Can the excess reactant control the percentage yield

Answers

Answer 1

Explanation:

when one reactants is in excess, there will always be some left over. The other reactants becomes limiting factor and controls show much of each product is produced.while using excess percentage yields this is at the expense of atom economy.


Related Questions

Force is measured in this unit

a. grams
b. m/s
c. newtons
d. m/s/s

Answers

Answer:

Force is measured in Newtons, which are units that equal 1 kg * m/sec 2. Force is measured in Newtons, N. Mass is measured in kilograms, kg. The unit that is used to measure force in the SI system of units is the Newton.

Answer is Newtons because I looked it up

. A scientist placed a sample of lithium into a container of water. The scientist observed the lithium floating and making a buzzing sound as gas bubbles were forming around it. Which conclusion is BEST supported by this observation

Answers

Answer: The conclusion that best support the observation is that (A CHEMICAL CHANGE took place).

Explanation:

A chemical reaction is defined as the process by which two or more substances, which are often referred to as REACTANTS, combine through bond formation or dissociation of bonds to form new PRODUCTS. In this type of reaction, a CHEMICAL CHANGE occurred because a new substance is formed as a result of the chemical reaction that took place.

There are different characteristics of a reaction which shows that a chemical change has occurred, these includes:

--> Color Change

--> Production of an odor

--> Change of Temperature

--> Evolution of a gas (formation of bubbles)

-- Precipitate (formation of a solid)

From the chemical reaction in the given question, Lithium metals reacts slowly with water to form a colourless solution of lithium hydroxide (LiOH) and hydrogen gas (H2). Here we observe that the buzzing sound of formed gas bubbles shows that a gas was given off. Therefore in conclusion, a CHEMICAL CHANGE took place.

Your silver watchband has a mass of 326 g. How many moles of Ag do you have?

Answers

Answer:

3.02 moles

Explanation:

Converted using mole calculator.

Answer:

[tex]\boxed {\boxed {\sf 3.02 \ mol \ Ag}}[/tex]

Explanation:

We want to convert grams of silver to moles of silver. We can do this in 2 steps.

1. Convert Grams to Moles

We can convert grams to moles using the molar mass. It tells us the mass of 1 mole of a substance.

This is a value found on the Periodic Table. It is the same value as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu). Look up silver's molar mass.

Ag: 107.868 g/mol

Let's make a ratio using the molar mass.

[tex]\frac{107.868 \ g\ Ag}{ 1 \ mol \ Ag}[/tex]

Since we are converting 326 grams to moles, we multiply by that value.

[tex]326 \ g\ Ag*\frac{107.868 \ g\ Ag}{ 1 \ mol \ Ag}[/tex]

Flip the ratio so the units of grams of silver cancel.

[tex]326 \ g\ Ag*\frac{ 1 \ mol \ Ag}{107.868 \ g\ Ag}[/tex]

[tex]326*\frac{ 1 \ mol \ Ag}{107.868}[/tex]

[tex]\frac{ 326}{107.868} \ mol \ Ag[/tex]

[tex]3.02221233359 \ mol \ Ag[/tex]

2. Round

The original measurement of mass (326 grams) has 3 significant figures, so our answer must have the same.

For the number we found, that is the hundredth place. The 2 in the thousandth place (3.02221233359) tells us to leave the 2 in the hundredth place.

[tex]3.02 \ mol \ Ag[/tex]

A silver watchband with a mass of 326 grams is equal to 3.02 moles of silver.

Which is the correct bond type for a compound of CO2?

A. IONIC
B. COVALENT
C. METALLIC.
D. NONE OF THE ABOVE

Answers

Answer:

Explanation:

it is a covalent bond

carbon atom contains 4 electrons in its valance shell.here,carbon atom shares two of its electrons with two electrons of each oxygen atom forming double covalent bond and forms C02 molecule.

Calculate the pH of 1.0 X 10^-4 M HNO3

Answers

Answer:

pH = 4

Explanation:

Given that,

The concentration of [H⁺] is [tex]10^{-4}\ M[/tex]

We need to find the pH of the solution. We know that,

[tex]pH=-log[H^+][/tex]

Also,

HNO3 → H+ + NO-3

Put all the values,

[tex]pH=-log[1\times 10^{-4}]\\\\pH=4[/tex]

So, the pH of the solution is equal to 4.

Fossil fuels are made up of
A. aromatic hydrocarbons
B. acids
C. hydrocarbons
D. optical isomers​

Answers

Answer:

I think its option C

Explanation:

Answer:

C. Hydrocarbons

Explanation:

I think it is C

please answer cansend to me​

Answers

the answer is thank u for the points!
What? It’s too blurry try doing it again

A fire is an example of an exothermic reaction. Which of the following best
supports that statement?
A. The fire is creating energy.
B. The fire is releasing energy.
C. The fire is capturing energy.
D. The fire is destroying energy.

Answers

Answer: B. Fire is releasing energy

Explanation:

Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?

Answers

Latent heat of fusion is the heat required to change 1 kg of a solid substance into liquid state at the melting point of the substance. For example, amount of heat required to melt ice at 0° C into water at 0° C, will be known as the Latent Heat of Fusion of ice.

Answer:

Explanation:

Latent heat of fusion, also known as enthalpy of fusion, is the amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to trigger a change in its physical state and convert it into a liquid (when the pressure of the environment is kept constant). For example, the latent heat of fusion of one kilogram of water, which is the amount of heat energy that must be supplied to convert 1 kg of ice without changing the temperature of the environment (which is kept at zero degrees celsius) is 333.55 kilojoules

The latent heat of fusion of a substance also accounts for the energy required to accommodate any increase in the volume of the substance post the change of its physical state. The temperature at which the substance undergoes the phase transition is called the melting point of the substance. Unless specified to be otherwise, the pressure of the environment (when expressing the latent heat of fusion of a substance) is always assumed to be 1 atmosphere of pressure (which is roughly equal to 101.325 kilopascals).

Which statement compares the relative strength of the electric forces that hold particles together

A. The force between two nonpolar molecules are stronger than the force between positive ions and freely moving electrons

B. The force between two polar molecules are stronger than the force between positive ions and freely moving electrons

C. The force between positive and negative ions is weaker than the force between two polar molecules

D. The force between two nonpolar molecules is weaker than the force between positive ions and freely moving electrons

Answers

A.the force between two non polar molecules are stronger than the force between positive ions and freely moving electrons

PLS HELP NO LINKS
Suggest at least three ways to reduce or eliminate the amount of air pollution in pennsylvannia, bloomsburg.

Answers

Instead of driving, bicycle, walk, or run. If you must drive, combine errands into one trip.
Don’t “top-off” your gas tank and tighten the gas cap. Spillage adds two tons of air pollution daily.
Get the junk out of your trunk! An extra 100 pounds reduces gas mileage by up to 2%.
Avoid aggressive driving. Speeding, rapid acceleration, and hard braking can reduce gas mileage by 33% at highway speeds.
Slow down and save. Each 5 MPH that you drive over 60 MPH reduces fuel economy by up to 5%.
Turn it off! Idling your car or truck wastes gas and pollutes the air.
Install a programmable thermostat in your home – no lower than 78 in summer.

A chemist prepares a solution of silver perchlorate (Agcio) by measuring out 0.91 kg of silver perchlorate into a 400 ml. volumetric flask and filling the flask
to the mark with water
Calculate the concentration in mol L of the chemist's silver perchlorate solution. Be sure your answer has the correct number of significant digits.

Answers

Answer:

오빠nsuensojee9ejenheie

Which of the following are acid formulas? (Choose 2)
NH3
CH3OH
NaOH
HNO3
H2SO4
CH4

Answers

Answer:

HNO3 & H2SO4

Explanation:

HNO3 is Nitric acid and H2SO4 is Sulphuric acid

Why does the rate of the forward reaction increase when the surface area of a reactant is increased
?
When the surface area increases, the concentration of the substance increases, which reduces
the number of effective collisions.
When the surface area increases, the temperature of the system increases, which in turn
increases the number of effective collisions.
When the surface area increases, the density of the substance increases, which increases the
number of collisions.
When the surface area increases, the number of particle collisions increases, which in turn
increases the number of effective collisions.

Answers

Increasing the surface area of a reactant increases the frequency of collisions and increases the reaction rate. Several smaller particles have more surface area than one large particle. The more surface area that is available for particles to collide, the faster the reaction will occur.

Electrical charge of an alpha particle is,

A. +1

B. +2

C. +3

D. +4

Answers

Electrical charge alpha particle is +2
Plus 2 is the correct answer have a nice day

in order to balance the reaction, what number needs to go in front of F(2)?​

Answers

Answer:

NA + F2 = NAF - Chemical Equation Balancer.

2 Na + F 2 → 2 NaF

Na is a reducing agent, F 2 is an oxidizing agent. ; Pale-yellow to greenish gas with a pungent, irritating odor.

Can u please help me

Answers

Answer:

they are all true

Explanation:

How many ml of a 6.00M HNO would be required to prepare 200ml of a 2.50M
solution?
83.33ml
72.98ml
86.23ml
64.98ml

Answers

Answer:

83.33ml

Explanation:

Firstly, let's notice that 200ml are equal to 0.2L

M=number of moles of the solute ÷ number of liters. Let's call the number of liter by x:

2.5=x÷0.2

x=2.5×0.2

x=0.5

It means you'll need 0.5 mol of HNO. But your solution have 6 moles per liter, so how much do you need? Divide the moles by 12 to have 0.5, so now you need to divide the liter per 12 too. The liter is equal to 1000ml, so:

1000ml÷12=83.33ml

The galvanic cell illustrated above generates a potential of +1.10V. For the construction of a second galvanic cell (not shown), only one modification was made: the Cu electrode has double the mass of the Cu electrode in the first cell. Which of the following correctly compares the initial E° for the second cell to that of first cell at 298K, and why?

Answers

Answer:

The initial  E°  for the second cell is the same as for the first cell.

Explanation:

Because the overall chemical reaction that occurs in the cell does not change.

The first galvanic cell generated the cell potential of +1.10 V. The second galvanic cell generates the same cell potential because the overall cell reaction remains the same.

What is a galvanic cell?

The galvanic cell is given as the electrochemical cell that generates the exchange of chemical and electrical energy.

The cell potential is described as the rate of reaction with the difference in the potential of the cathode and the anode.

The reduction and the oxidation potential are governed by the number of electrons transferred in the chemical reaction.

In the second galvanic cell, the number of electrons transferred from the copper electrode will be equivalent to the first electrode, as the chemical reaction is the same. Thus, the cell potential of the second galvanic cell will be the same as the first cell.

Learn more about galvanic cell, here:

https://brainly.com/question/25606438

2KOH + H2SO4 → K2SO4 + 2H20

What mass of water would be produced if 19.6g of KOH were reacted?

Answers

19.6 × ( 1 mol KOH / 56 grams KOH )

= 0.35 mol KOH

_________________________________

0.35 mol KOH ×( 2 mol H2O / 2 mol KOH )

= 0.35 mol H20

_________________________________

0.35 mol H2O × ( 18 g H2O / 1 mol H2O )

= 6.3 grams H2O

Someone help pleaseeee I will give brainliest

Answers

Answer:

2-Methylhexane

Because Ethylexane does not have hydrogen molecules neither,also it only has 2 options but they're just repeated

can someone do my watershed project ill give brainly and 80 points

Answers

What exactly is the project about ?????

What is the chemical formula of diphosphorus monoxide?

Answers

Answer:

The chemical formula of diphosphorus monoxide is OP2.

I'm not sure if this is correct, but hope it helps! :)

which of the following elements is a metal in the periodic table​

Answers

Answer:

12  My     Magnesium

13 Al Aluminum

19 K Potassium

20 Ca Calcium

Explanation:

I think

HELP PLEASE!!!!!
What is the molarity of a solution prepared by dissolving 30.0 grams of NaOH in enough water to make a solution with a total volume of 2.40 liters? (5 points)

0.150 M NaOH

0.218 M NaOH

0.313 M NaOH

0.462 M NaOH

Answers

Answer:

0.313 M NaOH

Explanation:

Got it right on the test.

Taking into account the definition of molarity, the molarity of the solution is 0.313 M.

Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

This case

In this case, you know:

number of moles= 30 grams×[tex]\frac{1 mole}{40 grams}[/tex]= 0.75 moles (being 40 [tex]\frac{grams}{mole}[/tex] the molar mass of NaOH)volume= 2.40 L

Replacing in the definition of molarity:

[tex]molarity=\frac{0.75 moles}{2.40 L}[/tex]

Solving:

molarity= 0.313 M

Finally, the molarity of the solution is 0.313 M.

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

#SPJ2

2.
The atoms that make up nitrogen gas...
N2
A share two covalent bonds.
B. have a definite shape.
1
C. share a pair of neutrons.
D. have two free electrons.

Answers

Answer:

A they share two covalent bonds

What is the chemical formula of polypropylene?

Answers

Answer:

(C3H6)n

Explanation:

the chemical formula is (C3H6)n

C3h6 is the formula for polypropylene

hlight
How are rocks weathered as in this example seen here?
ame
aining
22:01
Tools
A)
The rocks change their composition.
B)
The rocks are being chemically weathered by the water.
Freezing and thawing of water breaks the rocks into pieces.
D)
Hot lava is pushing on the rock and breaking it into pieces.

Answers

Answer:

B). The rocks are being chemically weathered by the water.

Explanation:

Because the water is slowly destroying the rock

Please help with this , thanks you guys very much

Answers

Answer:

I am giving u some explanation related this question pls see that

it may help u

Explanation:

The pH scale measures how acidic an object is. Objects that are not very acidic are called basic. The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7. This value is considered neutral—neither acidic or basic. Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0. A decrease in pH values from 5.0 to 4.0 means that the acidity is 10 times greater.

How pH is Measured

There are many high-tech devices that are used to measure pH in laboratories. One easy way that you can measure pH is with a strip of litmus paper. When you touch a strip of litmus paper to something, the paper changes color depending on whether the substance is acidic or basic. If the paper turns red, the substance is acidic, and if it turns blue, the substance is basic

A piece of metal weighing 59.047 g was heated to 85.2°C and then put into 100.000 g of
water at 23.7°C. The metal and water were allowed to come to an equilibrium
temperature of 24.8°C. Calculate specific heat of the metal. Show work please.

Answers

Dayumm you failing dawg
Other Questions
Meter is: a) A dance competition b) A musical instrument c) A device that handles the tempo of a song Admission of California as a State Assume that one year ago, you bought 260 shares of a mutual fund for $19 per share and that you received an income dividend of $0.14 cents per share and a capital gain distribution of $0.24 cents per share during the past 12 months. Also assume the market value of the fund is now $15 a share. Calculate the total return for this investment if you were to sell it now. Which is the best description of obesity? whats a structural observation for a leaf and the flower (red tulip) ''A florist measures the lengths of roses. The lengths in inches of a dozen roses are given below'' I'm really confused. The area of a rectangle is 342 square units. Its length measures 19 units. Find thelength of its diagonal. Round to the nearest tenth of a unit. On the Print screen, which portion shows you a sample of how the publication will look when printed?PrinterSettingsNumber of CopiesPrint Preview What do the underlined details show about Arturos feelings toward the dishwasher? 1. What was Cornwallis's mistake in battle strategy?2.Why might reaching a peace treaty have taken so long? Elijah puts $550 in an account earning 8% simple interest annually. What is the total amount of money he will have in his account after 6 years, if no withdrawals or deposits are made? Rectangular prisms have 8 corners and 6 faces. What is the ratio of corners to faces in rectangular prisms? PLEASE HURRY, WILL GIVE BRAINLY TO CORRECT ANSWER!which of the following makes it difficult to reach and explore the outer planets? 1. the surfaces are too icy and slippery to land on.2. they contain a lot of helium in their atmospheres.3. massive storms with fast winds cover the surfaces.4. none of the above.5. both 1 and 26. both 2 and 3. What is the path of an electron moving perpendicular to a uniform magnetic field? How can you use a unit cube to find the volume of a prism? Explain.(points) PLEASE ANSWER THISFOR POINTS Find the rate of change between:(1, -1)(2,4) QUESTION:What is smog and how is it formed?Help plz..And No links!! I repeat No links!! Tickets for the basketball game were sold at 4$ for adults and 2.50$ for students. If 320 tickets were sold for a total of 1100$, how many students tickets were sold? How many adult tickets were sold? How old were girls who were selected to become Chosen Women? What did they learn to do in the convents?