How are a mole and a dozen similar?

Answers

Answer 1

Mole and dozen are similar to each other because of the presence of number 12 in both measurements.

How are a mole and a dozen similar?

The sample of 12 grams of carbon is equal to its one mole and we know that in one dozen, there are 12 numbers. Therefore, we considered mole similar to a dozen.

So we can conclude that Mole and dozen are similar to each other because of the presence of number 12 in both measurements.

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Related Questions

Which of the following reactions depicts a synthesis reaction?

Answers

Answer:

C combination reaction (synthesis) reaction

Explanation:

two chemicals are combined

When 4 mol of glucose is fermented, a mass of 55.2 g of ethanol is produced. Show that the percentage yield of ethanol is 15%
(Mr of C2H5OH = 45)

Answers

Theoretical yield =0.15 g

% yield = 15%

reaction

C6H12O6 → 2C2H5OH + 2CO2

from above reaction, we get to know that,

1 mole of glucose → 2 mole ethanol

for 4 mole of glucose → 8 mole of ethanol

\frac{55.2}{8(46)} = yield of ethanol

yield of ethanol = 0.15g

% yield = (experimental/theoretical )*100

% yield of ethanol = 0.15 x 100 =15%

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identify the reaction type predict the products and the balance in each of the following equations a. ___K3PO4 + ___ MgCl2 --> b. ___Fe + ___Na2CO3 --> c. ___CH4 + ___O2 --> d. ___H2 + ___Cl2 -->

Answers

a. 2K₃PO₄ + 3MgCl₂ ----> Mg₃(PO₄)₂ + 6KCl

This is a double displacement reactionPotassium displaces Magnesium from magnesium chlorideMagnesium displaces potassium from potassium phosphate

b. Fe + Na₂CO₃ -----> FeCO₃ + 2Na

This is a redox reactionIron undergoes oxidation, iron is oxidised to ferrous carbonateSodium undergoes reduction, sodium is reduced from sodium carbonate to sodium metal

c. CH₄ + 2O₂ ------> CO₂ + 2H₂O

This is a combustion reactionMethane undergoes combustion in the presence of oxygen to produce carbon dioxide and water

d. H₂ + Cl₂ -------> 2HCl

This is a combination reactionHydrogen gas and chlorine gas combine to form Hydrogen chloride gas

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Which of the following reactions depicts a decompostion reaction?

Answers

Answer:

B it is decomposition reaction

Explanation:

In decomposition reaction compound is broken into two or other elements

An intravenous solution is noted as having a concentration of glucose equal to 0.312 M. What volume of solution (in mL) is needed to deliver 0.078 moles of glucose to the patient?

Answers

The volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

How to calculate volume?

The volume of a solution can be calculated by using the following formula:

Molarity = n/V

Where;

n = number of molesV = volume

According to this question, an intravenous solution is noted as having a concentration of glucose equal to 0.312 M. The volume that will be needed is as follows:

volume = 0.078 moles ÷ 0.312M

volume = 0.25L = 250mL

Therefore, the volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

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Read about Flexon below. What scientific name is given to this kind of alloy?

Flexon :
Flexon is the trademarked name for a special material that is used to make frames for spectacles. It is light and extremely flexible. If it is bent it will 'remember' its original shape and return to it.

Answers

IBUPROFEN-400MG + PARACETAMOL-325MG is the scientific name Flexon.

What does Flexon mean?

Flexon is the trademark for a shape memory alloy of titanium that is used to make eyeglass frames.

The metal alloy used by Flexon in their eyewear was actually destined for a very different path when, in 1961, US Naval Scientists creating a missile heat shield discovered that the alloy they were using automatically returned to its original shape, even after being hit by a hammer.

Flexon is the trademarked name for a special material that is used to make frames for spectacles. It is light and extremely flexible. If it is bent it will 'remember' its original shape and return to it.

Flexon eyeglasses are all made of memory metal titanium.

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What did people use for energy before fossil fuel and electrical power energy was harnessed?
They used whale oil and steam power to run machines.
Humans had only their own muscles and a knowledge of levers and pulleys for power.
Humans burned wood to power their machines.
Humans used muscle power and direct wind and water power.

Answers

Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

What is Fossil Fuel ?

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Hence, Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.

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Answer:

B is the answer.

Explanation:

sry if wrong :D

Samantha opened a tin of white paint. The paint consisted of a liquid and particles of titanium dioxide that are insoluble in the liquid.The paint had separated into two layers What type of substance in the titanium dioxide

Answers

Titanium dioxide is a type of mixture if particles of titanium dioxide are insoluble in the liquid.

What is a mixture?

A mixture is composed of one or more pure substances in varying compositions.

A mixture is a material made up of two or more components joined together, but not chemically combined. In a mixture, a chemical reaction does not occur and each of its components maintains its identity and chemical properties.

A compound is a substance formed by the chemical combination of two or more different elements from the periodic table. The elements of a compound cannot be divided or separated by physical processes. They are not mixtures or alloys

An element is a type of matter made up of atoms of the same class.  It is an atom with unique physical characteristics, a substance that cannot be decomposed by a chemical reaction.

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two different substance can have the same properties ​

Answers

Yes, you're absolutely correct

ls zinc qnd hydrogen chloride combining into sinc chloride and hydrogen gas a chemical or physical change?​

Answers

Answer:

chemical because it turned into a new compound

Explanation:

is zinc and hydrogen chloride combining into zinc chloride and hydrogen gas a chemical or physical change?​

physical change is like  boiling, melting, freezing, and shredding

but its still the same compound

chemical is like it turns into something else like a new compound

Zn + 2HCl = ZnCl2 + H2(g)

Metal + Acid → Hydrogen + Acid Anion

new compound forms in this reaction

quora

Les McLean

toppr

lewis acids and bases are most closely with which process?

Answers

Answer:

Lewis acids and bases are most closely associated with ELECTRON TRANSFER. A Lewis acid is defined as as a chemical specie that can accept an electron pair from a Lewis base to form a Lewis adduct while a Lewis base is defined as a specie which can donate an electron pair to a Lewis acid or an acceptor compound. Thus, Lewis base and acid has to do with electrons transfer.

Explanation:

which experimental technique was most likely used by the students to determine the rate of reaction?

Answers

The most common way to monitor the rate of reaction is by observing the increase in the absorbance of the solution.

What is the rate of reaction?

The rate of reaction is the rate at which reactants are converted into products or the rate at which the reactants disappear.

Given that the reaction is a colorimetric reaction, the most common way to monitor the rate of reaction is by observing the increase in the absorbance of the solution.

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q5:- Some green food colouring was carefully added to the bottom of a beaker of water using a syringe. The beaker was then covered and left untouched for several days.

Describe what would you observe after:-
a)
i) a few hours

ii) several days
b) explain your answer to question 5a using ideas of the kinetic particle theory.
c) state the physical process that takes place in this experiment.

Answers

The molecules of the green food coloring would disperse throughout the water.

Diffusion

i) In a few hours, the molecules of the green food coloring would have started dispersing throughout the water from the region of higher concentration to the region of lower concentration.

ii) In several days, the molecules would have uniformly dispersed through the water.

b) According to the kinetic theory of particles, matters, irrespective of their nature, are made up of small molecules that are in constant random motion. The direction and pace of movement depend on the energy they possess as well as the kind of relationship that exists between the small molecules.

c)The process that takes place in the experiment is known as diffusion.

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0. 820 mole of hydrogen gas has a volume of 2. 00 l at a certain temperature and pressure. What is the volume of 0. 125 mol of this gas at the same temperature and pressure?

Answers

The volume of 0.125 mole of the gas at the same temperature and pressure 0.30 L

Data obtained from the question Initial mole (n₁) = 0.82 moleInitial volume (V₁) = 2 LNew mole (n₂) = 0.125 molePressure = ConstantTemperature = ConstantNew Volume (V₂) =?

How to determine the new volume

The new volume can be obtained as illustrated below

PV = nRT

Divide both side by P

V = nRT / P

Divide both side by n

V / n = RT / P = Constant

Thus,

V₁ / n₁ = V₂ / n₂

2 / 0.82 = V₂ / 0.125

Cross multiply

0.82 × V₂ = 2 × 0.125

Divide both side by 0.82

V₂ = (2 × 0.125) / 0.82

V₂ = 0.30 L

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What is the name of this molecule?

Answers

Answer:

The name of this molecule structure is 1-Butyne

The name of the given molecule according to IUPAC is 1-Butyne. Thus, option C is correct.

What is IUPAC nomenclature?

The IUPAC nomenclature is given as the standard naming technique that is used to name a chemical compound. It is named with the following main rules.

The triple bond compound is an alkyne with the suffix -yne. The development of the name to the given structure is therefore given by counting the number of carbon atoms, and the location of the triple bond.

There are 4 carbon atoms in the structure with the triple bond at carbon 1, therefore the name will be 1-Butyne. Hence, option C is correct.

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A chemist divides a large sample of a mixture into three smaller portions. each of these portions contains different ratios of the component substances that make up the mixture. which description best fits the mixture? a. compound b. element c. heterogeneous mixture d. homogeneous mixture e. pure substance

Answers

A heterogeneous mixture is not uniform in composition. Hence, option C is correct.

What is a heterogeneous mixture?

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.

This substance is not an element or compound, because different components could be observed in the substance.  

A pure substance is made up of only one type of atom (element) or only one type of molecule (compound), mixtures and solutions are made from two or more types of pure substances.

For example, aluminium is an element and ammonia is a compound.

This substance is not a homogeneous mixture, because different samples of the substance appeared to have different proportions of the components.

Hence, this substance is a heterogeneous mixture.

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Answer:

heterogeneous mixture

Explanation:

Using a ph meter, you find the ph of an unknown solution to be 8. 0. How would you describe this solution?.

Answers

Answer:

Just Barely Base/Neutral

Explanation:

a pH of 8.0 is greater than Neutral (7.0) but is still neutral due to it being more neutral than a base

Describe the characteristics of a double replacement reaction, how identified, and types of compounds in the reactants and products. give an example in a response

Answers

The characteristics of a double replacement reaction as well as example to depict it are clearly explained below.

What are the characteristics of a double replacement reaction?

A double-replacement reaction is one that occurs when parts of two ionic compounds are exchanged thereby making two new compounds.

A characteristic of a double-replacement equation is that there are two compounds as reactants and two different compounds as products.

A precipitate forms in a double-replacement reaction when the cations from one of the reactants combine with the anions from the other reactant to form an insoluble ionic compound.

An example of a double displacement reaction is;

CuCl₂(aq) + 2AgNO₃(aq) → Cu(NO₃)₂(aq) + 2AgCl(s)

Due to the fact that a precipitate is formed, the double replacement reaction is also called a precipitation reaction.

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Which of the following is an example of a change from gravitational potential
energy to kinetic energy?

A. Hands being rubbed together
B. A skater coasting up a ramp
C. Fuel being burned in a car engine
D. A person going down a waterslide

Answers

Answer:

D. A person going down a water slide

Explanation:

There is a store of gravitational potential energy when they are at the top of the waterslide which is then converted to kinetic energy as they travel down. The gravitational potential energy is transferred because the person loses height as they go down the slide

why is the nitrogen important to humans

Answers

Nitrogen is important for all humans because it is a major part of amino acids, which are the building constituents of proteins and of nucleic acids such as deoxyribonucleic acid, which transfers genetic information to the next generation.

What is the nitrogen cycle?

It is the biogeochemical circuit that supplies nitrogen to living things and keeps it circulating in the biosphere.

Importance of the nitrogen :

The nitrogen that is part of the atmosphere in the form of N₂ cannot be used by animals and plants, and for this reason, this mechanism is needed to convert the N₂ into usable forms.

Following the order of the food chain, the nitrogen in the plants passes to the herbivorous animals and then to the carnivores, spreading between the different links of the food pyramid.

Humans use nitrogen to make amino acids, proteins, nucleic acids, and DNA.

Therefore, we can conclude that the nitrogen is a vital circuit for the existence of Humans and all other living organism since we are unable to fix nitrogen from its gaseous form.

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What volume of a 3.95 M
potassium chloride solution would
be needed to make 325 mL of a
2.76 M solution by dilution?
[?] mL of 3.95 M KCl

Answers

256 mL of 3.95 M KCI is needed

Which are the two major greenhouse gases?
OA. CO₂ and CH4
OB. 0₂ and H₂0
OC. CH₂0 and CO
OD. NO and NO₂2

Answers

Answer:

A. CO2 and CH4

The two major greenhouse gases are CO₂ and CH₄ and the correct option is option A.

What are Greenhouse Gases?

Greenhouse gases are gases in Earth’s atmosphere that trap heat. They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from leaving the atmosphere.

These gases have the property of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the greenhouse effect.

Each of these gases can remain in the atmosphere for different amounts of time, ranging from a few years to thousands of years.

Examples of greenhouse gases are carbon dioxide, methane and water vapour.

Therefore, the two major greenhouse gases are CO₂ and CH₄ and the correct option is option A.

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What mass of YCL3 forms when 10.0 grams of each reactant are combined?

Answers

The mass of [tex]YCl_3[/tex] that would be formed will be 18.22 grams

Stoichiometric calculations

Let us first look at the balanced equation of the reaction:

[tex]2Y + 3Cl_2 --- > 2YCl_3[/tex]

The mole ratio of Y to [tex]Cl_2[/tex] is 2:3.

Mole of 10.0 grams of Y = 10/88.9 = 0.11 moles

Mole of 10.0 grams  [tex]Cl_2[/tex] = 10/71 = 0.14 moles

3/2 of 0.11 = 0.165. Thus,  [tex]Cl_2[/tex] is limiting in availability.

Mole ratio of  [tex]Cl_2[/tex] and [tex]YCl_3[/tex] = 3:2

Equivalent mole of [tex]YCl_3[/tex] = 2/3 x 0.14 = 0.093 moles.

Mass of 0.093 moles [tex]YCl_3[/tex] =0.093 x 195.26 = 18.22 grams

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Use the periodic table to answer the following questions.

What is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium?

Be > Ca > Mg > Sr

Be > Mg > Ca > Sr

Ca > Sr > Be > Mg

Sr > Ca > Mg > Be

Answers

From the  highest to lowest Ionization Energies for beryllium, calcium, magnesium, and strontium, the order is:  Be > Mg > Ca > Sr

How to use the periodic table?

Ionization energy is defined as a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to give off an electron.

Now, ionization energy usually decreases as it descends in a group.  Thus, from the  highest to lowest for beryllium, calcium, magnesium, and strontium, the order is determined as:

Be > Mg > Ca > Sr

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Answer: B (BE > MG > CA > SR)

Explanation: ON EDGE

A gaseous hydrogen is stored at 500 Bar and 25 oC in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z

Answers

The mass of the hydrogen gas in tank, given the data is 6.17 Kg

Data obtained from the questionPressure (P) = 500 Bar = 500 × 0.986923 = 493.4615 atmTemperature (T) = 25 °C = 25 + 273 = 298 K Volume (V) = 220 L Gas constant (R) = 0.0821 atm.L/Kmol Compressibility factor (z) = 1.45Molar mass of hydrogen gas = 2.016 g/molMass of hydrogen gas (m) =?

How to determine the mass

PV = znRT

Divid both sides by zRT

n = PV / zRT

but

mole (n) = mass (m) / molar mass (M)

Thus,

m / M = PV / zRT

m = MPV / zRT

m = (2.016 × 493.4615 × 220) / (1.45 × 0.0821 × 298)

m = 6169 g

Divide by 1000 to express in Kg

m = 6169 / 1000

m = 6.17 Kg

Complete question

A gaseous hydrogen stored at 500 Bar and 25°C in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z = 1.45

3.06 kg

6.17 kg.

13.0 kg

5.05 kg

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the teacher prepares 2.50 liters (l) of a salt solution for a class experiment. how many quarts (qt) are in 2.50 l? (1 l =1.06 qt)

Answers

The amount of quarts in 2.50 L is 2.65 qt

How many quarts are in 2.50 l?

Since the teacher prepares 2.50 liters of salt solution for a class experiment, we require how many quarts there are in 2.50 liters.

Since we know that 1 L = 1.06 qt, converting liters to quarts, we have

2.50 L = 2.50 × 1 L

= 2.50 × 1.06 qt

= 2.65 qt

So, the amount of quarts in 2.50 L is 2.65 qt

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Question 1 of 32
How does soil begin to form?
A. Rock particles clump together in an aggregate.
B. Sediment stays and settles in a location.
C. Bedrock breaks down into smaller particles.
D. Sediment moves to a new location.

Answers

The answer is c I believe! The order that makes the most sense to me is c,d,b,a

what is the mass in grams of ba(io3)2 can be dissolved in 500 ml of water at 25 degrees celcius?

Answers

The mass of Ba(IO3)2 that can be dissolved in 500 ml of water at 25 degrees celcius is 2.82 g

What mass of Ba(IO3)2 can be dissolved in 500 ml of water at 25 degrees celcius?

The Ksp of Ba(IO3)2 = 1.57 × 10^-9

Molar mass of Ba(IO3)2 = 487 g/mol?

Dissociation of Ba(IO3)2 produces 3 moles of ions as follows:

[tex]Ba(IO_{3})_{2} \leftrightharpoons Ba^{2+} + 2\:IO_{3}^{-}[/tex]

[tex]Ksp = [Ba^{2+}]*[IO_{3}^{-}]^{2}[/tex]

[tex][Ba(IO_{3})_{2}] = \sqrt[3]{ksp} =

\sqrt[3]{1.57 \times {10}^{ - 9} } \\ [Ba(IO_{3})_{2}] = 1.16 \times {10}^{-3} moldm^{-3}[/tex]

moles of Ba(IO3)2 = 1.16 × 10^-3 × 0.5 = 0.58 × 10^-3 moles

mass of Ba(IO3)2 = 0.58 × 10^-3 moles × 487 = 2.82 g

Therefore, mass Ba(IO3)2 that can be dissolved in 500 ml of water at 25 degrees celcius is 2.82 g.

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how can one establish whether a liquid sample extracted from a plant is pure

Answers

The most accurate means of determining the purity of a substance is through the use of analytical methods. These methods, widely used in different industries, mostly involve chemical analysis, which can pinpoint the presence, identity and amount of impurities in the sample. The most simple chemical methods include gravimetry and titration. There are also the more advanced light-based or spectroscopic methods, such as UV-VIS spectroscopy, nuclear magnetic resonance and infrared spectroscopy. Chromatographic methods, such as gas chromatography and liquid chromatography, can also be used. Other methods used in testing the purity include mass spectroscopy, capillary electrophoresis, optical rotation and particle size analysis.

-basically nerdy talk for using machines controlling chemicals or other atoms to pinpoint any impurities

n
What is an isotope?

Answers

a species of an atom with the same chemical element and atomic number but with different atomic masses and physical properties. in other words, it’s a version of a chemical element.
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