Answer:
d) 60%
Explanation:
Given the chemical formula;
MgO = Magnesium oxide.
First of all, we would determine the relative molecular mass (RMM) of MgO.
Atomic mass of Mg = 24
Atomic mass of O = 16
RMM (MgO) = 24 + 16 = 40 g/mol
Next, we would find the percent by mass of magnesium (Mg);
% Mg = 24/40 * 100
% Mg = 2400/40
% Mg = 60 percent.
Plato's famous philosophical work was called The Republic. In this seminal work Plato, who was a famous Greek philosopher from the antique times, he was describing how a utopia in the form of a country would look like. His work is still being read tody and is considered an important piece of intellectual work in some aspects.
Second World War allied military strategy for Europe: Roosevelt and Churchill and their friends face in Washington in the year of 1941. <u>Explanation:</u>
- They concluded that they must first produce a huge attempt at beating Germany, then they would stop Japan.
- They needed to produce a large cross-channel attack of Europe from Britain.
- Roosevelt out three circumstances that he believed were critical: the amazing 'power of protection' of the Red Army; the huge equipment of American armaments; and the victory of Allied airpower.
I think the answer will be the first one because it is both not very general and not very specific.