What is formed when atoms join together with a covalent bond?
2 answers:
Answer: B. a molecule
Explanation: Covalent bond is formed by the sharing of electrons between atoms.
is a molecule formed by the sharing of electrons between two hydrogen atoms.
An ion is formed by losing or gaining electrons.
A neutral atom is one which contains equal number of protons and neutrons.
A noble gas is one which contains completely filled orbitals.
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Answer:
2.24dm³
Explanation:
Given parameters:
Mass of He = 40g
Unknown:
Volume of Helium = ?
Solution:
To solve this problem, we convert the given mass to number of moles.
Number of moles =
molar mass of He = 4g/mol
Number of moles = = 0.1mole
So;
1 mole of gas at rtp occupies a volume of 22.4dm³
0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³