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How do you find the mass of a sample of 1.72 x 1023 atoms of potassium?
Wiki User
∙ 12y ago
1 mole K atoms = 39.0983g K (atomic weight in grams)
1 mole K atoms = 6.022 x 1023 atoms K (Avogadro's number)
Convert known atoms to moles.
1.72 x 1023 atoms K x (1mol K/6.022 x 1023 atoms K) = 0.286mol K
Convert moles to mass in grams.
0.286mol K x (39.0983g K/1mol K) = 11.2g K
Wiki User
∙ 12y ago
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How do you find the number of atoms in 6.21 mol of Mg?
No of atoms = no of moles x Avogadro's no = 6.21 x 6.023 x 1023
Where to find potassium chlorate?
Potassium is an element, so what makes up potassium is potassium atoms.
How many atoms in c2h5no2?
Did you mean 2 x 10 to the power 23? if so it should be typed as 2 x 10 ^ 23 The trinitro toluene, (T.N.T) C7H5(NO2)3 sample will have; 2 x 1023 x 7 for the Carbon atoms, plus; 2 x 1023 x 5 for the hdrogen atoms, plus; 2 x 1023 x 3 for the nitogen atoms, plus; 2 x 1023 x 2 x 3 for the oxygen. you just need to add together the individual totals to find your answer.
How many atoms are there in one gram of hydrogen?
It depends on the atomic mass of a substance. To find out, divide the 1 by the atomic mass of the element (found on the periodic table), then multiply by 6.02*1023. Ag=(1/Am)*6.02*1023 Where Am=atomic mass of the element, and Ag=the number of atoms in a gram.
How many atoms of sodium are there in 11.2 grams of sodium chloride?
This problem requires the atomic masses of each element involved. Then add them together to get the total molecular mass. If you take sodium's weight and divide it by the total mass, then you should have the percent of sodium in sodium chloride. Na- 23.0 Cl- 35.5 NaCl- 58.5 grams 23.0 / 58.5 × 100= 39.3% Na in NaCl Now we need to find the total number of atoms in the whole compound. Take the grams and convert it to atoms using Avogadro's constant. 11.2 g Na × (6.02 × 1023 atoms) / (23.0 g) Na = 2.93 × 1023 atoms If that is the total mass, then we know that 39.3% of it has to be sodium 39.3% of (2.93 × 1023)= 1.15 × 1023 atoms Na
How many atoms are in the compound KCI?
two elements and two atoms (potassium and chlorine)In one molecule of KCl, there are two elements (potassium and chlorine).The molecular weight of KCl is 74.55 g / mol.So, 74.55 g of KCl will contain 6.023 x 1023 molecules or 12.046 x 1023 atoms.
Unit of atomic mass?
To convert mass to atoms:Find the atomic mass of the element in the substance. You can find atomic masses on the periodic table. Ex. Lithium's atomic mass is 6.9 grams (round if you need to)Then find the mass of the substance in grams. Ex. you have 18.2 grams of a sample of Lithium.The mass of the sample is multiplied by 6.02 * 1023 and divided by the atomic mass.Ex.mass of sample in grams * (6.02 * 1023 atoms) / (atomic mass) = # atoms in grams18.2 grams * (6.02 * 1023 atoms) / (6.9 grams) = 1.59* 1024 atomsThe number 6.02 * 1023 is Avogadro's Constant which is the amount of atoms (or molecules) in one mole.
How do you find the number of atoms in 6.21 mol of Mg?
No of atoms = no of moles x Avogadro's no = 6.21 x 6.023 x 1023
How do you find mole in atom?
1 mole has 6,022 141 29(27)×1023 atoms.
How do you find the mass of an atom with only the molar mass given?
Molar mass of an element is the atomic weight on the periodic table in grams. 1 mole of atoms of an element is 6.022 x 1023 atoms. To find the mass of one atom of an element, divide the element's molar mass by 6.022 x 1023 atoms.Example:Sodium, Na, has a molar mass of 22.989770g/mol (atomic weight in grams)1 mole Na atoms = 6.022 x 1023 atomsSolution:22.989770g/mol x 1mol/6.022 x 1023 atoms = 3.818 x 10-23g/atom
Which has the greatest number of atoms- 45 grams of Mg 45 grams of F 45 grams of P or 45 grams of Na?
In order to figure out how many atoms are in each sample, you would take 45, multiply it by 6.02 × 1023, and divided by the atomic mass. Since two of the numbers (45 and 6.02 × 1023) will be constants in all of the samples, the number of atoms will differ in each sample due to the atomic mass. 45 × (6.02 × 1023) / atomic mass in grams = number of atoms You could punch out all the numbers to see which sample has the greatest number of atoms, but it is easier to find the atomic mass for all of them and see which one is smaller. A larger atomic mass will mean the equation will be divided by a larger number, meaning the number of atoms will be smaller. So the smallest atomic mass would yield more atoms.Atomic masses:Mg- 24.3 grams***F- 38.0 gramsP- 31.0 gramsNa- 23.0 grams***Note that fluorine is a diatomic moleculeThe sample of 45 g of sodium (Na) would contain the greatest number of atoms
How many electrons are present in 4g methane?
Let us get number atoms of the constituent first.4 grams CH4 (1 mole CH4/16.042 grams)(6.022 X 1023/1 mole CH4)= 1.5 X 1023 atoms of methane========================so,Carbon is one to one in the molecular formula, so let's get the number of hydrogen atoms in this mass methane.1.5 X 1023 atoms CH4 (4 mole H/1 mole CH4)= 6 X 1023 atoms hydrogen======================now, we proceed to find electrons1.5 X 1023 atoms carbon * 6 electrons= 9 X 1023 electrons carbon--------------------------------------6 X 1023 atoms hydrogen * 1 electron= 6 X 1023 electrons hydrogen--------------------------------------------added together= 1.5 X 1024 electrons in 4 grams methane-------------------------------------------------------------( call it 2 X 1024 electrons methane to be in line with significant figures )
Where to find potassium chlorate?
Potassium is an element, so what makes up potassium is potassium atoms.
How many atoms in c2h5no2?
Did you mean 2 x 10 to the power 23? if so it should be typed as 2 x 10 ^ 23 The trinitro toluene, (T.N.T) C7H5(NO2)3 sample will have; 2 x 1023 x 7 for the Carbon atoms, plus; 2 x 1023 x 5 for the hdrogen atoms, plus; 2 x 1023 x 3 for the nitogen atoms, plus; 2 x 1023 x 2 x 3 for the oxygen. you just need to add together the individual totals to find your answer.
WHAT ARE THE ELEMENTS AND THE NUMBER OF ATOMS IN KCI?
Potassium chloride I'm not sure how many atoms though. I'm trying to find it myself.
How many atoms are there in one gram of hydrogen?
It depends on the atomic mass of a substance. To find out, divide the 1 by the atomic mass of the element (found on the periodic table), then multiply by 6.02*1023. Ag=(1/Am)*6.02*1023 Where Am=atomic mass of the element, and Ag=the number of atoms in a gram.
How many atoms is in 2.3 moles of gallium?
How many atoms of gallium are in 2.85 x 103 g of gallium?
