How many moles of aluminum are in this aluminum can? Answer: ____________ (25 pts) Calculate the number of aluminum atoms in this can. Answer: _______________ (25 pts) The Amount of Aluminum is 12.69g

Answers

Answer 1

Answer:a)No of moles of Aluminium=0.4703

b)number of aluminum atoms=2.832 x 10^23 atoms

Explanation:

a)Given that The Amount/ Mass of Aluminum is 12.69g

We know that

No of moles =Mass/ Molar mass

Molar mass of Aluminium, Al is 26.982 g/mol

No of moles =12.69g/26.982 g/mol

No of moles =0.4703

Also

b) 1  mole of aluminium must contain  6.022  x 10^23  atoms of aluminium  

which is  known as Avogadro's constant.

Therefore, 0.4703 moles will contain 0.4703 x  6.022  x 10^23  atoms =2.832 x 10^23 atoms


Related Questions

Explain how to convert a mass of compound A to a mass of compound D in words using the following reaction:

2A + 4B = C + 3D

You don't have to just give me the answer but if you can help me understand id appreciate it greatly

Answers

Answer:

1. Convert the mass of A to moles dividing in molar mass

2. Convert the moles of A to moles of D (2mol A = 3mol D)

3. Convert the moles of D to mass multiplying by its molar mass

Explanation:

As you can see in the equation, 2moles of A produce 3 moles of D, the equation is:

2mol A = 3mol D

But in the problem you are having the mass of A and you need the mass of D. That means you require to convert the mass of A to moles. With the moles of A you can find the moles of D and, as last, you need to convert the moles of A to mass.

To convert mass to moles or vice versa you must use Molar Mass. That means, the answer is:

1. Convert the mass of A to moles dividing in molar mass2. Convert the moles of A to moles of D (2mol A = 3mol D)3. Convert the moles of D to mass multiplying by its molar mass

How many atoms of oxygen are represented in 2Al 2 (CO 3 ) 3 ?

A. 3
B. 6
C. 9
D. 18

Answers

D. 18
In 2Al2(CO3)3 are 9 atoms, and 2 molecule of aluminum gives 18

Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.

Answers

Answer:

Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.

Explanation:

The balanced chemical equation of the reaction is:

[tex]4Al + 3 O_2 -> 2Al_2O_3[/tex]

Though there are 10 atoms of Al, only four atoms will react with every three molecules of oxygen.

Hence, right side the product formed is ---  Al2O3.

what is the molecular weight of a gas which diffuses 1/50 as fast as hydrogen​

Answers

the molecular weight of the gas is 5040 g/mol

303.8 liters volume will be occupied by 217.0 grams of methane gas at STP.

True

False

Answers

Answer:

False

Explanation:

It will occupy 271.7

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
(a) Water, air, wind
(b) Air, sugar, oil
(c) c Oxygen, water, sugar​

Answers

Answer:

A.

Explanation:

PO WATER,AIR,WIND

ANSWER FAST
What is the relationship between Ka and Kb with Kw?

(a) The sum of Ka and Kb equals the auto-dissociation constant for water.
(b) The product of Ka and Kb equals the auto-dissociation constant for water.
(c) The quotient of Ka and Kb equals the auto-dissociation constant for water.
(d)The difference of Ka and Kb equals the auto-dissociation constant for water.

Answers

The sum of Ka and Kb equals the auto-dissociation constant for water. The product of Ka and Kb equals the auto-dissociation constant for water.
I’m pretty sure it’s c

What is this picture an example of?

A. carbon cycle
B. nitrogen cycle
C. water cycle
D. ecological succession

PLEASE HELP

Sorry if the picture is bad Quality

Answers

Answer:

i think it is D

Explanation:

i dont know what you are learning but ecological succession is the change of enviroment pretty much.

Which of the following reactions would be the fastest?
A large lump of zinc with high concentration of sulfuric acid.
Small strips of zinc with high concentration of sulfuric acid.
Powdered zinc with low concentration of sulfuric acid.
Powdered zinc with high concentration of sulfuric acid.
2 DONT KNOW

Answers

Answer:

it should be powdered zinc with high concentration of sulfuric acid

what are examples of soluble salts (metal+acids)

Answers

Answer:

Chloride salts - made of HCI

Nitrate salts - made of HNO3

Sulfate salts - made of H2SO4

These are all the examples I could think of.

How many grams of FeCl3 are needed to make 1.5 L of a solution with a molarity of 0.450 M?

Answers

Moles=concentration x volume. 1.5/1000 multiply 0.450 = 6.75x10^-4
To find the mass of fecl3, we have the formula, mass=moles x molar mass. 6.75x10^-4 x (55.8+35.5 x 3). = 0.1096g

Not sure tho if i did it right

In a nonpolar covalent bond, electrons are
a. Located in a mobile "sea" shared by many ions
b. Transferred from one atom to another
c. Shared equally between two atoms
d. Shared UNequally between two atoms

Answers

Answer: c. Shared equally between two atoms

Electrons are shared equally because the atoms have the same electronegativity.

What is S for silicon tetrachloride, SiCl4

Answers

S denotes the ''number of shared electron pairs by an atom'', Hence, Silicon shares its 4 electrons with 4 Cl-atoms. Thus the Value of S is 4 in SiCl₄ .It is also known as covalency

What is Covalency ?

The number of covalent bonds that a particular atom can make with other atoms in forming a molecule.

Covalent bond id formed by the sharing of electron between two atoms.

Hence, Silicon shares its 4 electrons with 4 Cl-atoms. Thus the Value of S is 4 in SiCl₄ . It is also known as covalency

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median of 4, 6 ,9 helppp​

Answers

For the data set 1, 1, 2, 5, 6, 6, 9 the median is 5. For the data set 1, 1, 2, 6, 6, 9 the median is 4.

hope it helps you

Answer:

The median is 6, since it is the mid value of the set

Is soup pure or impure?

Answers

Answer:

I think it's impure . Hope this helps you

Answer:

I think is pure but not 100% pure.

Suppose I have enough ingredients to make 25 cookies, but when I go to bake them, I only get 5. What percent yield did I obtain?

Answers

Answer:

Explanation:

What is the "theoretical yield" of cookies from each of the "reactants?"

Theor. yield from eggs

=

12

eggs

×

24 cookies

1

egg

=

288 cookies

Theor. yield from vanilla

=

24

tsp vanilla

×

24 cookies

1

tsp vanilla

=

576 cookies

Theor. yield from salt

=

82

tsp salt

×

24 cookies

0.5

tsp salt

=

3936 cookies

Theor. yield from baking soda

=

84

tsp baking soda

×

24 cookies

0.5

tsp baking soda

=

4032 cookies

Theor. yield from chocolate chips

=

3

cups chocolate chips

×

24 cookies

1.333

cups chocolate chips

=

54 cookies

Theor. yield from sugar

=

11

cups sugar

×

24 cookies

0.5

cup sugar

=

528 cookies

Theor. yield from brown sugar

=

4

cups brown sugar

×

24 cookies

0.5

cup brown sugar

=

192 cookies

Finally, "we leave it as an exercise for the student" to calculate that

Theor. yield from margarine = 72 cookies

 

b. Identify the limiting reactant

The limiting reactant is the amount of chocolate chips because they can produce the smallest amount of cookies.

c. Determine the theoretical yield

The theoretical yield is 54 cookies, because that is all you can get from the chocolate chips provided.

The percent yield obtained on baking the cookies is 20 % and the theoretical yield is 25 cookies.

What is percent yield?

Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.

In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .

As cookies obtained is 5 it is observed yield while 25 is theoretical yield so the percent yield, 5/25×100=20%.

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2.7 x 10^25 molecules of MnO equals how many moles?

Answers

Answer:

27 and 24 zeroes following it

Explanation:

10^25 is 100...(continues for 25 zeroes)

Now we multiply it by 2.7, making it 24 zeroes afterwards.

Avogadro's numbers are used to calculate the number of moles from molecules. There are 44.8 moles in MnO.

What are molecules?

Molecules are the unit of the compound that may have the same or different atoms in it. The number of molecules is used to calculate moles from Avogadro's number.

By Avogadros number 1 mole of substance = 6.02 x 10²³ molecules

So, 2.7 x 10²⁵ molecules will have moles:

(2.7 x 10²⁵ molecules × 1 mole) ÷ (6.02 x 10²³ molecules) = 0.448 × 10² moles

Therefore, there are 44.8 moles of MnO.

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An electric kettle draws a current of 6.50 A while it is plugged into a 120-V
electrical outlet. What power does the kettle use?

Answers

Answer:

780 watts

Explanation:

formula to find power when given amps and voltage

P = A x V

=6.50a x 120V

= 780 W (watts)

1. The electronic configuration of chlorine is
1. 2,7
II. 2,8,8,7
III. 2,8,7
IV. 2,7,8

Answers

Answer:

Chlorine has atomic number 17. Its electronic configuration is 2, 8, 7. It is the second-lightest of the halogens, it appears between fluorine and bromine in the periodic table.

Answer:

III

Explanation:

From the periodic table, Chlorine(Cl) has 17 protons.

And when arranging the proton of elements each shell has a number protons it can take, i.e

2,8,8,8..........

The first shell can only take a maximum of 2 protons while the second shell upwards takes a maximum of 8 protons

Now we want to arrange Chlorine;

1st shell = 2

2nd shell = 8

2 + 8 = 10

17(no. of Chlorine protons) - 10

= 7

therefore,

3rd shell = 7

Therefore,

The electronic configuration of chlorine is

2,8,7

What can a nation do to improve the exchange rate of its currency?

A.
try to improve its balance of trade
B.
try to decrease its trade surplus
C.
try to lower its gross domestic product (GDP)
D.
try to export less while importing more

Answers

Answer:

A

Explanation:

balance the trades and improving them

Answer:

A:try to improve it's balance of trade

Explanation:

Calcule el peso de cromato sodico, Na2CrO4, necesario para preparar 200g de una disolución al 20% de Na2CrO4

Answers

Answer:

40g de cromato sódico serán necesarios

Explanation:

Una solución 20% de Na2CrO4 contiene 20g de Na2CrO4 por cada 100g de solución (Esto es, soluto + solvente). Para preparar 200g de la disolución en mención serán necesarios:

200g solucion * (20g Na2CrO4 / 100g Solución) =

40g de cromato sódico serán necesarios

The diagram shows the basis for forming which of the following?
O nucleic acids
O proteins
O polysaccharides
O lipids

Answers

the answer is prolly A or B

Which of these is an example of a prosthesis?
A. A hearing aid
B. A textbook
C. Gloves
D. A pair of boots

Answers

Answer:

hearing aid

Explanation:

an artificial body part

A hearing aid is an example of a prosthesis. Therefore, option A is correct.

A prosthesis is an artificial device or replacement for a missing body part or function. In the case of a hearing aid, it is a device designed to assist people with hearing loss by amplifying sound. It acts as a substitute for the natural function of the ear.

A textbook is a written educational resource, gloves are protective coverings for the hands, and a pair of boots is footwear. These items do not serve as artificial replacements for missing body parts or functions.

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If the half life of iridium-182 is 15 years, how much of a 3 gram sample is left after 2 half-lives?
A) .57 grams
B) .70 grams
C) 2.25 grams
D) .75 grams

Answers

Answer:

D. 0.75 grams

Explanation:

The data given on the iridium 182 are;

The half life of the iridium 182, [tex]t_{(1/2)}[/tex] = 15 years

The mass of the sample of iridium, N₀ = 3 grams

The amount left, N(t) after two half lives is given as follows;

[tex]N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}} }[/tex]

For two half lives, t = 2 × [tex]t_{(1/2)}[/tex]

∴ t = 2 × 15 = 30

[tex]\dfrac{t}{t_{(1/2)}} = \dfrac{30}{15} = 2[/tex]

[tex]\therefore N(t) = 3 \times\left (\dfrac{1}{2} \right )^2 = 0.75[/tex]

∴ The amount left, N(t) = 0.75 grams

Which statement best describes the diagram

Answers

Explanation:

the answer will be A

The catalyst cannot be at point A since that's the reactant

Pathway B requires more energy, which makes it slower and harder for the reaction to finish

point D is the product

I believe the answer is a

What type of structure are ionic lattices?
Big structures
Small structures
Tiny structures
Giant structures

Answers

Answer:

Giant structures

Explanation:

An ionic compound is a giant structure of ions. The ions have a regular, repeating arrangement called an ionic lattice . The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.

Giant hope this helps

Which kind of energy is stored in the chemical bonds of molecules found in
wood?
A. Mechanical energy
B. Potential energy
C. Gravitational energy
D. Kinetic energy

Answers

Answer:

B. Potential energy

Explanation:

It's not mechanical energy, because it is not doing work

It's not kinetic energy because it;s not moving

It's not gravitational energy because it is not above the ground

It is potential energy because it is stored energy

B. Potential Energy

125 cm3 of a solution contains 0.25 moles of the solute. What is the concentration of the solution?

Answers

Answer:

Explanation:

125 cm3 -> 0.125 L

M = no. mole / volume (L)

M = 0.25 / 0.125 = 2 M

PLEASE HELP!!!!!!
The average number of drops of NaHCO3 in the titration lab was 142. Calculate the number of moles of NaCHO3 that were required to neutralize the CH3COOH in the vinegar.
- 1 mole of acetic acid was required for 2 moles of sodium bicarbonate
- 1 mole of acetic acid was required for 1 mole of sodium bicarbonate
- 2 mole of acetic acid was required for 1 mole of sodium bicarbonate
- 1 mole of acetic acid was required for 3 mole of sodium bicarbonate

Answers

Answer: The correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

Explanation:

We are given:

Average number of drops of sodium bicarbonate = 142

The chemical equation for the reaction of sodium bicarbonate and acetic acid in vinegar follows:

[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2CO_3[/tex]

From the stoichiometry of the reaction:

1 mole of sodium carbonate reacts with 1 mole of acetic acid in vinegar.

Hence, the correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

When the pH of a solution is changed from 4 to 3, the hydronium ion concentration of the
solution
A)
increases by a factor of 10
B)
decreases by a factor of 100
C)
increases by a factor of 100
D)
decreases by a factor of 10

Answers

Answer:increases by a factor of 10

Explanation: the concentration of the solution changed from 4 to 3

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