Flashcards
What does Avagadro’s constant represent??
The number of atoms in $12$ grams of Carbon-12.
What is one mole of a substance??
An amount in which the number of atoms/molecules is equal to Avogadro’s constant.
What is the molar mass of a substance??
The mass per mole of a substance.
How do you find the mass of one atoms from its mass number/nucleon number??
Divide the mass number by Avogadro’s constant.
What is a nucleon??
A proton or a neutron.
What is the mass number??
The number of protons or neutrons in the atom.
$$^{35}_{17} Cl$$ Which number is the mass/nucleon number?/
$$ 35 $$
How can you calculate the number of particles from the number of moles of a substance??
$$ \text{number of moles} \times \text{Avagadro’s constant} $$
What is the molecular mass of a substance??
The mass of one molecule/atom of that substance.
What is the value of Avogadro’s constant??
$$ 6.02 \times 10^{23} $$
How many atoms are there in one mole of $^{12}C$??
$$ 6.02 \times 10^{23} $$
How many atoms are there in one mole of $^{35}Cl$??
$$ 6.02 \times 10^{23} $$
How many grams are there in one mole of $^{12}C$??
$$ 12g $$
How many grams are there in one mole of $^{35}C$??
$$ 35g $$
What is $N$ (the number of atoms/molecules) in terms of $n$ (the number of moles) and $N_a$ (Avogadro’s constant)??
$$ N = n \times N_A $$
What is $m$ (the mass of a substance) in terms of $n$ (the number of moles) and $M$ (the molar mass)??
$$ m = n \times M $$
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date: 2021-11-08 16:48
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title: Physics - Moles