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<span>In 5.70 mol of Hafnium there are 34,326 208 203*10^23 atoms.</span>
Answer:
B
Explanation:
Molarity measures the strength of a solution. Remember, a solution is made up of two parts: the solvent (which does the dissolving) and the solute (the substance that is dissolved). The more solute there is, the higher the concentrate and therefore the higher the molarity of the solution. Thus B is the answer
Answer: Thus 44 g of 
will be produced if 30 g of 
were reacted with an excess of oxygen
Explanation:
To calculate the moles :
The balanced chemical equation is:
As is the limiting reagent as it limits the formation of product and 
is the excess reagent.
According to stoichiometry :
1 mole of produce = 6 moles of
Thus 0.17 moles of will produce=
of
Mass of 
Thus 44 g of will be produced if 30 g of were reacted with an excess of oxygen.
