A positively charged nucleus with two protons and two neutrons hope this helps :)
The law of conservation of mass states that mass can neither be created nor destroyed. For example in an isolated system, mass of the reactants is equal to the mass of the products. Thus, mass or the quantity of the system under consideration will remain unchanged through any physical or chemical process.
In the given example, the board initially has a mass of 750 g. It is physical transformed to sawdust by grinding. Based on the conservation of mass, the pile of sawdust would still weigh 750 g.
<span>To find the percent composition of KCLO(2), calculate the total mass of the molecule: K has 39.0983 g/mol, Cl has 35.4532 g/mol, and O(2) is 31.99886 g/mol. This sums to 106.5501 g/mol. Next, find the percentages of each element: K would have (39.0983/106.5501) = 0.366948 or 36.6948%, Cl would have (35.4532/106.5501) = 0.332737 or 33.2737%, and O(2) would be (31.99886/106.5501) = 0.300318, or 30.0318%. Summing these three percentages gives 100.0003%, which is within the scope of a rounding error.</span>
Max of eight electrons in the 2nd level
