Chlorine-37 has an atomic mass of 36.966 amu and a percent abundance of 24.23%. To calculate the average atomic mass of chlorine, use the information in a periodic table of the element (see Resources) to find the (weighted) average but changing the percents to decimals: (34.969×0.7577)+...
Each element on the periodic table has an atomic mass -- an approximation of the mass of a single atom of that element. Because atoms are so small, a specific unit is used to measure the mass of small quantities of atoms. Very large quantities of atoms a
Each12C atom has six protons and six neutrons in its nucleus, adding up to an atomic mass of 12 AMU.Electronshave a low mass, so they are assumed to have a negligible effect. Consequently, the nucleus accounts for almost the entire mass of the atom of any element, which means that a ...
这个标准原子就是碳12原子。科学家将碳12原子的质量设定为12个原子质量单位。因此,一个原子质量单位amu,就是碳12原子质量的1/12。 Although a mass of 1 amu is nearly equal to the mass of a single proton or a single neutron, it is important to realize that the values are slightly different. Tab...
To calculate the number of moles of a solute, you need two pieces of information, which you may have to infer from other data. The first is the chemical formula of the solute, and the second is the mass of the solute. You then calculate molarity by measuring the volume of the solution...
First of all, convert the masses to the number of moles of each compound, and use theperiodic tablefor the atomic masses of the elements. Besides, the atomic mass unit of carbon is 12.0 amu (rounding to one decimal place) and of chlorine, the amu is 35.5. So, one mole ...
How does an atom try to fill its valence shell? If you know the atomic number and the mass number of an isotope of an element, how can you determine the number of protons and neutrons? Explain the concept of the mole. How many electrons does aluminium have? Calculate the number of mole...
Element W has two natural isotopes: W-10 (10.013amu) and W-11 (11.009 amu) Calculate the atomic mass of element W given the abundance of W-10 is 19.66% I thought that I needed abundance for both isotopes to solve the atomic mass? I’m really bad at Math and Chemistry... I thought...
You can use the atomic mass of hydrogen, measured in AMU, to calculate the fraction of a mole of the gas in your sample. Just divide the mass of your sample, in kilograms, by the mass of one mole in kilograms. Since one mole of hydrogen gas has a mass of 2.016 × 10-3 kg, ...
To calculate the atomic mass of asingle atomof an element, add up the mass ofprotons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. The...