If the reaction yield is 88.2%,what mass in grams of hydrogen is produced by the reaction of 7.73 g of magnesium with 1.31 g of water
Mg + 2h2o >>mg(oh)2+h2

Answers

Answer 1

Answer:

Mass of hydrogen produced is 0.07g.

Explanation:

Given data:

Mass of magnesium = 7.73 g

Mass of water = 1.31 g

Reaction yield = 88.2%

Mass of hydrogen produced = ?

Solution:

Chemical equation:

Mg + 2H₂O     →   Mg(OH)₂ + H₂

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 1.31 g / 18 g/mol

Number of moles = 0.07 mol

Number of moles of magnesium:

Number of moles = mass/ molar mass

Number of moles = 7.73 g / 18 g/mol

Number of moles = 0.43 mol

Now we will compare the moles of water and magnesium with hydrogen.

                    Mg            :           H₂

                     1               :            1

                    0.43          :          0.43

                    H₂O          :             H₂

                      2             :              1

                   0.07           :            1/2×0.07 = 0.035

Mass of hydrogen:

Mass = number of moles × molar mass

Mass = 0.035 mol × 2 g/mol

Mass = 0.07  g

Answer 2

Answer: 0.064 grams is the answer

Explanation:

at the end you must multiply 88.2/100*0.073=0.064


Related Questions

Nervous tissue transmits messages throughout the human body by

contracting.

providing protection.

conducting impulses.

absorbing vital nutrients.

Answers

Answer: conducting impulses

Explanation:

just did it on edge

Answer:

c. conducting impulses.

Explanation:

got it right on edg, hope this helps!

How would I create a Lewis dot structure with the compound: CHBr2Cl

Answers

there is a lewis dot calculator on google if that helps

Answer:

Step 1: Find the Total Number of Valence Electrons. ...

Step 2: Find the Number of Electrons Needed to Make the Atoms "Happy" ...

Step 3: Determine the Number of Bonds in the Molecule. ...

Step 4: Choose a Central Atom. ...

Step 5: Draw a Skeletal Structure. ...

Step 6: Place Electrons Around Outside Ato

Explanation:

If 116 g of butane burns in the presence of 320. g of oxygen how much carbon dioxide will be produced? CO2 produced in grams

Answers

Answer:

270.77 g of CO2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2C4H10 + 13O2 —> 8CO2 + 10H2O

Next, we shall determine the masses of C4H10 and O2 that reacted and the mass of CO2 produced from the balanced equation. This can be obtained as follow:

Molar mass of C4H10 = (12×4) + (10×1)

= 48 + 10 = 58 g/mol

Mass of C4H10 from the balanced equation = 2 × 58 = 116 g

Molar mass of O2 = 2 × 16 = 32 g/mol

Mass of O2 from the balanced equation = 13 × 32 = 416 g

Molar mass of CO2 = 12 + (16×2)

= 12 + 32 = 44 g/mol

Mass of CO2 from the balanced equation = 8 × 44 = 352 g

Summary:

From the balanced equation above,

116 g of C4H10 reacted with 416 g of O2 to produce 352 g of CO2.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

116 g of C4H10 reacted with 416 g of O2.

From the above, we can see that a higher mass of O2 i.e 416 g than what was given i.e 320 g his needed to react completely with 116 g of O2. Therefore, O2 is the limiting reactant and C4H10 is the excess reactant.

Finally, we shall determine the mass of CO2 produced from the reaction.

In this case, we shall use the limiting reactant because it will give the maximum yield of CO2.

The limiting reactant is O2 and the mass of CO2 produced can be obtained as follow:

From the balanced equation above,

416 g of O2 reacted to produce 352 g of CO2.

Therefore, 320 g of O2 will react to produce = (320 × 352)/416 = 270.77 g of CO2.

Thus, 270.77 g of CO2 were obtained from the reaction.

What do we call the study of matter and how matter changes?

Answers

Answer:

Explanation:

Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.

What is conduction?

Transfer of heat through circular movement
Transfer of heat through direct physical contact
Transfer of heat through electromagnetic waves
Transfer of heat through the movement of part

Answers

Answer:

Transfer of heat through direct physical contact

Explanation:

The meaning of conduction is the transfer of heat directly transmitted through a substance when there is the difference between temperature and electrical potential. Hope it helps!

Answer:

B

Explanation:

Ok here is the next one
I’m counting on you
Thanks.

Answers

food moves through the mouth by muscle movement

18. Which of these is an ion?
A. Fluorine with 9 protons
B. Calcium with 18 electrons
C. Calcium with 18 neutrons
D. Fluorine with 9 neutrons

Answers

It is c. Calcium with 18 neutrons

How many elements are in H2CrO4

Answers

There are 7 elements

Answer:

3 elements

Explanation:

The elements are:

- Chromium

- Hydrogen

- Oxygen

What is the same on the left and right side of a balanced equation? Explain your answer.

Answers

Answer:

Number of atoms of elements are same on left and right side of balance equation.

Explanation:

Every chemical reaction must follow the law of conservation of mass. According to which mass can neither be created nor destroy but it change from one to another form. It means mass remain conserved. That is why we need to balance the chemical equation because mass remain same on both side of equation. Consider the example,

Chemical equation:

N₂ + H₂    →   NH₃

We can see that nitrogen and hydrogen react with each other and from ammonia. We need to balance the equation to have equal amount on both side.

Balance chemical  equation:

N₂ + 3H₂    →   2NH₃

It means mass remain same but change from one to another form.

A balanced equation is one that is having a chemical reaction where the numbers of atoms. Here the number of elements in each reaction and the total charges are the same. This includes both the reactant and the product.

However, the mass and charge are balanced on both sides of the reaction. Hence the left and the right side is always equal to the number of atoms. Thus the chemical reaction is a balance of atoms involved in the reaction.

Learn more about the same on the left and right sides of a balanced equation.

brainly.ph/question/20750343.


A piece of metal is composed of atoms. Each atom in the metal contains 29 protons. How is the metal classified?

Answers

Answer:

The metal is Copper

Explanation:

Matter is composed of atoms, which is the smallest indivisible particle of an element. The atom of an element consists of three subatomic particles namely: proton, electron and neutron etc.

The proton, which is the positively charged particle, is equal to the electron, which is the negatively charged particle. The proton number of the atom is the ATOMIC NUMBER of an element.

In the periodic table, the element with atomic number 29, which also means proton number 29 is Copper (Cu).

which statement differentiates between prokaryotic cells and eukaryotic cells?
A.Eukaryotic cells have DNA: prokaryotic cells do not.
B. Prokaryotic cells have DNA: eukaryotic cells do not.
C. Eukaryotic cells have nuclei: prokaryotic cells do not.
D. Prokaryotic cells have nuclei: eukaryotic cells do not.

Answers

Answer:

It is C

Explanation:

It is because Prokaryotic cells mostly don't have a nucleus.

Answer:

It is C.Eukaryotic cells have nuclei; prokaryotic cells do not

Explanation:

I just watched a video of it.

Which statements about exothermic and endothermic reactions are correct? (its a multiple choice question)

1 During an exothermic reaction, heat is given out.

2 The temperature of an endothermic reaction goes up because heat is taken in.

3 Burning methane in the air is an exothermic reaction.

A) 1.2 and 3
B) 1 and 2 only
C) 1 and 3 only
D) 2 and 3 only​

Answers

Answer:

C)1 and 3 only☺️

Explanation:

PLS HELP ITS URGENT
Some plant cells need energy to carry nutrients across the cell membrane. Which type of energy transformation does these plant cells use to bring the nutrient molecule inside the cell membrane?

thermal energy to kinetic energy

potential energy to light energy

chemical energy to kinetic energy

kinetic energy to potential energy

Answers

Answer:

Answer

The answer is option 4

The energy transformation during nutrients transportation across the cell membrane is transformation from chemical energy to kinetic energy, where the uphill and downhill movements of molecules based on concentration gradient carries the whole process.

What is energy transformation?

The total energy in a system is always conserved. However, one form of energy can be transformed into another form. For example we uses electrical devices such as bulbs fan etc, wherever the energy transformation is getting way from electrical energy to light or mechanical energy.

In plant cells nutrient molecules and ions are balanced inside and outside the cell and hence they are transported across the cell membrane by a concentration gradient with a chemical energy produced by the molecules.

The chemical energy inside of the ions and molecules converts to kinetic energy to transport itself through downhill and uphill mechanisms with aid of various enzymes and electron channels.

To find more on energy transformation, refer here:

https://brainly.com/question/29102331

#SPJ6

how many moles in 1.505x10^23 Na atoms

Answers

Answer:

The answer is 0.25 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 1.505 × 10²³ Na atoms

We have

[tex]n = \frac{1.505 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{4} \\ [/tex]

We have the final answer as

0.25 moles

Hope this helps you

When iron reacts with oxygen, it forms iron oxide, or rust.
4 Fe + 3 O2 2 Fe2O3

If 112 g of iron (Fe) combines with 24 g of oxygen (O2), how much iron oxide is formed?

Answers

Answer:

Mass of iron oxide: 79.85 g  

Explanation:

Given data:

Mass of iron = 112 g

Mass of O₂ = 24 g

Mass of iron oxide formed = ?

Solution:

4Fe + 3O₂         →       2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles =  2 mol

Number of moles of O₂:

Number of moles = mass/ molar mass

Number of moles = 24 g/ 32 g/mol

Number of moles =  0.75 mol

Now we will compare the moles of oxygen and iron with iron oxide.

                 Fe           :             Fe₂O₃

                 4             :                2

                 2             :                2/4×2 =  1

                O₂            :             Fe₂O₃

                 3             :                2

                 0.75       :                2/3×0.75 =  0.5

The number of moles of iron oxide formed by oxygen are less thus it will be limiting reactant.

Mass of iron oxide:

Mass = number of moles × molar mass

Mass = 0.5 mol  × 159.69 g/mol

Mass = 79.85 g  

Answer:

136 g Fe2O3

Explanation:

study island

An object with a mass of 15 kg has an acceleration of 3 m/s/s. What is the force
applied to the object? *
45 N
5N
18 N

Answers

Answer:

45N

Explanation:

force=mass×acceleration

Which phrase is not an example of intercellular communication?

A chemical messengers dock onto receptors of adrenal gland

B chemical signal from pituitary gland to adrenal gland

C electrical signals pass between heart cells

D a vesicle encloses over a nutrient molecule

Answers

Answer: The answer is D

Explanation: I took the quiz just now and got it right

The correct answer is:

D.(a vesicle encloses over a nutrient molecule)

I took the test, hope this helps!

2. How does friction effect speed?

Answers

Answer:

It acts as a force upon it like in newtons first law of motion an object in motion will stay in motion until a force acts upon it So friction bascicallly slows it down or stops it completly

Explanation:

what is the chemical formula for the magnesium ion and the carbonate ion?​

Answers

Answer: The formula for magnesium carbonate is MgCO_3.

Explanation:

Calculate the atomic mass of the unknown element X described below.
Please help

Answers

Answer:

286

Explanation:

Add atomic mass of all the Isotopes,

                                          Outcome = 825

divide it by number of isotopes which is 4 because there are 4 isotopes

                       Atomic mass of x = [tex]\frac{825}{4}[/tex]

                       Atomic mass of x is 286

The atomic mass of the unknown element X is 206 amu. Thus option B is correct.

What is atomic mass?

Atomic mass is defined as the relative mass of the element's atom in comparison to the mass of an atom of the C12 isotope.

In an example, the general atomic mass is the average of the atomic masses of a large number of different isotopes.

First we added atomic mass of each isotopes

= 204 + 206 + 207 + 208 = 824

Now to calculate the atomic mass of element X we divide it by 4 as there is four isotopes

So, atomic mass = 824 / 4

                           = 206 amu

Thus, the atomic mass of the unknown element X is 206 amu. Thus option B is correct.

To learn more about atomic mass, refer to the link below:

https://brainly.com/question/17067547

#SPJ5

What was the average speed of the truck for this trip?

Answers

Picture? So I know what I’m doing lol

What is epithelial tissue characterized by?

closely packed cells

sarcomeres

many cell junctions

an extracellular matrix

Answers

Answer:

closely packed cells

many cell junctions

Explanation:

Answer:

A,B

Explanation:

EDGE2021

Mass can be changed into energy in a ____ reaction
A)Chemical
B)Nuclear

Answers

b! is the answer please give me a thanks hehehehheheehhehehe

Help me lol
I’ll give branliest if two people answer

Answers

Answer:

I think all of the above

Explanation:

Put as brainliest if you wish

it is all of the above

While looking at calcium (Ca) on the periodic table, a student needs to find an element with a greater atomic mass in
the same period. Where should the student look?
O directly up
O directly down
O directly to the left
O directly to the right

Answers

Answer:

D. Directly to The Right

O.directly to the right

HEEELLLPPPP:(!!!!! im stuckkkk!!!

Answers

Answer:

LIGHT

AIR

SHELTER

FOOD

WATER

Answer:

light

air

shelter

food

water

an atom has 79 protons, 78 electrons and a mass number of 118. how many neutrons does this atom have​

Answers

Answer:

39

Explanation:

Electrons weigh almost nothing, so their mass doesn't really matter for these types of problems. Just subtract 118-79 to find the remaining mass which is for the neutrons.

A solution that holds more solute than it normally can under the conditions at a given temperature is _____. supersaturated unsaturated saturated diluted

Answers

Answer:

Supersaturated !

Explanation:

based on the half-life of Tc-99, how many half-lives have to pass for a 150 mg sample of Tc-99 to decay down to 30mg?

Answers

Answer:

2.322 half-lives have passed to decay down from 150 miligrams to 30 miligrams.

Explanation:

The half of Technetium-99 is approximately 211000 years. The decay of isotopes is represented by the following ordinary differential equation:

[tex]\frac{dm}{dt} = -\frac{m}{\tau}[/tex] (Eq. 1)

Where:

[tex]\frac{dm}{dt}[/tex] - First derivative of isotope mass in time, measured in miligrams per year.

[tex]m[/tex] - Mass of the isotope, measured in miligrams.

[tex]\tau[/tex] - Time constant, measured in years.

Now we proceed to obtain the solution of this differential equation:

[tex]\frac{dm}{m} = -\frac{dt}{\tau}[/tex]

[tex]\int {\frac{dm}{m} } = -\frac{1}{\tau}\int dt[/tex]

[tex]\ln m = -\frac{t}{\tau}+C[/tex]

[tex]m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (Eq. 2)

Where:

[tex]m_{o}[/tex] - Initial mass of the isotope, measured in miligrams.

[tex]t[/tex] - Time, measured in years.

The time passed for isotope is cleared within the equation described above:

[tex]\ln \frac{m}{m_{o}} = -\frac{t}{\tau}[/tex]

[tex]t = -\tau \cdot \ln \frac{m}{m_{o}}[/tex]

In addition, we can obtain the time constant as a function of half-life:

[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (Eq. 3)

If we know that [tex]t_{1/2} = 211000\,yr[/tex], [tex]m_{o} = 150\,mg[/tex] and [tex]m = 30\,mg[/tex], then the time passed is:

[tex]\tau = \frac{211000\,yr}{\ln 2}[/tex]

[tex]\tau \approx 304408.654\,yr[/tex]

[tex]t = -(304408.654\,yr)\cdot \ln \left(\frac{30\,mg}{150\,mg} \right)[/tex]

[tex]t \approx 489926.829\,yr[/tex]

The amount of passed half-lives is that time divided by a half-life. That is:

[tex]n = \frac{489926.829\,yr}{211000\,yr}[/tex]

[tex]n = 2.322[/tex]

2.322 half-lives have passed to decay down from 150 miligrams to 30 miligrams.

Convert 5.4g of NaCl to moles

Answers

Answer:

.0924 moles of NaCl

Explanation:

So you know you have 5.4 g of NaCl and you need to know how many moles there are in this amount of NaCl

You'll need to find the atomic mass of the compound NaCl to help you solve for moles Sodium (Na) on the periodic table has a mass of 22.99 Chlorine (Cl) on the periodic table has a mass of 35.45

Add these two together----> 22.99 + 35.45 = 58.44

Now you can calculate for moles

Written-out method:

5.4 grams of NaCl  |   1 mole of  NaCl              

                                | 58.44 grams NaCl                = .0924 moles of NaCl

Plug into calculator method:

(5.4 g of NaCl/ 58.44g NaCl= .0925 moles)

Other Questions
Which represents a quadratic function?f(x) = -8x3 - 16x2 - 4xf(x) = 3/4 x2 + 2x - 5f(x) = 4/x2 - 2/x + 1f(x) = 0x2 - 9x + 7 What satement is true the about atomic mass? Write a short poem in english or spanish using a word for a color (at least 4 lines) At the start of the football game, there were 840 fans in the stadium. It began to rain during halftime, so 10% of the fans went home.During the 3rd quarter of the game, the visiting team scored five touchdowns, so 25% of the remaining fans went home.How many fans were in the stadium after the 3rd quarter? A truck requires 1 gallon of gas to cover a distance of 10 miles. How many gallons of gas will it take to cover 200 miles? How do you find the area of half a circle with a diamter of 6? Find the GCF of 6 and 15 using lists of factors. Why did the colonists call the Coercive Acts the "Intolerable Acts"?O A. Because the laws left the colonists no way to negotiate with KingGeorge.B. All of theseC. Because the laws came from ideas that colonial leaders gave toParliament.O D. Because they had no say in laws they were forced to obey. JK has endpoints at J(6,-1) and K(-3,-4). If M is the midpoint of JK, approximately what is JM ? A box contains 15 large marbles and 11 small marbles. Each marble is either green or white. 9 of the large marbles are green, and 3 of the small marbles are white. If a marble is randomly selected from the box, what is the probability that it is small or white? Express your answer as a fraction or a decimal number rounded to four decimal places. Why is Beowulf considered an epic hero? Which of Beowulf's character traits are considered heroic? Where are these traits shown in the epic and in the graphic novel? Guys it's my maths exam 9:00 wish me good luck Question 7 of 10A birthday cake was cut into equal pieces, and six pieces were eaten. Thefraction below shows how many pieces are left. According to the fraction,how many pieces were not eaten?oA. 3B. 15C. 6O D. 9 MRS. HALE. Dutys all right, but I guess that deputy sheriff that came out to make the fire might have got a little of this one. (Gives the roller towel a pull.) Wish Id thought of that sooner. Seems mean to talk about her for not having things slicked up when she had to come away in such a hurry. MRS. PETERS. (who has gone to a small table in the left rear corner of the room, and lifted one end of a towel that covers a pan). She had bread set. (Stands still.) How would an audio recording of this excerpt help establish the setting of the play? 4. Changer =to an equiv-1 + 2 sin ealent rectangular equation. During the early twentieth century, expansion started in many cities due to Wreh runs laps around a track every day after work. He runs at a constant rate and completes about 12 laps every 18 minutes.How many minutes does it take Wreh to run 30 laps?Solve this problem two different ways. Note: cross multiplication will only receive credit as one approach. how many solutions does a dependent system of equations have? How does the pacing of this passage affect the readers interpretation of the text?The quickening pace of the text gives the reader details that explain how Whymper provides contact between Animal Farm and the outside world.The quickening pace of the text allows the reader to gain insight into why Napoleon avoids contact with the outside world.The slowing pace of the text reveals that Napoleon is doing business with Mr. Pilkington and Mr. Frederick.The slowing pace of the text reveals details suggesting that even the rumors about Napoleon are probably propaganda. round 673738 to the nearest ten thousand