Cao + H2O ---->Ca(OH)2
Calculate the number of each reactant and the moles of the product
that is
moles = mass/molar mass
The moles of CaO= 56.08g/ 56.08g/mol(molar mass of Cao)= 1mole
the moles of water= 36.04 g/18 g/mol= 2.002moles
The moles of Ca (OH)2=74.10g/74.093g/mol= 1mole
The mass of differences of reactant and product can be therefore
explained as
1 mole of Cao reacted completely with 1 mole H2O to produce 1 mole of Ca(OH)2. The mass of water was in excess while that of CaO was limited
Lower fertility and longer lifespans steadily increased the potential labor force relative to the total population
The main purpose of scientific methods, is to show the variations of the topic you are doing in science and how you are proving it to be that way.
The answer is D
Because the bread cannot go back to its previous state, and because a new substance was formed. :)
Both compare the rate of population growth.
