a 50 g sample of impure kclo3 solubility - 7.1 g per 100 g h2o at 20 degree c is contaminated with 10 percent of kcl solubility - 25.5 g per 100 g of h2o at 20 degree c. calculate the minimum quantity of 20 degree c water needed to dissolve all the kcl from the sample. how much kclo3 will be left after this treatment? assume that the solubilities are unaffected by the presence of the other compound.

Answer:

The agricultural revolution increased agricultural production and technological advancements. I think this led to population growth because the increase in labor and the increase in technologies increased human deveolpment. The revolution also allowed farmers to grow and produce more food and transport it to where it was needed.

Explanation:

In H₂SO₄, the oxidation number of H is +1, the oxidation number of S is +6, and the oxidation number of O is -2.

The charge an atom would have if the compound were made up of ions is known as its oxidation number. 1. In a neutral substance with atoms of only one element, the oxidation number of an atom is zero.

The oxidation state, often known as the oxidation number, in chemistry is the hypothetical charge that an atom would have if all of its links with other atoms were entirely ionic.

In sulfuric acid, the oxidation number of H is +1, the oxidation number of S is +6, and the oxidation number of O is -2.

Learn more about oxidation number, here:

https://brainly.com/question/29100691

#SPJ1

The reaction HNO₃ + F⁻ ⇆ NO₃⁻ + HF is an equilibrium reaction.

Reaction equilibrium is a condition where the components of the reactants and reaction products remain in the system, in a state of equilibrium the rate of the reaction to the right is equal to the rate of the reaction to the left.

In general, Bronsted-Lowry defines acids and bases as follows.

                       HNO₃ (aq) + F⁻ (aq) ⇆ NO₃⁻  (aq) + HF (aq)

Proton handover in the above reaction is:

In the above reaction, F⁻ gives 1 proton (H⁻) to NO₃⁻. So, NO₃⁻is the base, while HF is the acid.

The reaction between HNO₃ and F forms two acid-base conjugates, namely the HNO₃/F⁻ conjugation pair and the NO₃⁻/HF conjugation pair.

So, this reaction is balanced.

Learn more about reaction equilibrium at https://brainly.com/question/23121462

#SPJ4

A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

Hope I helped :)

The rate of disappearance of Br- is 5 times  of the rate of disappearance of BrO₃⁻. Hence, the disappearance rate of Br- in the reaction is 0.201 M/s .

The rate of a reaction is the rate of disappearance of the reactants or the rate of appearance of the products. The rate of a reaction is directly proportional to the molar concentration of the reactants.

For the given reaction, the rate of reaction can be written in the following terms.

-d/dt [BrO₃⁻] = -1/5 d/dt [Br-] =  -1/6d/dt [H+ ] = +1/3d/dt  [Br²] = + 1/3 d/dt[H₂O]

The minus sign indicates the disappearance and + indicates the formation.

Given, the rate of disappearance of BrO₃⁻ = -d/dt [BrO₃⁻]  = 0.041 M/s.

-d/dt [BrO₃⁻]  = 1/5 d/dt [Br-]

then  d/dt [Br-] = 5 -d/dt [BrO₃⁻]  = 5 × 0.041 M/s = 0.201 M/s.

Therefore, the rate of disappearance of Br- in this reaction is 0.201 M/s.

Find more on reaction rate :

https://brainly.com/question/29261432

#SPJ9

Answer:

³²P = 48.688%

³⁰P = 51.312%

Explanation:

The average mass is defined as the sum of each mass atom times its abundance. For the phosphorus with 2 isotopes with mass 30 and 32 uma, the average mass is defined as:

Average mass: Mass ³²P * Abundance + Mass ³⁰P * Abundance

30.97376 = 32 * X + 30 * Y (1)

Where X is abundance of ³²P and Y abundance of ³⁰P

Also, the sum of both abundance is 100% = 1:

1 = X + Y (2)

Replacing (2) in (1):

30.97376 = 32X + 30Y

30.97376 = 32X + 30(1-X)

30.97376 = 32X + 30-30X

30.97376 = 2X +  30

0.97376 = 2X

0.48688 = X

The percentage of ³²P is 0.48688*100 = 48.688%

And ³⁰P is 100 - 48.688 = 51.312%

In 1 mole of calcium carbonate, there are approximately 18.066 x 10^23 moles of oxygen.

To determine the number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3), we need to examine the chemical formula of calcium carbonate and identify the number of oxygen atoms present.

The chemical formula of calcium carbonate is CaCO3. In this formula, we have one calcium atom (Ca), one carbon atom (C), and three oxygen atoms (O).

The subscript numbers in the formula indicate the number of atoms for each element. Therefore, we have:

1 calcium atom (Ca)

1 carbon atom (C)

3 oxygen atoms (O)

To calculate the number of moles of oxygen in 1 mole of calcium carbonate, we multiply the number of oxygen atoms (3) by the Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) = 3 moles of oxygen x (6.022 x 10^23 molecules/mol)

Calculating this value, we find:

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) ≈ 18.066 x 10^23 moles of oxygen

for more such questions on calcium

https://brainly.com/question/12216405

#SPJ8

The volume of the sodium hydroxide solution required is 4.9 * 10^-5 L.

We know that the reaction between the sodium hydroxide in aqueous solution and para-nitrophenol is a 1:1 reaction. We now have to find the volume of the sodium hydroxide solution that must be added to the solution in order to ensure that formation of the yellow anion is complete.

We should know that the reaction is equimolar so we can write that;

0.105 M * V =  7.20 × 10−4 g/ 139 g/mol

V = 7.20 × 10−4 g/ 139 g/mol/0.105 M

V = 4.9 * 10^-5 L

Learn more about reaction:https://brainly.com/question/17434463

#SPJ1

1) Write the chemical equation.

2) List the known and unknown quantities.

Sample: PbS

Mass: 393. g.

Sample: PbO.

Mass: 593. g.

Pb produced: unknown.

3) Convert masses to moles

3.1-Convert mass of PbS to moles of PbS.

The molar mass of PbS is 239.2650 g/mol.

We have 1.64 mol PbS

3.2-Convert mass of PbO to moles of PbO.

The molar mass of PbO is 223.1994 g/mol.

We have 2.66 mol PbO.

4) Limiting reactant

4.1-How many moles of PbO do we need to use all of the PbS?

The molar ratio between PbO and PbS is 2 mol PbO: 1 mol PbS.

We need 3.28 mol PbO and we have 2.66 mol PbO. We do not have enough PbO. This is the limiting reactant.

4.2-How many moles of PbS do we need to use all of the PbO?

The molar ratio between PbO and PbS is 2 mol PbO: 1 mol PbS.

We need 1.33 mol PbS and we have 1.64 mol PbS. We have enough PbS. This is the excess reactant.

5) Moles of Pb produced in the reaction from the limiting reactant.

Limiting reactant: We have 2.66 mol PbO.

The molar ratio between PbO and Pb is 2 mol PbO: 3 mol Pb.

6) Convert moles of Pb to mass of Pb.

The molar mass of Pb is 207.2000 g/mol.

The mass of Pb produced is 827. g Pb.

.

1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

Learn more about hydrocarbon:https://brainly.com/question/31643106

#SPJ1

Answer: you can't really balance it doesn't make anything

Explanation:

Answer:

I think it is C

Explanation:

I hope this helps

Answer:

The third option

Explanation:

Heat is considered a form of energy existing as the result of the random motion of molecules and is the form of energy that is transferred between bodies as a result of their temperature difference

The kinetic energy is the energy of an object in motion.

Kinetic energy is a form of energy that an object possesses due to its motion. It is defined as the energy that an object has as a result of its mass and velocity.

We know that;

KE = 1/2mv^2

PE = mgh

1) KE = 0.5 * 2300 * (32)^2

= 1177600 J

2) PE = 31 * 2.2 * 9.8

= 52.6 J

3) PE = mgh

h = PE/mg

h = 65000/525 * 9.8

h = 12.6 m

4) KE = 1/2mv2

m = 2KE/v^2

m = 2 * 370/(6.5)^2

m = 17.5 Kg

5) KE = 0.5 * 75000 * (11500)^2

KE = 4.96 * 10^12 J

Learn more about KE:https://brainly.com/question/13662622

#SPJ1

Answer:

1. Litres

2. minutes

3. Kelvin (K)

4. Kilometer/hour

5. hours

6. Litre

7. metre

8. metre

9. Litres

10. milliliters

Explanation:

1. Coca-Cola is a liquid substance, hence, its volume must be measured in LITRES.

2. This question is related to time I.e. being early, hence, the unit of measurement is MINUTES.

3. The unit of temperature is Kelvin (K). Therefore, water boils at 373K

4. This question is related to speed, whose unit of measurement is kilometer/hour (km/hr).

5. A movie runs with time, which is measured in HOURS.

6. Mineral water is a liquid, which can only be bought per volume. Hence, the appropriate unit is LITRE.

7. Height is measured in metres (m). Therefore, one can say that " the height of your younger brother is 10metres"

8. The length of a substance is also measured in metres.

9. Volume is measured in LITRES

10. Cough syrup is a drug whose volume is quantified by millilitres i.e. a thousandth litre

Explanation:

To calculate the heat gained by nickel, we can use the formula:

q = m * c * ΔT

where q is the heat gained, m is the mass of the nickel, c is the specific heat of nickel, and ΔT is the change in temperature.

Given:

- Mass of nickel, m = 31.4 g

- Specific heat of nickel, c = 0.443 J/g · °C

- Change in temperature, ΔT = 64.2 °C - 27.2 °C = 37.0 °C

Substituting the values into the formula, we get:

q = (31.4 g) * (0.443 J/g · °C) * (37.0 °C)

Simplifying the calculation, we get:

q = 584 J

Therefore, the heat gained by nickel when 31.4 g of nickel is warmed from 27.2 °C to 64.2 °C is 584 J.

Answer:

see the image below

Explanation:

oxidation is losing of electrons

reduction is gaining of electrons

Answer:

A straight-chain alkane that has five carbon atoms, also known as pentane, differs from a cycloalkane that has five carbon atoms, also known as cyclopentane, in terms of their molecular structure and properties. Pentane has a linear, straight-chain structure, while cyclopentane has a ring-shaped structure. This difference in structure affects their physical and chemical properties. For example, pentane has a higher boiling point and lower melting point than cyclopentane due to the differences in the strength of the intermolecular forces between their molecules

Explanation:

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

For such more question on polymerization

https://brainly.com/question/1602388

#SPJ8

Answer:

Xenon is less reactive.

Explanation:

Xenon is a noble gas with 8 valence electrons whereas bromine is a halogen with 7 and is very reactive.

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore,  xenon (xe) is less reactive than bromine (br) as xenon has noble gas electronic configuration.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

Xenon (xe) is a 18 group element of a periodic table. The electronic configuration of these are of noble gas. Noble gases are very unreactive. These can't react at even harsh condition. Bromine belongs to group 17 of parodic table that is to halogen family. Halogens have high electronegativity. these are very reactive. the ere one electron less than the noble gas electronic configuration.

Therefore,  xenon (xe) is less reactive than bromine (br) as xenon has noble gas electronic configuration.

To know more about element, here:

brainly.com/question/8460633

#SPJ5

Answer:

45.0

Explanation:

Using the rules of rounding, we can round 44.981 to 45. We need that third sig fig though, so we add the trailing zero

The value 44.981 g to three significant figures is 45.0 g.

Significant figures, also known as significant digits, are the digits in a number that carries meaning in terms of precision and accuracy. They indicate the certainty or reliability of a measurement or calculated value.

To round the value 44.981 g to three significant figures, follow the rules for significant figures:

Identify the three most significant digits in the number. They are 4, 4, and 9.

Look at the digit immediately after the third significant digit. If it is 5 or greater, round up; if it is less than 5, round down.

In 44.981 g, the digit immediately after the third significant digit (9) is 8. Since 8 is greater than 5, round up.

Therefore, rounding 44.981 g to three significant figures gives us:

45.0 g.

To learn more about significant figures, follow the link:

https://brainly.com/question/23396760

#SPJ6

Answer:

17 protons, 20 neutrons, and 17 electrons​.

Explanation:

A periodic table can be defined as the standard arrangement of chemical elements by atomic number, electronic configuration and chemical properties in a tabular form.

Generally, a proper representation of the mass number and atomic number of chemical elements is key and very important in chemistry.

Furthermore, as a rule, it should be noted that the mass number (nucleon number) is always larger than the atomic number(number of proton).

The mass number of this neutral atom of Cl-37 is 37 and we know that the atomic number (number of protons) of chlorine is 17. Also, the atomic number of an element is equal to the number of its electrons.

A neutral atom of Cl-37 has 17 protons, 20 neutrons, and 17 electrons.

Hence, a neutral atom of Cl-37 can be identified based on its number of protons because it represent its atomic number, which is what is used to differentiate an atom of an element from the atom of another chemical element.

A

because both have 2's in front of them

The ranking of acids from weakest to strongest would be: (A) HIO₂ < HBrO₂ < HFO₂ < HClO₂, (B) HIO = HIO₂ < HIO₃ = HIO₄, and (C) HF < HCl < HBr < HI.

Ranking the given acids from weakest to strongest would be done by analyzing their acidity constants. The higher the acidity constant, the stronger the acid.

a. HFO₂, HClO₂, HBrO₂, HIO₂
The acidity constants for the given acids are:
HFO₂ = 2.2 x 10⁻⁷
HClO₂ = 1.1 x 10⁻²
HBrO₂ = 2.3 x 10⁻⁹
HIO₂ = 2.3 x 10⁻¹¹

Therefore, the ranking of these acids from weakest to strongest would be:
HIO₂ < HBrO₂ < HFO₂ < HClO₂

b. HIO, HIO₂, HIO₃, HIO₄
The acidity constants for the given acids are:
HIO = 2.3 x 10⁻¹¹
HIO₂ = 2.3 x 10⁻¹¹
HIO₃ = 1.6 x 10⁻¹
HIO₄ = 1.6 x 10⁻¹

Therefore, the ranking of these acids from weakest to strongest would be:
HIO = HIO₂ < HIO₃ = HIO₄

c. HF, HCl, HBr, HI
The acidity constants for the given acids are:
HF = 7.2 x 10⁻⁴
HCl = 1.0 x 10⁶
HBr = 1.0 x 10⁹
HI = 1.0 x 10¹⁰

Therefore, the ranking of these acids from weakest to strongest would be:
HF < HCl < HBr < HI

In conclusion, the ranking of the given acids from weakest to strongest are:
a. HIO₂ < HBrO₂ < HFO₂ < HClO₂
b. HIO = HIO₂ < HIO₃ = HIO₄
c. HF < HCl < HBr < HI

know more about acidity here

https://brainly.com/question/11543614#

#SPJ11

Lithium is the element because only lithium atom with 3 protons in this diagram.

An element is a pure substance that cannot be broken down into simpler substances through physical or chemical means.

Lithium is the symbol for the element. Because lithium has three protons, it has the atomic number 3. Because lithium atoms contain either 3 or 4 neutrons, it has an atomic mass of 6.94. On the periodic table, lithium is in group 1 and has one valence electron.

Thus, Lithium is the element because only lithium atom with 3 protons in this diagram.

To learn more about an element, follow the link;

https://brainly.com/question/13025901

SPJ1

Answer:

10.66  grams

Explanation:

1. The most electronegative element is O (a)

2. The element that exhibits Greatest number of oxidation states is N (e)

3. The Smallest ionic radius for its most common ion is found for Mg (d)

1. Electronegativity is tendency of an atom to attract shared pair of electrons. Across a period, it increases from left to right while in a group, it decreases as we move down. The most electronegative elements are found in the top right of the periodic table because of the increase in effective nuclear charges. Hence, O is most electronegative element.

2. Oxidation state is the total number of electrons that an atom can either gain or loss to form a chemical bond. N exhibits a wide range of oxidation states from -3 to +5 because of half filled p orbital which is more stable.

3. Ionic radius is the radius of a monatomic ion in an ionic crystal structure. \(Mg^{2+}\) has higher number of protons that will attract the negatively charged valence electrons to a greater extent hence shortening the distance.

Learn more about electrons here:

https://brainly.com/question/2845051

#SPJ1

Explanation:

the answer is in the image above

Answer:

When myocytes (aka muscle cells) are triggered at a certain point for awhile it can cause strain and pain throughout the muscle.