There are 6.022 × 10²³ atoms in 39.948 g of argon and 4.0026 g of helium.
Explanation:
39.945 g/mole is the molar mass of argon so 39.948 g of argon are equal to 1 mole of argon.
4.0026 g/mole is the molar mass of helium so 4.0026 g of helium are equal to 1 mole of helium.
We know that Avogadro's number tell us the number of particles in 1 mole of substance which is 6.022 × 10²³.
So in 39.948 g of argon and 4.0026 g of helium contains the same number of atoms, 6.022 × 10²³.
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Avogadro's number
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An atom always has the same number of protons and electrons, so it has 14 electrons.
Remembe! Dont get confused between at atom and an ion. Atoms have same number of protons and electrons but in an ion it differs,
Answer:
D
Explanation:
We have to bear in mind that the acid is a weak acid. A weak acid does not dissociate completely in solution. We will have more concentration of undissociated acid than A^- and H3O^+ and OH^- in the system at equilibrium.
Being a weak acid, there is maximum concentration of water molecules followed by that of undissiociated acid.
Hence, for this solution, the concentration of ions in solution follows the order;
[H2O] > [HA] > [A-] ~ [H3O ] > [OH-]
Answer:
Explanation:
Many elements have one or more isotopes that are radioactive these are called radioisotopes their their nuclei are unstable so they break now or decay and emit radiation
Answer:
There is 1 Sodium in NaCl, but 2 Sodiums in the sulfide. I can’t write it properly. But the “2” should be a subscript.
Explanation:
