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How can you determine the mass of an unknown element from a mass of a known element?
You can't -- at least you can't be sure. What determines the identity of an element is the number of protons in the nucleus. The mass number however is the sum of the number of protons and the number of neutrons. And because the number of neutrons in a single element can vary by as much as 10 or more from atom to atom, more than one element can have the exact same mass number.
As a simple example of this, take a mass number of three. That could be hydrogen with two neutrons, helium with one neutron, or lithium with no neutrons. All three are possible.
What else can I help you with?
How is the number of moles of an element determine from a known mass?
The mass of 1 mole of the element is used as a conversion factor to convert grams to moles
What information could you use to determine the atomic number of an unknown element that has the mass number of 22?
To determine the atomic number of an unknown element with a mass number of 22, you would need to know the number of protons in the nucleus of the element. Since the mass number is the sum of protons and neutrons, subtracting the number of neutrons from the mass number would give you the atomic number. This is because the atomic number represents the number of protons in an element's nucleus.
What is a unknown element that has a mass number of 22?
All elements that have an atomic mass of 22 are known. One example would be 22 sodium. Now, if you are talking about the atomic number of 22, that would be Titanium, which is also known.
What information could you use to determine the atomic number of unknown element that has a mass number of 22?
To determine the atomic number of an element with a mass number of 22, you would need the number of protons in the nucleus. Since the mass number is the sum of protons and neutrons, subtracting the number of neutrons (mass number) from the mass number gives you the number of protons (atomic number).
Calculate the average atomic mass of an unknown element that has two naturally-occurring isotopes The first isotope occurs 75.47 percent of the time and has a mass of 248.7 amu The second isotope occu?
To calculate the average atomic mass, multiply the mass of each isotope by its natural abundance (expressed as a decimal), then add the results together. For the unknown element: Average atomic mass = (0.7547 * 248.7 amu) + (0.2453 * x) Given the only known isotope mass is 248.7 amu, you'll have to provide the mass of the second isotope to determine the average atomic mass.
How is the number of moles of an element determine from a known mass?
The mass of 1 mole of the element is used as a conversion factor to convert grams to moles
What info could you use to determine the atomic number of an unknown element that has a mass number of 22?
In order to answer this, the number of neutrons must also be known. Subtract the number of neutrons from the mass number and the result is the atomic number. mass no. - no. of neutrons = atomic number (no. of protons)
What information could you use to determine the atomic number of an unknown element that has the mass number of 22?
To determine the atomic number of an unknown element with a mass number of 22, you would need to know the number of protons in the nucleus of the element. Since the mass number is the sum of protons and neutrons, subtracting the number of neutrons from the mass number would give you the atomic number. This is because the atomic number represents the number of protons in an element's nucleus.
What is a unknown element that has a mass number of 22?
All elements that have an atomic mass of 22 are known. One example would be 22 sodium. Now, if you are talking about the atomic number of 22, that would be Titanium, which is also known.
How is the number of moles of an element determined from the known mass?
To determine the number of moles of an element from its known mass, you can use the formula: moles = mass / molar mass. First, find the molar mass of the element from the periodic table. Then, divide the given mass of the element by its molar mass to find the number of moles.
What is the weighed-average mass of all the known isotopes for an element called?
The weighted-average mass of all the known isotopes for an element is called the atomic weight or atomic mass. It is calculated by taking into account the abundance of each isotope and its mass to determine the average mass of all isotopes present in nature for that element.
What information could you use to determine the atomic number of unknown element that has a mass number of 22?
To determine the atomic number of an element with a mass number of 22, you would need the number of protons in the nucleus. Since the mass number is the sum of protons and neutrons, subtracting the number of neutrons (mass number) from the mass number gives you the number of protons (atomic number).
How is the number of moles of an element determined froma known mass?
To determine the number of moles of an element from a known mass, you use the element's molar mass (grams per mole). Simply divide the given mass of the element by its molar mass to calculate the number of moles. This relationship is described by the formula: moles = mass (g) / molar mass (g/mol).
What do you call the mass of an element?
The mass of an element is known as it's ATOMIC Mass.
How can one determine the mass of an element in a compound?
To determine the mass of an element in a compound, you can use the chemical formula of the compound and the atomic mass of the element. Multiply the atomic mass of the element by the number of atoms of that element in the compound, then add up the masses of all the elements present in the compound to find the total mass.
How are mass calculations used?
Mass percentage calculations determine the percentage of an element based on mass in a compound. This can then be used to determine the percentage in a compound of each individual element.
How can one determine the density of an element?
To determine the density of an element, you would need to measure its mass and volume. The density of an element is calculated by dividing its mass by its volume. The formula for density is: Density Mass / Volume. By measuring the mass and volume of the element, you can then calculate its density.
