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How do you get the mass number of an atom?
Look on the Periodic Table. The bottim number is the Atomic Mass and the top is the atomic number. ex. The atomic mass for O (oxygen) is 16.
What is the mass number of an isotope o this atom that has has 2neutrons?
The mass number of an isotope is the sum of its protons and neutrons. If the atom has 2 neutrons, you would need to know the number of protons (which defines the element) to calculate the mass number. For example, if the atom has 6 protons (like carbon), the mass number would be 6 protons + 2 neutrons = 8. Therefore, the mass number of this isotope would be 8.
What is the atomic mass of o?
The atomic mass of oxygen (O) is approximately 16 atomic mass units.
How many moles Fe are in a sample of Fe2O3 that contains 100g O?
To find the number of moles of Fe in Fe2O3, first calculate the molar mass of Fe2O3 and O. Then, determine the number of moles of O in the sample. Finally, you can use the stoichiometry of Fe2O3 to find the moles of Fe present. Alternatively, if you know the molar mass of just Fe, you can calculate the moles of Fe by dividing the mass of Fe in the sample by its molar mass.
Is 18 O an isotope?
Yes, 18O is an isotope of oxygen. It has a different number of neutrons compared to the more common isotope of oxygen (16O), which affects its atomic mass.
How do you get the mass number of an atom?
Look on the Periodic Table. The bottim number is the Atomic Mass and the top is the atomic number. ex. The atomic mass for O (oxygen) is 16.
What is the name of this atomic number 8 and mass number 16?
This element is oxygen (O).
How many moles of o are in 8.25g of o?
0.515 moles
The mass number of an element is the number of?
Mass number is the atomic mass of a particular isotope (apex chem 5.3)
Which is usually the larger number the mass number of an element or the formula mass of a compound that contains the element?
The formula mass of a compound that contains the element would be a larger number than the mass number of the individual element. The individual element would simply be the mass of just that one atom, where as the compound would be the mass of that atom plus the other masses of the other atoms that make up the compound. ex. Oxygen-O has a mass number of about 16 grams. Water-H2O has a formula mass of 2 x mass of Hydrogen-H (about 1) + the mass of Oxygen-O 16 = 18 grams. A formula mass of 18 g is more than a mass number of 16 g.
What is the atomic mass of o?
The atomic mass of oxygen (O) is approximately 16 atomic mass units.
How many moles Fe are in a sample of Fe2O3 that contains 100g O?
To find the number of moles of Fe in Fe2O3, first calculate the molar mass of Fe2O3 and O. Then, determine the number of moles of O in the sample. Finally, you can use the stoichiometry of Fe2O3 to find the moles of Fe present. Alternatively, if you know the molar mass of just Fe, you can calculate the moles of Fe by dividing the mass of Fe in the sample by its molar mass.
How do you work out the number of moles of unknown compound if you are only given the molar mass?
To find the number of moles from molar mass, divide the mass of the compound by its molar mass. The formula is: Moles = Mass (g) / Molar Mass (g/mol). This will give you the number of moles of the unknown compound.
What is the mass of 0.7891 mol of ferric oxide (Fe2O3)?
Atomic Mass of Fe: 55.8g/mol Atomic mass of O: 16g/mol Molecular mass of Fe2O3: 2(55.8)+3(16) = 159.6g/mol mass = Molecular mass x number of moles mass = 159.6g/mol x 0.7891mol = 125.94g
What is the mass number of sodium hydroxide?
Actually massnumbers are only given to (isotopes) of elements.If you want to know the molecular mass, molar mass one should add up all atomic masses (not the same as 'mass numbers') of that molecule:Na=22.98977, O=16.00, H=1.008, so the molar mass of NaOHis 39.998 = 40.00 g/mol.(Note that atomic masses are not exact, but rounded numbers, while mass numbers are exact quantities (whole numbers): Na=23, O=16, 17, 18 and H=1)
What is the atomic symbol and atomic mass of oxygen?
The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16. The atomic weight of oxygen (not atomic mass) is [15,99903; 15,99977] after the IUPAC Tables - 2009. The atomic number of oxygen is 8. The chemical symbol is O.
Is 18 O an isotope?
Yes, 18O is an isotope of oxygen. It has a different number of neutrons compared to the more common isotope of oxygen (16O), which affects its atomic mass.
