I believe the third one if i am not mistaken
Answer:
0.022 mol O
Explanation:
Mg3(Si2O5)2(OH)2
We can see that 1 mol of this substance has 3 mol of Mg.
Oxygen altogether is 5*2 (from (Si2O5)2) + 2(from(OH)2) = 10 +2 = 12
So, 1 mol of this substance has 12 mol oxygen.
So, 1 mol of this substance contains 3 mol Mg and 12 mol O, or
ratio Mg : O = 3 : 12 = 1 : 4
1 mol Mg ----- 4 mol O
0.055 mol Mg ---x mol O
x = 0.055*4/1 = 0.220 mol O
Answer: Mass
Explanation:
The moon and the Earth have a much higher gravitational pull than people because they weigh way more.
Answer:
C.
two in the reactants and two in the products
Explanation:
The law of conservation of mass helps us balance chemical equations so that there are the same number and type of atoms in the reactants and products.
There are two nitrate ions in Ba(NO3)2 and two in 2LiNO3.
Answer:Lone pairs are the valence electron pair of any element which do not take part in bonding but affect the shape of molecules. Bond pairs or shared pairs are the electron pair which does both affect the geometry of molecules and take part in chemical bonding. These are form due to sharing of electrons.
Explanation:
