Complete Question:
The complete question is shown on the first uploaded image
Answer:
The answer is option C
Explanation:
From the question we are told that
12 resistors + 20 insulators + 8 memory chips → 4 circuits
Now from this expression we can see that
20 insulators produces 4 circuit
And we are being as to calculate how many circuit 5 insulators would produce
S using basic relation we have that
20 is to 4
then 5 is to ? let call ? = x
applying cross multiplication we have that
20 × x = 4 × 5
Therefore x = (4 × 5) ÷ 20
x = 1 circuit
We can see from our calculation that 5 insulators would produce one circuit
<u>Answer:</u> The molarity of KBr solution is 0.605 M
<u>Explanation:</u>
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L.
The formula used to calculate molarity:
.....(1)
Given values:
Given mass of KBr = 54.0 g
Molar mass of KBr = 119 g/mol
Volume of the solution = 750 mL
Putting values in equation 1, we get:
Hence, the molarity of KBr solution is 0.605 M
Answer:
1.
2. a. No effect;
b. Products;
c. Products;
d. Reactants
Explanation:
1. Equilibrium constant might be written using standard guidelines:
Based on the guidelines, we have two ions on the product side, a solid on the left side. Thus, the equilibrium constant has the following expression:
2. a. In the following problems, we'll be considering the common ion effect. According to the principle of Le Chatelier, an increase in concentration of any of the ions would shift the equilibrium towards the formation of our precipitate.
In this problem, we're adding calcium carbonate. It is insoluble, so it wouldn't have any effect on the equilibrium.
b. Sodium carbonate is completely soluble, it would release carbonate ions. The carbonate ions would combine with calcium cations and more precipitate would dissolve. This would shift the equilibrium towards formation of the products to reproduce the amount of calcium cations.
c. HCl would neutralize calcium hydroxide to produce calcium chloride and water, so the amount of calcium ions would increase, therefore, the products are favored.
d. NaOH contains hydroxide anions, so we'd have a common ion. An increase in hydroxide would produce more precipitate, so our reactants are favored.