The Equation is CaH2(s)+2H2O(l)-->Ca(OH)2(aq)+2H2(g)
so,
moles of H2 generated = PV / RT
R = 62.363 L Torr K−1 mol−1
number of moles = 814 * 53.5 / 62.363 * 293
= 2.38 moles
looking at the equation these came from 2.38 /2 moles of CaH2 or 1.19 moles
Molar mass of CaH2 is 42.0943 g/mol
so mass of CaH2 = 1.19 X 42.1 = 50.01g
Answer:
CHO2- ion
Explanation:
We have the lewis structure of a formate-ion here
This is CHO2-.
The carbon atom is the central atom in the structure. It's the least electronegative atom (C). Carbon has 4 valence electrons. Oxygen has 6 valence electrons.
The carbon will bind with 1 hydrogen atom, this will form 1 single bond, because hydrogen has 1 valence electron.
The carbon will bind with oxygen via a double bond.
Since carbon has only 4 valence electrons, it can only form 1 bond with the other oxygen atom.
There will formed 1 double bond between C and O and 1 single bond between C and O resulting in a negative charged O-atom.
This means there are two resonance structures. for the CHO2- ion
The entire mass of a black hole
Answer: the person standing up
Explanation:
the person has the potential to fall or move from position
Answer:A. They demonstrated emotions
Explanation: Ottonian manuscript are illuminated manuscripts,metal works which represented religious texts and believes. This art works were made in Germany during the Renaissance period lasting between the tenth and eleventh century. The Ottonian manuscripts and art works were produced by monks and nuns in the monasteries during those periods. The people of the Ottonian Kingdom loved mathematics and it was reflected in the art works which they produced during those times.