What is the mass for 3.01*10 23 molecules h2o
2 answers:
Answer:
The answer is 8.99 g of water
Explanation:
First we calculate the molecular mass of water, as follows. using the periodic table we have the masses of hydrogen and oxygen:
MW of H2 2 x 1 g/mol=2g/mol
MW of O: 16 g/mol
MW of H2O=2+16=18 g/mol
using Avogadro's number and making a simple direct rule of three we have:
6.023xmol----------------------18 g
3.01x mol------------------------ Xg
Clearing the X, we have:
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Answer:
Three hydrogen atoms to form PH₃.
Explanation:
Hello!
In this case, since the elements belonging to the nitrogen family (N, P, As, Sb and Bi) show five valence electrons, because there are five electrons at their outer shell, it is clear that if phosphorous bonds with hydrogen, it is going to require the same amount of oxygen atoms (3) because elements having five valence electrons need 3 bonds in order to attain the octet (5+3=8).
Therefore the compound would be:
Which is phosphine.
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