what is coefficient.

Answers

Answer 1

Answer:

the number in front of the chemical

Explanation:

example: 4c is 4 carbon 4 os the coefficient of c


Related Questions

4. Indicate whether entropy increases or decreases in each of the following situations. a. The jigsaw puzzle is taken apart and put back in the box. b. Clothes are folded and put away. c. Ice turns into steam​

Answers

Answer:

Entropy generally increases when a reaction produces more molecules than it started with.

Explanation:

a. The jigsaw puzzle is taken apart and put back in the box.  entropy decreases

b. Clothes are folded and put away. entropy decreases

c. Ice turns into steam​. entropy increases

What is entropy?

Entropy is the measurement of the amount of heat energy per unit of temperature in a system that cannot be used for productive labor. Entropy is a measure of a system's molecular disorder or unpredictability since work is produced by organized molecular motion.

Entropy theory offers profound understanding of both the direction underlying spontaneous development for many commonplace events.

a. The jigsaw puzzle is taken apart and put back in the box.  entropy decreases

b. Clothes are folded and put away. entropy decreases

c. Ice turns into steam​. entropy increases

Therefore,

a. The jigsaw puzzle is taken apart and put back in the box.  entropy decreases

b. Clothes are folded and put away. entropy decreases

c. Ice turns into steam​. entropy increases

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molecules of i2 are produced by the reaction of 0.4321 mol of cucl2 according to the following equation. 2 cucl2 4 ki → 2 cui 4 kcl i2

Answers

[tex] \: 1.237 \times 10^{23} molecules \: of \:I _{2} \: are[/tex]

[tex]are\: produced \: and \: 53.74 \: g \: of \: I _{2} \: are[/tex]

produced from the reaction.

The overall balanced equation for the reaction is,

[tex]2CuCl_{2} + KI→2CuI + 4KCl + I_{2}[/tex]

[tex]Number \: of \: moles \: ofCuCl_{2}=0.4235 \: mol [/tex]

[tex]2 \: moles \: of \: CuCl_{2} \: produce \: \: 1 \: mole \: [/tex]

[tex]of \: I_{2}.[/tex]

[tex]2 \: mole \: of \: CuCl_{2} = 1 \: mole \: of \: I_{2}[/tex]

[tex]1 \: mole \: of \: I_{2} \: = 6.022 \times 10 ^{23} \: molecules \: of I_{2}[/tex]

So, the number of molecules produced in the reaction of

[tex] I_{2} \: are[/tex]

[tex] = \frac{0.4235 \times 6.022 \times 10 ^{23} }{2 } [/tex]

[tex] = 1.237 \times 10^{23} \: molecules \: [/tex]

[tex]1.237 \times 10^{23} \: molecules \: of \: I_{2} \: are \:[/tex]

produced from the reaction.

[tex]Mass \: of \: I _{2} \: produced \: are \: is ,[/tex]

[tex] = \frac{0.4235 \times 253.8}{2} [/tex]

[tex] = 53.74 \: g[/tex]

[tex] 53.74 \: g \: of \: I _{2} \: produced \: in \: the \:[/tex]

reaction.

[tex]Therefore , \: 1.237 \times 10^{23} molecules[/tex]

[tex]of \: I_{2} \: are\: produced \: and \: 53.74 \: g \: of[/tex]

are produced in the reaction.

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rate is always positive; it is defined as the change in concentration of reactants or products over a period of time. the only time a negative sign is used is when expressing the change in concentration of a reactant over time, such as −δ[a]/δt for the reaction a→b.

Answers

For the rate of reaction a negative sign is used is when expressing the change in concentration of a reactant over time, such as −δ[a]/δt for the reaction A→B. Because the concentration of the reactant goes on decreasing with the time to form product.

What is Rate of the Reaction?

The rate of reaction is defined as the rate of change of concentration of product and the concentration of reactant.

Let us considered a chemical reaction:

A → B

It can also be said that, rate of reaction is directly proportional to the concentration of reactant.

R = δ[B]/δt = -δ[A]/δt

Rate of the product is always positive because the concentration of the product always increases with time.

Thus, we concluded that due to continue decrease in the concentration of the reactant goes with time to form product, the rate of reaction expressed with a negative sign.

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a sample of blood is found to contain 64.5 micrograms of valproic acid. how many milligrams of valproic acid does this blood sample contain?

Answers

The valproic acid contains 0.0645 milligrams

Conversion scale

1000 microgram = 1 milligram

Data obatined from the question

From the question given, the following data were obtained:

Mass (in micrograms) = 64.5 microgramsMass (in milligrams) =?

How to convert 64.5 micrograms to milligrams

We can convert 64.5 micrograms to milligrams as illustrated below:

1000 microgram = 1 milligram

Therefore,

64.5 micrograms = (64.5 micrograms × 1 milligram) / 1000 microgram

64.5 micrograms = 0.0645 milligrams

Thus, the valproic acid contains 0.0645 milligrams

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the diameter of a hydrogen atom is about 1.05 cross times 10 to the power of negative 10 and exponent meters. a protein molecule has an overall length of 3000 times (or 3 cross times 10 cubed times) the diameter of a hydrogen atom.

Answers

Consequently, the protein molecule has a length of 315 x 10^-9 metres.

An atom of hydrogen contains what?Since it just has one proton and one electron, the hydrogen atom is the most basic of all atoms. The hydrogen atom can be found in three other isotopes: protium, deuterium, and tritium, in addition to this most prevalent form.The atomic number one of the lightest element is hydrogen, abbreviated H.How do you refer to an atom of hydrogen?Three isotopes of hydrogen are known. The isotopes of hydrogen have mass numbers of 1, 2, and 3, with mass 1 being the most prevalent. This isotope is also known as protium and is commonly referred to as hydrogen (symbol H, or 1H).

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Baking soda is also known as sodium hydrogen
carbonate. What is the mass of 1.00 mol of sodium hydrogen carbonate
(NaHCO.)?

Answers

There are 22.99⋅g sodium + 1.008⋅g hydrogen + 3×16.00⋅g oxygen + 12.0⋅g carbon = 84.0⋅g⋅mol−1. Therefore it is 84.00.g.mol^-1


What is the average atomic mass of a sample of Calcium, if you have 37
atoms of Calcium-40 and 10 atoms of Calcium-41?

Answers

The calculated answer is 40x2/6.023x10²³

Calcium is a mineral that is most frequently linked to strong bones and teeth, but it also plays a critical role in blood clotting, assisting with muscular contraction, and regulating regular heartbeats and nerve activity. Calcium has a 40g molar mass (mass of 1 mole). I'm assuming that all you're looking for is the mass of two calcium atoms, which is incredibly little:

A mole of calcium weighs 40g and contains 6.023 x 10²³ atoms.

There would be 1.328x10-22 g of calcium if 2 calcium atoms have a mass of 40x2/6.023x10²³.

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HELP ME PLEASE THIS IS SCIENCE ITS DUE SOON ONG lol
Which of these is the largest?

a chromosome
a cell
a gene

Answers

Answer:

A gene

Explanation:

A gene because you carry those traits from your parents and you keep passing those to your offsprings.

A gas tank has a volume of 28.1 m 3 and a pressure of 18.4 atm. The temperature of the gas is 32ºC. What is the Celsius temperature when the gas is put in an 11.2 m 3 tank with a pressure of 22.7 atm?

Answers

The Combined Gas Law states that
P
1
V
1
T
1
=
P
2
V
2
T
2
.
P
= Pressure
V
= Volume
T
= Temperature
Since we're using a gas tank and it isn't specified, I'm going to assume the Volume remains constant, so we can eliminate the Vs, giving us
P
1
T
1
=
P
2
T
2
.
Plugging in values:
18.4atm
32°C
=
22.7atm
T
2
We need to isolate the
T
2
, so we'll cross multiply and isolate the value.
T
2
18.4atm
=
22.7 atm * 32°C
T
2
=
22.7 atm * 32°C
18.4atm
Now let's simplify the equation. Our atm's cancel, giving us:
T
2
=
22.7 * 32°C
18.4
After calculating the values and applying sig figs (3 sig figs), we are given
39.5°C

Help :/
can someone explain to me how you solve this
Use atom economy to argue which of these processes may be greener.

Answers

By the principle of atom economy the second process is more efficient.

What is atom economy?

We know that the atom is the smallest particle of a substance that could take part in a chemical reaction. We are also aware that all compounds are composed of atoms and that a chemical reaction has to do with the rearrangement of atoms in such a way that be products could be formed.

In this case, we know that an organic product may be obtained in a sequence of reactions and the atom economy is very important in the nature of the process that is being carried out. Let us now take  good look at the two processes that could be shown.

In the first process, we can see that there are a lot of products that could just be classified as side products and does not have a real relevance to the final products. In the second process, we have only one waste product and that is water.

As such, by the principle of atom economy the second process is more efficient.

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3 naoh(aq) c₆h₈o₇(aq) ⇌ na₃c₆h₅o₇(aq) 3 h₂o(l) step 3: calculate the volume of titrant required to reach the endpoint. calculate the volume in ml of a 0.200 m naoh solution needed to neutralize 345 ml of 0.0333 m c₆h₈o₇ standard solution.

Answers

Volume of NaOH solution needed to neutralize C₆H₈O₇ is 56.825 ml

In titration reaction , at equivalence point

Moles of Acid = Moles of Base

If [tex]M_1[/tex] is mole of acid and [tex]V_1[/tex] is volume of acid

  [tex]M_2[/tex] is moles of base and [tex]V_2[/tex] is volume of base

Then [tex]M_1 V_1 = M_2 V_2[/tex]

Here in this question

[tex]M_1 = 0.200 M\\ M_2 = 0.0333 MV_1 = unknown\\V_2 = 345[/tex]

Therefore,

[tex].200 * V_1 = 0.033 * 345 ml[/tex]

[tex]V_1[/tex] =  [tex]0.033 *345 / .200[/tex]

[tex]V_1 = 56.825 ml[/tex]

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What is the function of an organ system?

a. to work together to do a specific job
b. to be a basic unit of organization with bodies
c. to organize a group of similar cells
d. to control movement in internal organs

Answers

Answer:

A

Explanation:

eg digestive system consists of ma y organs working towarss the break down of large insoluble food molecules

Answer:

A is the answer

Explanation:

Which is an example of a homogeneous mixture?
A. Apple juice
B. Vegetables soup
C.Pure Gold
D. H2O (water)

Answers

Answer:

H2o water is correct please mark as brainliest

When looking for a mathematical relationship between two variables use a

Answers

When looking for a mathematical relationship between two variables use a line graph.

What is a mathematical variable?

A mathematical variable is one that can be found by the use of algebra or by a the use of graph. We know that a line graph involves plotting the independent variable on the horizontal axis and the dependent variable on the vertical axis.

The relationship between the two variables can be determined by studying how much the data set suits a particular equation of line of best fit or by considering the correlation coefficient of the scatter plot.

Hence, when looking for a mathematical relationship between two variables use a line graph.

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Missing parts;

When looking for a mathematical relationship between two variables, use a _____.

A. line graph

B. circle graph

C. bar graph

D. data table

Does the mean molecular speed change as much as the temperature as the water heats up? Explain.

Answers

For each degree of temperature change, the mean molecular speed increases by about 1 m/s. At 100 °C, the mean molecular speed is about 17% faster than at 0 °C.

What is temperature ?

Temperature is a numerical expression of how hot (or energetic) stuff or radiation is.

There are three different types of temperature scales: those, like the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body; those that only depend on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by practical empirical properties of particulates rather than by theoretical principles.

Using a thermometer, one can gauge temperature. It is calibrated using different temperature scales, each of which historically defined itself using a different set of reference points and thermometric materials.

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Start with solid argon and explain how to make argon change to the liquid state and then to the gaseous state

Answers

Starting with solid argon at room temperature, we need to cool it to -189.2 c to convert it into the liquid state.

Then, we need to heat it slightly till it reaches a temperature of -185.7 c. At this temperature, the liquid argon will convert into gaseous argon.

There are three states of matter i.e, solid state, liquid state, and gaseous state. These states are interconvertible which means that we can convert a substance from one state to another.

The conversion from solid to liquid and then gas or vice versa happens at specific temperatures that are known as boiling point, melting point, freezing point, etc.

The melting point is the temperature at which a solid gets converted into a liquid.

The boiling point is the temperature at which a liquid gets converted into a gas.

The melting and boiling points of Argon are -189.2 °C and -185.7 °C respectively.

Thus, starting with solid argon at room temperature, we need to cool it to   -189.2 °C to convert it into the liquid state.

Then, we need to heat it slightly till it reaches a temperature of -185.7 °C. At this temperature, the liquid argon will convert into gaseous argon.

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A car is driving down a road. Is it possible for its position to be changing and its acceleration to be zero? Is it possible for its velocity to be changing and its accelera- tion to be zero? Explain.​

Answers

Answer:

Yes. As soon as acceleration disappears, the object just continues with whichever speed it has. The acceleration changes speed; is there no acceleration, then speed is constant.

Explanation:

cogswell me, zhang z, carriquiry al, et al. sodium and potassium intakes among us adults: nhanes 2003-2008. am j clin nutr. 2012;96:647-657.

Answers

It has been observed that most US adult intake high levels of sodium and low level of potassium.

The American Health Association (AHA) published in its reports that US adults consume food containing more sodium and avoid food containing potassium. It causes various side effects and health-related problems. It was estimated that 99.4% of the total United States adults intake high levels of sodium on daily a basis. AHA guidelines recommend (<1500 mg) of sodium to be consumed. They consume even more than the Institute of Medicine's tolerable upper Intake level which is 2300 mg.

In the US, adults aged over 51 years or people suffering from diabetes, chronic kidney disease, or hypertension are recommended by the Dietary Guidelines to reduce sodium intake to 1500 mg per day. The overall result suggested that 98.8% consumed more than 1500 mg per day, and 60.4% consumed more than 3000 mg per day. These calculations of intake are more than double the recommendation guidelines. Only less than 2% of US adults and around 5% of US men consumed less than 4700 mg per day of potassium.

Therefore, it is concluded that the maximum US adult intake is high levels of sodium and low level of potassium.

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Answer the questions please

Answers

The Newton's third law deals with action and reaction.

What is the Newton third law of motion?

According to Isaac Newton, there are three laws that govern the motion of an object and this is the field that we call dynamics. They deal with the interaction of the force that acts on a body and causes it to move. Three laws of Isaac Newton deals with the various aspects of the motion of an object.

The Newton third law of motion states that action and reaction are equal and opposite. This implies that, when a force is exerted on a body, the body exerts the same magnitude of force back on the person that exerted the force but in this case, the force is acting in opposite direction.

A typical example of this law is when a gun is fired. It observed that as the bullet leaves the gun as the force acts on it, the gun has to recoil. The recoil of the gun owes to the reaction force.

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What is the process that wears away the surface of the earth?

Answers

Answer:

erosion

Explanation:

erosion is when the top layer of the earth gets slowly worn away bhy water and ither stuff.

1.1 Which of the following statements is FALSE? As the temperature of the gas in the container increases,... A the molecules move more quickly. B the molecules expand. C the molecules collide more often. D the molecules move further apart. ​

Answers

Answer:

d is false

Explanation:

because when the Temperature of gas in the container increases the molecule increases or expands and collide

What is the atomic mass of Hafnium if in a sample, 10 have mass 176 amu, 38 have mass

177 amu, 54 have mass 178 amu, 28 have mass 179 amu, and 70 have mass 180 amu?​

Answers

The atomic mass of Hafnium is 357.1amu and atomic mass is the total mass of the subatomic particles in an atom and is measured in atomic mass units

Here given data is if in a sample, 10 have mass 176 amu, 38 have mass  177 amu, 54 have mass 178 amu, 28 have mass 179 amu, and 70 have mass 180 amu then

The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope

We have to find average atomic mass = ?

Average atomic mass = atomic weight of Hafnium/100

Now we can substitute the known values

Then, Average atomic mass = (176×10)+(177×38)+(178×54)+(179×28)+(180×70)/100

Average atomic mass = 357.1amu

357.1amu is the atomic mass of Hafnium

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what mass of sodium azide is required to produce 2.6 ft (73.6 l) of nitrogen gas with a density of 1.25 g/l?

Answers

When a chemical element's density and volume are known, the mass of the chemical element can be calculated by multiplying the density and volume. When determining the mass of a chemical element, the link between the quantity of moles and molar mass is occasionally used.

Volume (V) of Nitrogen gas = 73.6 lDensity (ρ) of Nitrogen gas = 1.25 g/lMolar mass of N2 = 28g/molMolar mass of sodium azide (NaN3) = 65g/molMoles (n) of N2 = mass of N2 gas/molar mass

                                = 73.6 * 1.25/28 = 3.29 moles

2NaN3→2Na+3N2, NaN3 is breaking into 2 moles of Na and 3 moles of NaN3.Using the above equation, no. of moles of NaN3 (N) = 2/3*n = 2/3*3.29 = 2.19 molesMass of sodium azide = N*molar mass = 2.19*65 = 142.35g

Therefore, the mass of sodium azide is 142.35g.

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the temperature of the mesosphere is much higher than the asthenosphere overall, but yet is is still a ductile solid. what keeps it from melting?

Answers

The temperature of the mesosphere is much higher than the asthenosphere overall, but yet is is still a ductile solid. The thing that keeps it from melting is high pressure.

What is the mesosphere?

The mesosphere plays a crucial role in protecting the earth. Most meteors and asteroids are destroyed by the mesosphere before they can impact the earth's surface.

An area of the Earth's atmosphere is called the mesosphere. Directly above the stratosphere and beneath the thermosphere lies the mesosphere. It covers a distance of 31 to 53 miles, or 50 to 85 kilometers, above our planet. The mesosphere's temperature falls with height.

It should be noted that this high pressure that keeps it solid in form and does not let it melt down.

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The temperature of the mesosphere is much higher than the asthenosphere overall, but yet is is still a ductile solid. what keeps it from melting?

Cool temperature

Distance from the sun.

High pressure

Low pressure

choose the true statement(s) about ions. to be marked correct, you’ll need to select all true statements, as there may be more than one correct answer.

Answers

Cations have more protons than electrons, Anions result when atoms gain an electron.

What are electrons ?

The electron, a subatomic particle, has a negative one elementary charge electric charge. The electron, a member of the first generation of the lepton particle family, is usually regarded as an elementary particle because it has no known components or substructure.

How electrons are in an atom ?

A few straightforward rules can be used to calculate the quantity of protons, neutrons, and electrons present in an atom. The atomic number and the number of protons in the atom's nucleus are equal (Z). A neutral atom has the same number of protons and electrons as protons.

Around the nucleus, electrons are positioned in several shells. Only a fixed amount of electrons can fit in each subsequent shell. Filling begins with the innermost shell.

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a. Write chemical formula of copper (I) oxide, iron (III) carbonate, and magnesium sulfate
b. Calculate the proportion by mass of the elements in each compound.

(Given: M(Cu) = 64 M(Fe) = 56 M(S) = 32 M(Mg) = 24 M(O) =16 M(C) = 12)

Answers

Chemical Formula : It is the method of showing the information about the chemical proportion of atoms of a given element.

Types of Chemical Formula : There are three types namely

1. Molecular

2. Empirical

3. Structural

a.  The chemical formula of the given compound asked in the problem are :

i. Copper (II) oxide - CuO

ii. Iron (III) Carbonate - Fe2(CO3)3

iii. Magnesium Sulphate - MgSO4

b. The proportion by mass of the given compound are :

i. CuO = Atomic mass of copper and oxygen are = 64 and 16

so, mass proportion = 64 / 16 = 4 : 1

ii. Iron Carbonate :  = 14 :1

iii. Magnesium Suphate - 24 / 32 = 3:4

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CAN SOMEONE PLS HELP PLS

an isotope of phosphorus contains 19 neutrons. construct the symbol for the isotope.

Answers

Answer:

Explanation:

The isotope Al-27 has 13 protons and 14 neutrons. Aluminium's average atomic mass is 26.981539 AMU

write and balance the equation showing the reaction between iron (iii) oxide and carbon monoxide to form iron (ii) oxide and carbon oxide

Answers

The balanced chemical equation showing the reaction between iron (iii) oxide and carbon monoxide to form iron (ii) oxide and carbon oxide is :

                     FE2O3 + 3CO → 2FE +3CO2

Two moles of iron with three moles of carbon dioxide gas are produced when one mole of iron(iii) oxide reacts with three moles of carbon monoxide

A balanced chemical equation is defined as the number of atoms of each type in the reaction being equal to the reactants and product sides.

The mass and charge is equal in a balanced chemical reaction.

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URGENT!! What is the consequence of carbon's unique bonding ability?

It can only bond with a select few elements.

It is very rarely found in molecules.

Only one carbon atom can be present in a molecule at a time.

It forms the basic building blocks of organic molecules.

Answers

It forms the basic building blocks of organic molecules this is the carbon's unique bonding ability

Carbon is an essential building block of organic molecules. this is because it has a unique molecular structure that allows it to form many strong bonds with itself and other crucial elements and it is typically combined with hydrogen to form hydrocarbons and hydrocarbons can have single, double, or triple bonds between carbon atoms. carbon atoms can form four covalent bonds and it make strong bond because any molecule are formed with carbon so is does't found rarely in molecule and only one carbon is not present in molecule at a time there are so many carbons are present

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Calculate the heat energy released when 29. 5 g of liquid mercury at 25. 00 °c is converted to solid mercury at its melting point. Constants for mercury at 1 atmheat capacity of hg(l) 28. 0 j/(mol⋅k) melting point234. 32 kenthalpy of fusion2. 29 kj/mol

Answers

0.3271 kJ is the heat energy released when 29. 5 g of liquid mercury at 25. 00 °c is converted to solid mercury at its melting point. Constants for mercury at 1 atmheat capacity of hg(l) 28. 0 j/(mol⋅k) melting point234. 32 k enthalpy of fusion 2. 29 kj/mol

First convert the temperature into kelvin.

25.00°C+273.15=298.15K

Now convert the hear capacity into J/g.K

28.0(j/mol.K)×1mol/200.59g

=0.1396J/g.K

Now calculate the hear transferred using the specific heat of mercury

q=mcΔT

q=(29.5g)0.1396J/gK)(234. 32 -298.15 K)

q=-262.85 j = -0.26286 Kj

The calculation would involve the enthalpy of fusion, but with a negative sign.

(29.5g Hg)(1mol/200.59g Hg)×-2.29Kj/mol= -0.064221 Kj

Add the heat transferrers of both process together

-0.26286 Kj-0.064221 Kj = -0.327081

The total heat released is 0.3271 kJ.

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