The statement is true. If a mineral lacks the presence of iron in it then it will be generally dimagnetic. It means non iron minerals do not show magnetic property in general. There are some minerals like serpentine do show some magnetic susceptibility, however this is negligible as compared to iron minerals hence the ores with no magnetic are generally diamagnetic.
A solution is uniform throughout, so your answer is the first one.
Answer is (4) - 4.
The atomic number of Germanium (Ge) is 32 and it is placed in 14th group of periodic table. In the neutral atom, 32 electrons are present. The electron configuration of Ge is [Ar] 3d¹⁰ 4s² 4p².
Valence electrons are the electrons which are in outer shell of the atom. There are 4 electrons in outer shell of Ge atom at ground state.
Answer: The percent yield of lithium chloride if a reaction starts with 20.0 g lithium hydroxide and yields 6.00 g lithium chloride is 17.2 %
Explanation:
The balanced chemical reaction is
To calculate the moles, we use the equation:
a) moles of 
b) moles of 
According to stoichiometry :
1 mole of produces = 1 mole of
Thus 0.83 moles of produce=
of
Mass of 
The theoretical yield of = 34.9 g
The experimental yield of ethanol = 6.00 g
Now we have to calculate the percent yield of ethanol.
Therefore, the percent yield is, 17.2 %
It would be $7.10, making the total bill $42.61
