Answer:
Melting Is when a substance is actually melting and melting point is a point at which a substance is able to melt.
Answer:
1.2 x 10²⁴atoms
Explanation:
Given parameters:
Molar mass of Mg = 24.3g/mol
Mass of Mg = 48.6g
Number of atoms in 1 mole = 6.02 x 10²³ atoms
Solution
We know that
1 mole contains 6.02 x 10²³ atoms
Now we have to find the number of moles that are in the given mass of the magnesium atom.
Number of moles =
Number of moles = = 2mole
Now 2 moles of Mg will contain 2x 6.02 x 10²³ atoms = 1.2 x 10²⁴atoms
Answer:
The required volume is 1.12 L.
Explanation:
Given,
Mass of O2 gas= 1.60 grams
We know,
Number of moles = Mass/Molecular mass
= 1.60/32 [Molecular mass of O2 gas is 32 gram]
= 0.05
Again,
We know that at STP,
Number of moles = Volume in L / 22.4 L
or, Volume = Number of moles X 22.4
or, Volume = 0.05 X 22.4
or, Volume = 1.12
∴The required volume is 1.12 L.
Answer:
The answer is
<h2>5.50</h2>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question
mass = 22 g
density = 4 g/mL
The volume is
We have the final answer as
<h3>5.50 mL</h3>
Hope this helps you