 = moles

(Step 2)

Convert the final volume from mL to L. Calculate the final molarity.

100. mL / 1,000 = 0.100 L

Molarity = moles / volume (L)

Molarity = 0.0150 moles / 0.100 L

Molarity = 0.15 M

Answer:

48 g C

Explanation:

To find the grams, you need to (1) convert atoms to moles (using Avogadro's Number) and then (2) convert moles to grams (using atomic mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the sig figs of the given value.

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

Atomic Mass (C): 12.011 g/mol

2.4 x 10²⁴ atoms C                   1 mole                       12.011 g
-----------------------------  x  --------------------------------  x  ---------------  =  48 g C
                                         6.022 x 10²³ atoms           1 mole

Answer: The answer is B fractional distillation.

Explanation:

Individual components of a mixture can be separated out by a number of methods. These are:

gravity separation: If the various components of the mixture have different gravity, they will form different layers (when shaken and allowed to settle). This way they can be separated out.

Filtration: Particles of different

Taking into account the definition of calorimetry and latent heat, the heat needed to melt 100.0 grams of ice that is already at 0°C is 33,400 J (option A).

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

In this case, the heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

In this case, you have to melt the ice into liquid water.Being the specific heat of melting of ice is 334 J/g, the heat needed to melt 100 grams of ice is calculated as:

Q= 100 grams× 334 J/g

Solving:

Q= 33,400 J

In summary, the heat needed to melt 100.0 grams of ice that is already at 0°C is 33,400 J (option A).

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Answer:

Covalent bonds are intramolecular bonds whereas hydrogen bonds are intermolecular bonds.

hope this helps and good luck :)

The product of the given reaction and the balanced form is as follows: Cu3(PO4)2 + 2Fe(OH)3 → 2FePO4 + 3Cu(OH)2 (option C).

A chemical reaction involves the formation of products from the combination of two or more reactants.

However, for the reaction to be balanced, the number of moles of each element on both sides of the equation must be equal.

According to this question, the following reaction is given: Cu3(PO4)2 + Fe(OH)3 → ?

The product of the given reaction and the balanced form is as follows: Cu3(PO4)2 + 2Fe(OH)3 → 2FePO4 + 3Cu(OH)2.

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Answer:

c

Explanation:

total production of the three shifts/ total of prediction of each yield x 100%

Answer:

C.) 74.25%

Explanation:

I got it correct on founders edtell

Answer:

46 359 J

Explanation:

You need heat of fusion of water:   334 J/g

 and specific heat of ice : 2.093 j/g-C

120 * 334    = 40 080 J to make ice

+   120 * 2.093 * 25  = 6279 J   to chill the ice to -25 C

Total = = 46359 J

Answer:

See below

Explanation:

2 Ag +   Cu(NO3)2 = Cu +  2 AgNO3​

Conifers are non flowering plants that possess special cones to carry out reproduction. When conifers reproduce using these special structures, it is a form of Sexual reproduction.

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Answer:

D. Convert the 0.2 kg of NaCl to moles of NaCl

Explanation:

The molality equation looks like this:

Molality = moles of solute / mass (kg) of solvent

In this case, the solute is NaCl and the solution is water. So, if you have been given NaCl in kg, you need to convert it to grams and then to moles in order to plug it into the equation.

The area of the periodic table that has the most elements included within it is metals (option A).

Periodic table of elements is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table encompasses chemical elements arranged horizontally and vertically. The periodic table is made up of groups and periods.

However, most of the elements on the periodic table are metals because virtually 93 elements are metals.

Therefore, the area of the periodic table that has the most elements included within it is metals.

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Answer:

See the image below for he circled and labeled functional groups.

*Keep in mind that all of the molecules technically contain alkanes.

Answer: e

Explanation: ima be real i searched it up lol

a) physical property

b) chemical change

c) chemical change

d) chemical property

e) physical change

f) physical property

g) physical change

h) physical change

a) Ethanol has a density of 0.697 g/mL shows physical property, b) The solution turns blue upon mixing water and food coloring shows chemical change, c) Wood burns in an oven shows chemical change, d) Methyl alcohol is highly flammable shows chemical property, e) Ice melts in a beaker shows physical change, f) Methyl ethanoate smells like apples shows physical property, g) A car crashes into a wall shows physical change and h) Sugar dissolves in water shows physical change.

A physical change is a transition that modifies a substance's physical characteristics without changing its chemical makeup or identity. The substance's molecules don't change during a physical change; only their arrangement or state does. On the other hand, a chemical change entails the creation of new compounds with chemical properties that differ from the original ones. A entirely new substance is produced as a result of a chemical reaction in which the links between atoms or molecules are broken and new bonds are established.

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Answer:

1st = saturated

Explanation:

Bro first ka answer saturated he

At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas.

In a state of pressure and temperature of a given triple point, all three phases (known to be the solid, liquid and gas state) are seen to often exist in equilibrium.

Note that the triple point is said to be one that stands for  the lowest pressure in which a liquid phase can live in equilibrium with that of the solid or vapor.

Hence, the statement of At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas is true.

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Answer:

C

Explanation:

For every action there is an equal but opposite reaction..... the forces are the same

The correct IUPAC name of the following structure CH3-CH2-CH=CH2 is But - 1 - ene

Hence the structure CH3-CH2-CH=CH2 is named on the basis of the above rule as but - 1 - ene.

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The likely thing which will occur when an atom of this element 1s²2s²2p6 3s¹ comes near an atom having seven valence electrons is what is referred to as electrovalent bonding.

This is also referred to as ionic bonding and involves the transfer of atoms from one element to another. This is done so as to ensure that an octet configuration is achieved.

The element 1s²2s²2p6 3s¹  is Sodium and will undergo ionic bonding with the chlorine. One valence electron is transferred from the sodium to the chlorine which makes them stable.

This is therefore the reason why electrovalent bonding will most likely between the two elements.

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The pH can be defined as the negative logarithm of the hydrogen ion concentration of the solution.

What we call the pH can be defined as the negative logarithm of the hydrogen ion concentration of the solution. We are aware that we can use the relation [H+]  [OH-]  = 1 * 10^-14 to handle the enormity of this problem.

Now, let us go about solving the problems;

1. pH = -log(1 x 10-7) = 7

2.  [H+]=  1 * 10^-14/ 1 x 10^-3

pH =  -log(  1 * 10^-11)

pH = 11

3. pH = -log( 1 x 10^-2)

pH = 2

4. pH = -log(  1 x 10^-10)

pH = 10

5.  [H+]=  1 * 10^-14/ 1 x 10^-8

[H+]=  1 * 10^-6

pH = 6

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The average kinetic energy of the gas particles is greater in container B because it has a higher temperature.

The term temperature refers to a measure of the average kinetic energy of the molecules of  body. This means that molecules that are at high temperature tend to move faster than the molecules that are at low temperature.

As such, the higher temperature of the molecules of the gas in B shows that the molecules in B are faster than those in A thus the correct statement is; "the average kinetic energy of the gas particles is greater in container B because it has a higher temperature."

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Missing parts;

The picture shows two containers filled with a gas.

Two equally sized containers are shown with tight lids and each container has a thermometer. The container on the le is labeled A and the one on the right is labeled B. The thermometer inside container B shows a higher temperature than the thermometer inside container A.

Which statement is correct?

The average kinetic energy of the gas particles is greater in container A because it has a lower temperature.

The average kinetic energy of the gas particles is greater in container B because it has a higher temperature.

The gas particles in both containers have the same average kinetic energy because t have the same volume.

The gas particles in both containers have the same average kinetic energy because t have equal number of particles.

The Molar enthalpy of combustion of methanol obtained from the practical is -31.02 kJ/mol.

The molar enthalpy of combustion from bond energies, ΔH is -543 kJ/mol

The differences in the values could be due to:

The actual enthalpy of combustion of methanol is calculated from the data obtained from the laboratory work.

The enthalpy of combustion is equal to the heat energy given off from the combustion of methanol.

Quantity of heat gained by water , q = -mcθ

where:

mass of water heated = 100 g

specific heat capacity of water = 4.18 J/g/°C

temperature change = 32.4°C - 21.5°C = 10.9°C

q = -(100 * 4.18 * 10.9) J

q = - 4556.2 J

moles of methanol reacted = mass/molar mass

mass of methanol = 80.6 - 75.9 = 4.7 g

molar mass of methanol = 32 g/mol

moles of methanol = 4.7/32 = 0.14687 moles

Molar enthalpy of combustion of methanol = -4556.2 J/0.14687 mole

Molar enthalpy of combustion of methanol = -31.02 kJ/mol

Calculating molar enthalpy of combustion from bond energies:

Sum of bond energies of bonds broken = (3 * 412) + 358 + 463 + (1.5 * 496) + 35 = 2836 kJ/mol

Sum of bond energies of bonds formed = (2 * 743) + 2(2 * 463) + 41 = 3379 kJ/mol

ΔH = 2836 kJ/mol - 3379 kJ/mol

ΔH = -543 kJ/mol

The value obtained from the practical is less than that from the bond energies

b. The possible reasons for the difference in value obtained from the practical is less than that from the bond energies include:

In conclusion, the molar enthalpy of combustion of methanol is negative since heat is given off during the reaction.

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The balanced redox reaction equation is 2Fe^2+  (aq) + H2O2 (aq)+2H + (aq) → 2Fe^3+ (aq)+2e + 2H2O(l).

A redox reaction equation is one in which there is a loss or gain of electrons. We can see that the oxidation number of some species is increased while the oxidation number of some species is reduced.

The oxidation half equation is written as; 2Fe^2+  (aq)→2Fe^3+ (aq)+2e

The reduction half equation is written as; H2O2 (aq)+2H + (aq)+2e  →2H2O(l).

Thus, the overall balanced redox reaction equation is written as;

2Fe^2+  (aq) + H2O2 (aq)+2H + (aq) → 2Fe^3+ (aq)+2e + 2H2O(l).

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Answer:

C.) Fluorine

Explanation:

A period describes a row on the periodic table.

Halogens are located in the 17th column on the periodic table.

As such, the element located in the second row in the 17th column is fluorine.