Answer:
Option C. 4.03 g
Explanation:
Firstly we analyse data.
12 % by mass, is a sort of concentration. It indicates that in 100 g of SOLUTION, we have 12 g of SOLUTE.
Density is the data that indicates grams of solution in volume of solution.
We need to determine, the volume of solution for the concentration
Density = mass / volume
1.05 g/mL = 100 g / volume
Volume = 100 g / 1.05 g/mL → 95.24 mL
Therefore our 12 g of solute are contained in 95.24 mL
Let's finish this by a rule of three.
95.24 mL contain 12 g of sucrose
Our sample of 32 mL may contain ( 32 . 12) / 95.24 = 4.03 g
Answer:
a) Explain why:
(i) All the elements of a group have similar chemical properties.
(ii) All the elements of a period have different chemical properties.
(b) The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm, 104 pm and 143 pm respectively. Giving a reason arrange these elements in the increasing order of atomic number in the period.
Answer:
b
c
250 mL
Explanation:
The second equation is: Molarity 1 x Volume 1 = Molarity 2 x Volume 2
Plug in, solving for Volume 2
Solve
The law of partial pressures states that each component exerting pressure contributes to the total, and the sum of these pressures equals the total exertion. This means that the pressure of all three gases added together equals 1514.
X + 325 + 649 = 1514
X=540
The partial pressure of Argon in this system is 540 pounds per square inch.