Answer:
a) 6.426 grams of potassium bromide student must weigh.
b) The correct answer is option a.
Explanation:
a) Concentration of potassium bromide = c = 0.180 M
Moles of potassium bromide = n
Volume of the potassium bromide solution = 300 mL = 0.3 L
Mass of 0.054 moles of potassium bromide :
= 
6.426 grams of potassium bromide student must weigh.
b) Drying of flask in drying oven. This is because solution will be prepared by adding water after adding solute. So drying the flask will be not required.
The two properties which provide the greatest resistance to the flow of a current are the long and thin wires.
<h3>What is resistance?</h3>
Resistance is the quantity which define the flow of current from any wire and it is represented as:
R ∝ l/A, where
l = length of wire
A = cross section of wire
From the relation it is clear that resistance is high in long wire and thin wire.
So, required properties are long and thin.
To know more about resistance, visit the below link:
brainly.com/question/17563681
Answer:
B) -1.00 M/min
Explanation:
Based on the reaction:
2 SO2(g) + O2(g) → 2SO3(g)
<em>2 moles of SO2 are consumed per mole of O2 producing 2 moles SO3</em>
<em />
In the problem, the sulfur dioxide has a rate of change of -2.00M/min. As the moles of oxygen that reacted are half the moles of SO2, its rate of change is halved, that is:
<h3>B) -1.00 M/min
</h3>
The volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.
Explanation:
The kinetic theory of gases is mostly based on Boyle's law. From the Boyle's law, the pressure experienced by any gas molecules is inversely proportional to volume of the gas molecules. Also this inverse relation is obeyed if and only if the number of moles and temperature of the gas molecules remained constant.
So,
So if there is a change in pressure then there will be inverse change in volume. That means if there is decrease in the pressure of gas molecules then there will be increase in the volume and vice versa.
So the Boyle's law is combined as 
As here the initial pressure or 
is 1 atm or 101.3 kPa and the initial volume is 478 mL. Similarly, the final pressure is 93.3 kPa and the final volume will be
So, the volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.
The correct answer is C.
Most of the time, double replacements produce one product that is soluble and one that is insoluble
This results in a precipitate within a liquid or aqueous solution
Hope this helps
