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the elements in the substance are mixtures of their isotopes

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Lia Ruecker

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2y ago
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16y ago

Atomic masses are measured as grams/mol which is an Atomic Mass unit(u). One (u) is the same as 1.6605387828383838383838383839 X 10^-27 kg. This is a very tiny amount and instead of working with that many digits, they made a shorter form, which is grams/mol or u.

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13y ago

Because the mass of an electron is very insignificant compared to protons and neutrons.

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Q: Why aren't grams used to measure atomic mass?
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What is the difference between atomic mass and relative atomic mass?

Atomic mass is the measure of a mass of one atom in relation to 1/12 mass of Carbon 12 atom and measured in atomic mass unit(amu) or Dalton unit or grams/mol.Relative atomic mass is also the relative mass but does not have a unit but a ratio number.


What is the atomic mass of arsenic?

The atomic mass is 74.9216 grams.


What does the atomic mass of an element measure?

Atomic mass of an element measures the mass of that element on a molecular scale, taking into account neutrons and protons, which weigh approximately 1. Electrons are negated. Atomic mass is also the mass, in grams, of 1 mole of that element.


What is the atomic mass of an element expressed in grams?

Gram Atomic Mass


What is the mass and the atomic of Be?

Beryllium (Be) has the (weighted) atomic mass of 9.0121831 grams. The atomic number is 4.


How many grams are in mass?

Grams are a measure of mass.


Does atomic mass has a positive change?

No. Atomic mass is a measure of mass, not charge.


How many grams in one mole of silicon?

By definition, one mole would be the same as the atomic mass. You take the number of moles and multiply it by the atomic mass. So if you have just 1 mole, the number of grams will be the atomic mass. Selenium's atomic mass is 78.96 grams.


What is the difference between atomic mass and atomic mass unit?

The atomic mass unit is used to express the measure of the atomic mass.


How many moles are in 5.87 g Ni?

By definition, one mole would be the same as the atomic mass. You take the number of moles and multiply it by the atomic mass. So if you have just 1 mole, the number of grams will be the atomic mass. Nitrogen's atomic mass is 14.007 grams.


How many gram does one mole of helium gas weighs?

By definition, one mole would be the same as the atomic mass. You take the number of moles and multiply it by the atomic mass (divide by one mole for units to cancel). So if you have just 1 mole, the number of grams will be the atomic mass. Helium's atomic mass is 4.003 grams.


How much atomic mass unit 1 g substance has?

Atomic mass is not a measure assigned to gross mass such as grams, kilograms, pounds, stones, tons etc.Atomic mass of an element is determined by the number of protons there are in the nucleus of that element.The amu (atomic mass unit) is standardized as 1/12 of the mass of an atom of Carbon