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I am changing something from grams to moles using Avogadro's number. When i put it into the calculator, I get the wrong answer. I have set up the problem correctly and I have an answer key. Do i need to...


Why not tell us what you are trying to do?.
n= number of moles
m= mass in g.
M= atomic or molar mass (in g/mol)
n=m/M (in mol)
To enter Avogadro's number you use the EE (*10^x) or Exp
6.02 [EE]23 No 10 should appear.
To calculate the atomic/molar mass use the Periodic table.

Oct 30, 2013 | Texas Instruments TI 30XIIS Scientific...

1 Answer

I need to calculate how many atoms of gold are in a pure gold ring with a mass of 10.6g


Relative atomic mass of gold M(Au)= 196,96. To find the numbers of mols in the gold ring with mass m=10,6 g you have to simply calculate n=m/M and after that to multiply n with Avogadro's constant Na=6.022exp23. Final result is 3.24exp22 atoms. See captured image


10_5_2012_9_06_50_pm.jpg

Oct 04, 2012 | Texas Instruments TI-83 Plus Calculator

1 Answer

How many grams of aluminum acetate contain 2.24 x 1022 atoms of hydrogen?


1 Look up the formula for the aluminum acetate.
2 Count the number of Hydrogen atoms per molecule: Call that nH.
3 Dividing 2.24*10^22 by nH you get the number of molecules of acetate.
4. Divide that number by Avogadro's Number to obtain the number of moles required.
5. Multiply the number of moles by the molecular mass of the aluminum acetate (look it up or use the periodic table to calculate it), you will get the mass of aluminum acetate that contains 2.24*10^22 hydrogen atoms.

Sep 14, 2011 | Texas Instruments TI-84 Plus Calculator

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What is matter?


Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size.
The most familiar examples of material particles are the electron, the proton and the neutron. Combinations of these particles form atoms. There are more than 100 different kinds of atoms, each kind constituting a unique chemical element. A combination of atoms forms a molecule. Atoms and/or molecules can join together to form a compound.
Matter can exist in several states, also called phases. The three most common states are known as solid, liquid and gas. A single element or compound of matter might exist in more than one of the three states, depending on the temperature and pressure. Less familiar states of matter include plasma, foam and Bose-Einstein condensate. These states occur under special conditions.
Different kinds of matter can combine to form substances that may not resemble any of the original ingredients. For example, hydrogen (a gaseous element) and oxygen (another gaseous element) combine to form water (a liquid compound at room temperature). The process of such combination is called a chemical reaction. A chemical reaction involves interactions between the electrons of the atoms, but does not affect the nuclei of the atoms.


I hope you find it very helpful. Best regards.

Aug 16, 2011 | Apple QuickTime VR Authoring Studio 1.0

1 Answer

Find the weight of two iron atoms


Dear Mohadsaad,
Do you want to calculate Atomic Mass? Let me know

Jan 26, 2011 | BenQ Joybook 3000-01 Notebook

1 Answer

When was the atom discovered?


In the 5th cent. B.C. the Greek philosophers Democritus and Leucippus proposed that matter was made up of tiny, indivisible particles they called atom, or in Greek "a-tomos". John Dalton was the first who introduced the idea of atom. Atom, the very word, means inseparable or indivisible. Based on that idea in chemistry many laws have been stated such as, law of coservation of mass, law of multiple proportions etc



Jan 20, 2011 | Toys

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Brief explanation the diffrence between file oriented system and database oriented system.what do you mean atomicity? draw a diagram of the database system architecture.?


It is difficult to ensure atomicity in file processing system than database oriented system.
In file system, for example, transferring $20 from Person1 to Person2 account and between that process something went wrong there is no guarantee that the transfer was successful or not. While in a database system a guarantee of atomicity prevents updates to the database occurring only partially.


Atomicity database systems

Dec 16, 2010 | Computer Associates Unicenter SQL-Station...

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I need to know what a nucleus is


The nucleus is the very dense region consisting of nucleons (protons and neutrons) at the center of an atom. Almost all of the mass in an atom is made up from the protons and neutrons in the nucleus, with a very small contribution from the orbiting electrons.



for more info on atoms click here

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Oct 07, 2009 | The Learning Company Achieve! Math &...

1 Answer

How many atoms are present?


(0.540 g)(6.02 1023 atoms) 27.0 g 1.20 1022 atoms

Because density equals mass per unit volume, the mass of the cube is m V (2.70 g/cm3)(0.200 cm3) 0.540 g write this relationship twice, once for the actual sample of aluminum in the problem and once for a 27.0-g sample, and then we divide the first equation by the second: m sample m 27.0 g kN sample kN27.0 g

m sample m 27.0 g

Nsample N27.0 g

To solve this problem, we will set up a ratio based on the fact that the mass of a sample of material is proportional to the number of atoms contained in the sample. This technique of solving by ratios is very powerful and should be studied and understood so that it can be applied in future problem solving. Let us express our proportionality as m kN, where m is the mass of the sample, N is the number of atoms in the sample, and k is an unknown proportionality constant. We

Notice that the unknown proportionality constant k cancels, so we do not need to know its value. We now substitute the values: 0.540 g 27.0 g Nsample 6.02 N sample 1023 atoms

Jan 21, 2009 | Acer TravelMate 2300 Notebook

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