The denser the solid the more likely it is to sink
<span>How many moles of sodium chloride (NaCl) solute are in 155 grams of an 85.5 percent by mass solution?
1) Calculate the mass of solute
% = [mass of solute / mass of solution] * 100 =>
mass of solute = [% / 100] * mass of solution = [85.5/100] * 155 g = 132.525 g
2) Pass to moles using the molar mass, MM, of NaCl
MM = 23 g/mol + 35.5 g/mol = 58.5 g/mol
n = mass (g) / MM = 132.525 / 58.5 = 2.27 mol
Answer: the second option of the list
4. How many grams of zinc metal will react completely with 8.2 liters of
3.5 M HCl? Show all of the work needed to solve this problem.
Zn (s) + 2 HCl (aq) ---> ZnCl2 (aq) + H2 (g)
From the molarity, calculate the number of mols of HCl
M = n/V => n = M*V = 3.5 mol/liter * 8.2 liter = 28.7 mol HCl
From the reaction: [1 mol Zn / 2 mol HCl] * 28.7 mol HCl = 14.35 mol Zn
Pass to mass, using the atomic mass of Zn
mass = n*atomic mass = 14.35 mol * 65.4 g/mol = 938.5 g Zn
Answer: 938.5 g.
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Answer:
The answer to your question is: letter D
Explanation:
A. a motile archaea Archea don't have peroxisomes then this option is wrong.
B. a nonmotile eukaryote The new organism has flagella then it can move, so this option is wrong.
C. a motile bacterium Bacterium don't have peroxisomes so this option is wrong.
D. a motile eukaryote This is the correct option because an eukaryote can have all the characteristics described.
Explanation:
Dinitrogen trioxide is a nitrogen oxide. Nitrogen trioxide appears as a blue liquid with a sharp, unpleasant chemical odor.
Description: Dinitrogen trioxide is a nitrogen oxide.ChEBINitrogen trioxide appears as ...
Synonyms: Dinitrogen trioxideNITROGEN TRIOXIDENitrogen oxide (N2O3)10544-7...
Molecular Formula: N2O3
Molecular Weight: 76.012 g/mol
Answer: 2 moles of 
will be formed.
Explanation:
To calculate the moles :
The balanced chemical equation is:
According to stoichiometry :
2 moles of 
give = 2 moles of
Thus 2 moles of give =
of
Thus 2 moles of will be formed.
