C would be the right answer
Answer:
So, the mole ratio between sodium and sodium oxide is 2:1=2
Explanation:
Answer:
Molality = 0.43 m
Explanation:
Given data:
Mass of barium sulfide = 25.4 g
Mass of water = 349 g (349 g/1000 = 0.349 Kg)
Molality of water = ?
Solution:
Number of moles of barium sulfide:
Number of moles = mass/molar mass
Number of moles = 25.4 g/169.39 g/mol
Number of moles = 0.15 mol
Molality:
Molality = number of moles o f solute/ Kg of solvent
Molality = 0.15 mol / 0.349 Kg
Molality = 0.43 m
Mass is the amount of matter in the body.
Weight is the measure of force.
Answer:
E
Explanation:
To know what will happen, we need to know
the total number of electrons the element have.
This can be calculated by adding all the electrons together
That would be 2 + 2 + 6 + 2 + 4 = 16
This shows that the element is sulphur.
Now using the KLMN electronic configuration, sulphur has the shells 2,8,6 meaning there are 2 extra electrons needed for octet configuration to be achieved.
This makes option E the correct answer to the question
