Answer:
A) The total number of molecules of reactants has to be the same as the total number of product molecules
Explanation:
In chemistry, a chemical equation consists of reactants and products. The reactants are the compounds/substances that chemically combine to give rise to the products. According to the law of conservation of mass, a chemical equation needs to be BALANCED.
A chemical equation is said to be BALANCED when the number of atoms/molecules on the reactant side is equal to that on the product side. In other words, total number of molecules of reactants has to be the same as the total number of product molecules
Answer:i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.
Explanation:
I believe it is happening more towards the middle states of the US...
Oxidation half reaction :-
<span>Cu --------> Cu2+ + 2e- ...(1) </span>
<span>this is the balanced oxidation half reaction </span>
<span>b) reduction half reaction :- </span>
<span>NO3- -----------> NO </span>
<span>balance oxidation no. </span>
<span>NO3- + 3e- --------> NO </span>
<span>balance charge by adding H+ </span>
<span>NO3- + 3e- + 4H+ ---------> NO </span>
<span>now balance O and H atoms by addin H2O... </span>
<span>NO3- + 3e- + 4H+ ---------> NO + 2H2O....(2) </span>
<span>this is balanced reduction half reaction </span>
<span>multiply (1) by 3 and (2) by 2 and add </span>
<span>3Cu ---------> 3Cu2+ + 6e- </span>
<span>2NO3- + 6e- + 8H+ ---------> 2NO + 4H2O </span>
<span>--------------------------------------... </span>
<span>6e- will cancel out fom both sides... </span>
<span>3Cu + 2NO3- + 8H+ ---------> 3Cu2+ + 2NO + 4H2O </span>