Find the number of moles if you have 1.2 x 1048 copper atoms.

Answers

Answer 1

Answer:

1.993 × 10^(24) moles

Explanation:

From avogadro's number, we have that;

1 mole of atoms contain 6.022 × 10^(23) atoms

Therefore, 1.2 x 10^(48) atoms of copper will contain;

(1.2 x 10^(48) × 1)/(6.022 × 10^(23)) = 1.993 × 10^(24) moles


Related Questions

WHICH OF THE FOUR COMPOUNDS HAS BONDS WITH THE GREATEST DEGREE OF POLARITY (MOST POLAR)?

Answers

Answer:

I NEED TO KNOW THIS TOO

Explanation:

IVE BEEN LOOKING FOR THE ANSWER

9. How long will it take 120 grams of Strontium-90 to decay to 7.5 grams?
with steps pls​

Answers

Answer:

116 years

Explanation:

To solve this, we will use the half life equation;

A(t) = A_o(½)^(t/t_½)

Where;

A(t) is the amount of strontium left after t years;

A_o is the initial quantity of strontium that will undergo decay;

t_½ is the half-life of strontium

t is the time it will take to decay

We are given;

A(t) = 7.5 g

A_o = 120 g

From online values, half life of strontium-90 is 29 years. Thus, t_½ = 29

Thus;

7.5 = 120 × ½^(t/29)

Divide both sides by 120 to get;

7.5/120 = ½^(t/29)

0.0625 = ½^(t/29)

In 0.0625 = (t/29) In ½

-2.772589 = (t/29) × (-0.693147)

(t/29) = -2.772589/(-0.693147)

t/29 = 4

t = 29 × 4

t = 116 years

Explain in a short sentence how you can tell a reaction is a decomposition reaction.

Answers

Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.

Mark me as brainilist pls

You have a stock solution of HNO3 with a concentration of 4.5 x 10^-4 M. However, you need 275 ml of a 2.50 x 10^-5 M solution. How much of the stock solution will you need?

Answers

Answer:

15.28 mL

Explanation:

From the question given above, the following data were obtained:

Molarity of stock solution (M₁) = 4.5x10¯⁴ M

Volume of diluted solution (V₂) = 275 mL

Molarity of diluted solution (M₂) = 2.5×10¯⁵ M

Volume of stock solution (V₁) needed =.?

The volume of the stock solution needed can be obtained by using the dilution formula as illustrated below:

M₁V₁ = M₂V₂

4.5x10¯⁴ × V₁ = 2.5×10¯⁵ × 275

4.5x10¯⁴ × V₁ = 0.006875

Divide both side by 4.5x10¯⁴

V₁ = 0.006875 / 4.5x10¯⁴

V₁ = 15.28 mL

Therefore, the volume of the stock solution needed is 15.28 mL

Why does forming bonds release energy? *

Answers

Bonds are stable configurations of (relative) minimal energy. So when entering a bond the combined energy level of the contributing atoms is being reduced to a local minimum. That way “free energy” is released that shows as heat or radiation (e.g.) in the environment.


Please select the word from the list that best fits the definition.

Science lab, bring water and sodium

a) term calendar

b) weekly schedule

c) daily organizer

Answers

Answer:

C. Daily Organizer. Also called an agenda. We usually write notes in them for school related things so the answer is pretty self explanatory.

Yep C we did this before in class

Hope it helps —-xoxo

Do your answers to the previous questions satisfy
the following statements?
A) The dependent variable is changed by the
independent variable.
B) The independent variable causes a change
to another variable.
C) The independent variable is not changed by
another variable.

Answers

Answer:

I put B&C

Explanation:

"You learned about mixtures, especially solutions and the factors that affect their makeup and properties. Why is it important to know the properties of both solutes and solvents when preparing a solution that is expected to meet a certain need?
Does this involve a chemical change or a physical change? Explain."

Can u pls help me

Answers

Answer:

its due to the solvents being factored. to be prepared for the solution you would need a chemical change as the solvents get factored so this will mean that it will have a chemical reaction. in this case its slightly different so it will be called a chemical change as 2 different chemicals change and evolve.

Explanation:

How can mutations occur in cells? Submi Save and Exit Next Mark this and return​

Answers

by rounding them to the neerest 10

The photo shows wires made of pure copper, an element
What would the smallest piece of copper be?
A. Copper atom
B. Mixture of different kinds of metallic elements
C. Copper molecule
D. Compound containing two or more elements

Answers

Answer:

B

Explanation:

I hope its right. I'm pretty sure.

Answer:

Explanation:

Copper Atom

do pressure and temputer remain consant in earth interior

Answers

Answer:

no

Explanation:

what water has 97% of water

Answers

Answer:

ocean

Explanation:

because its easy

The answer would be Ocean

Someone please answer this...

Answers

Answer:

5446.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (M) = 50 g

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Specific heat capacity (C) = 0.89 J/gºC

Heat (Q) required =?

Next, we shall determine the change in the temperature. This can be obtained as follow:

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 192.4 – 70

ΔT = 122.4 °C

Finally, we shall determine the heat required to heat up the block of aluminum as follow:

Mass (M) = 50 g

Specific heat capacity (C) = 0.89 J/gºC

Change in temperature (ΔT) = 122.4 °C

Heat (Q) required =?

Q = MCΔT

Q = 50 × 0.89 × 122.4

Q = 5446.8 J

Thus, the heat required to heat up the block of aluminum is 5446.8 J

What is the percent composition of Phosphorus in Li3PO3

Answers

Answer:

you will get 17.983 g of lithium for every 100 g of lithium phosphate.

Explanation:

69.7%  is the percent by mass of Lithium in  Li[tex]_3[/tex]PO[tex]_3[/tex]. A percent is obtained by multiplying the result by 100.

One approach to show the concentration for an element within a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total weight of the combination by the mass of each component and multiplying the result by 100%. The mass percent is calculated by dividing the mass that contains the compound and solute by the mass for the element or solute.

99.795g/mol = molar mass of  Li[tex]_3[/tex]PO[tex]_3[/tex]

6.94g/mol = molar mass of Li

mass percentage of Li=(molar mass of Li/molar mass of Li[tex]_3[/tex]PO[tex]_3[/tex])×  100

=(6.94/99.7)×  100

=69.7%

To know more about mass percentage, here:

brainly.com/question/32197511

#SPJ6

Newton's first law of motion explains how
affects an object's motion. According to
Newton's first law, an obiect at rest will stay at

Answers

Answer:

rest until and unless an external force is applied.


Which of the following compounds is least soluble in water?
1) Copper (II) Chloride
2) Aluminum Acetate
3) Iron (III) hydroxide
4) Potassium Sulfate

Answers

Answer:

3) iron (iii) hydroxide

Explanation:

Give answer fast (C)
☹️☹️☹️☹️☹️☹️​

Answers

Plug in the numbers
(-3)^3 + (-3)^2 + -3 + 5
-27 + 9 - 3 + 5
-18 - 3 + 5
= -16
The answer is -16 for C

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.
This method of energy transfer is —

Answers

Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

How is the rock in the deep mantle similar to the rock in the parts of the mantle nearest the surface? How is it different?

Answers

Answer:

Similarity: Rocks within the mantle contain more magnesium and iron than the ones in the crust.

Difference: Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly. On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

Explanation:

Rocks within the mantle contain more magnesium and iron than the ones in the crust.

What is Rocks?

Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly.

On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

According to geologists, a rock is a naturally occurring material made up of crystalline crystals of various minerals that have fused together to form a solid mass.

Therefore, Rocks within the mantle contain more magnesium and iron than the ones in the crust.

To learn more about rocks, refer to the link:

https://brainly.com/question/19930528

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3. What is the best description of an ionic bond?
A. electrostatic force of attraction between positive and negative ions
B. electrostatic force of repulsion between ions of the same charge
C. nuclear force of attraction between protons of different atoms
D. nuclear force of repulsion between protons of different atoms

Answers

I think B may be the answer sorry if I'm wrong

What is the charge of the nucleus ? Why ?

Answers

Answer:

A nucleus is a positive charge

Explanation:

A nucleus is made up of protons and neutrons. Protons have a positive charge and neutrons have a neutral charge.

what is the charge on a calcium (Ca) atom that contains 18e?

Answers

Answer:

Ca2+

Explanation:

the charge on a calcium (Ca) atom that contains 18e is 2+

What is the density of an object with a mass of 125 g and a volume of 150 mL ?

Answers

Answer:

13

Explanation:

234567877

Any two difference between short sightedness and long sightednes​

Answers

Explanation:

tala it is also called myopia lekhnu hai

Äni Arko MA it is also called hypermetropia .

Why Do Some Things Stop While Others Keep Going?

Answers

Answer:because they run out of energy when it is transferred and to other objects, or their kinetic energy

Explanation:

Because some get tired and the other one no

Give two limitations of law of Constant Composition​

Answers

Answer:

1.The law does not hold true if the different isotopes of the element are involved in making chemical compound.

2.The law is not applicable when elements combine in the same ratio but different compounds are formed.

In which highlighted section of the periodic table in the diagram provided above are the elements whose atoms have 1 valence electron located?

A) a
B) b
C) c
D) d

Answers

Answer:

B.

Explanation:

what is tetra atomic molecules?

Answers

Answer:

Explanation:

They are the molecules that are formed when four atoms chemically bond together.

An tetra atomic molecule is a 1 : consisting of four atoms : having four atoms in the molecule. 2 : having four replaceable atoms or radicals.

How many hydrogen atoms Is needed for C4H8 to become saturated

Answers

Answer:

2 atoms

Explanation:

Because it contain one double bond

what is the temperature in the fahrenheit?

Answers

A or c but I think it’s a.
The correct answer would be a
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