Chemistry, 28.03.2020 23:29 SoccerHalo

To gain an idea as to how many atoms are in a gram or so of copper, use the larger balance
on the right. Press Add atoms to put a scoop of atoms in the weighing dish, and keep
adding until the balance registers between 1 and 2 grams. If you don't seem to be making
much progress, adjust the exponent using the slider, which will make the scoop size bigger.
How many atoms did you need to add?

Answers: 2

Show answers

Answers

Mole is unit that is used to measure the smaller particles such as ions, atoms and molecules. There are $\bold {1.89 x 10^2^2 }$ atoms are present in the 2 g of Copper.

Mole:

Mole is unit that is used to measure the smaller particles such as ions, atoms and molecules. One mole is equal to the Avogadro's constant.

One moles of atoms are present in the 12 g of C-12.1 mole = $\bold {6.02 x 10^2^3}$ molecules

The formula foe number of mole,

$\bold {n = \dfrac {w}{m}}$

Where,

n - number of moles = 0.03 mole

w - mass of molecule

m - molar mass of the copper = 63.54 g/mol

The number of atoms in the 0.03 moles.

$\bold {\bold =0.03 \times {6.02 x 10^2^3} }\\\\\bold {= 1.89 x 10^2^2 }$

Therefore, there are $\bold {1.89 x 10^2^2 }$ atoms are present in the 2 g of Copper.

To know more about moles, refer to the link:

link

Answer from: naomi9601

Explanation:

To solve this problem, we must understand the relationship between mass of a substance and the number of atoms.

Atoms are the smallest indivisible particles of any matter. A substance can be made up of several number of atoms in their space.

The mass of any substance is a function of the amount of atoms its contains.

The mass of a substance is related in chemistry to the amount of atoms its contains using the parameter called the number of moles.

A mole is the amount of substance that contains the Avogadro's number of particles. This number is 6.02 x 10²³ particles. The particles here can be protons, neutrons, electrons, atoms e.t.c.

Now,

Number of moles = $\frac{mass}{molar mass}$

Molar mass of copper = 63.6g/mole

Number of moles = $\frac{2}{63.6}$ = 0.03mole

Since 1 mole of a substance contains 6.02 x 10²³atoms

0.03 mole of copper will contain 0.03 x 6.02 x 10²³atoms

= 1.89 x 10²² atoms

He needs to add 1.89 x 10²² atoms to make 2g of the sample.

Answer from: Quest

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.

Answer from: Quest

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.

Another question on Chemistry

Chemistry, 21.06.2019 19:10

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Answers: 2

Answer

Chemistry, 22.06.2019 00:20

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

Answers: 2

Answer

Chemistry, 22.06.2019 05:50

What are transitions between a liquid and a solid called? identify which way they are transitioning

Answers: 2

Answer

Chemistry, 22.06.2019 12:30

Avariable that is not being directly tested during an experiment should be

Answers: 1

Answer

You know the right answer?

To gain an idea as to how many atoms are in a gram or so of copper, use the larger balance
on...