<span>Water has greater surface tension than ethanol.
The external force is the impact by which an outer object has in contact with the object being described. The force that is stronger prevails in that collision. </span><span>Physical properties are those which can be measured or observed without altering the composition of matter.</span>
<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.
</span>
Answer:
2
Explanation:
You write your answer with the same number of significant figures as the number with the smallest amount of figures, in this case, that number is 2.1 so your answer should be written with 2 significant figures.
The process is know as diffusion in which substances move from higher concentration to lower concentration
X is the gas and Y is the liquid. Intermolecular distances are farther apart in gases than in liquids.
