You have to do yards to area so that means that you have to subtract
I'm assuming that you meant to write 'two 100-w per hour light bulbs used a total of 400w. how many hours did the bulbs run'
so each used 100w per hour and there are 2 light bulbs so in 1 hour 200w is used
200wh times x hour=200wx=400w
divide both sides by 200w
x=2
they ran for 2 hours
The correct equilibrium constant expression for this equation is;

Given
Consider the equation below.

<h3>What are Species?</h3>
In an equilibrium constant expression, you do not include the solid substances; only gases and dissolved substances.
<h3>Equilibrium constant expression;</h3>
It is the quotient of the product of the concentrations of the species on the right-hand side of the equilibrium equation, each raised to its corresponding coefficient, and the product of the concentrations of the species on the left-hand side, each raised to its corresponding coefficient.
Therefore,
The correct equilibrium constant expression for this equation is;

Hence, the correct equilibrium constant expression for this equation is;
.
To know more about Equilibrium constant click the link is given below.
brainly.com/question/19240570
Answer:
he spent $0.15 on each pencil
Step-by-step explanation:
12x4= 48, which is the exact amount of pencils he bought, and then divide them by the price
7.20 divided by 48 is 0.15.
Therefore, each pencil is 0.15 cents a piece
Answer:
We have 20 category Questions split into 5
Where we would assume that the 3rd question is simply 1/4 + 5/20 chance.
This is not a determiner as Robin is asked more questions.
So it is simply 1/4 and kept to factors that Robin will answer one of the 4 choices upon the 3rd question as 1/4 regardless of other questions being asked. Where Robins first answer would be the third question we subtract 4/5 = 16/20 - 5/20= 11/40. Which can only be rounded down to 2 decimal places 0.275
Step-by-step explanation: