Given:
2.5 mol O2
Required:
Grams of water
Solution:
2H2 + O2 -> 2H2O
Moles of H2O = (2.5 mol O2)(2
moles H2O/1 mole O2) = 5 moles H2O
Molar mass of H2O = 18.02 g/mol
Mass of H2O = (5 moles H2O)( 18.02
g/mol)
Mass of H2O =90.1g H2O
<span>The correct answer would be: 4 oxygen atoms</span>
Diamond is the hardest naturally occurring substance found on Earth.
Answer:-
Metalloids
Explanation: -
Metalloids are elements with properties that are somewhat in between those that of metals and non metals. They have generally 4 or 5 electrons in their valence shell for up to the 4th period to be called a metalloid. From the fifth period 6 valence electrons can make an element metalloid.
From the sixth even 7 valence electrons can make an element metalloid
The electronic configuration of Germanium is
2,8,18, 4
So it is a metalloid.
The electronic configuration of tellurium,
2,8,18, 18, 6
So it is a metalloid.
The electronic configuration of Arsenic
2,8,18, 5
So it is a metalloid.
The electronic configuration of astatine
2,8,18, 32, 18, 7
So it is a metalloid.
