When the following equation is balanced, the coefficient of H2O is Ca(s) + H2O + Ca(OH)2 + H2 a) 2
1 answer:
Answer:
Explanation:
Given:
In a balanced chemical equation, the number of atoms of each element are equal on both sides.
No. of atoms of Ca in left hand side = 1
No. of atoms of Ca in right hand side = 1
So, no. of atoms of Ca is balanced
Now,
No. of atoms of O in left hand side = 1
No. of atoms of O in right hand side = 2
Now multiply H2O with 2
No. of atoms of O are balanced on each side
No. of atoms of H in left hand side = 4
No. of atoms of H in right hand side = 4
Now, each element is balanced
So coefficient of H2O after balancing = 2
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Answer:
260.34g
Explanation:
First, you need to know what angelic acid is comprised of. It is written as C₅H₈O₂.
In order to solve for the mass of 2.6 moles of angelic acid, you need the mass of 1 mole of angelic acid. This can be found by adding the masses from the periodic table, like shown below:
5 carbon atoms = (5)(12.01g) = 60.05g
8 hydrogen atoms = (8)(1.01) = 8.08g
2 oxygen atoms = (2)(16) = 32g
angelic acid = 60.05 + 8.08 + 32 = 100.13g
Then, set up a basic stoichiometric equation and solve. The units should cancel out.