CHEMISTRY HIGH SCHOOL

Which of these is NOT a way, or a proposed way, to store nuclear fuel rods after they have been used in a nuclear reactor?

Answers

Answer 1
Answer:

The question given above is not complete, the options attached to the question is given below:

A). Putting them in a deep pool of water

B). Burying them in a deep underground storage facility

C). Sending them on the shuttle to be suspended in space

D). Putting them in concrete/lead casks and sitting at thereactor site 

 ANSWER

The correct option is C.

There are many ways of storing spent nuclear fuel rods, these include: immersing them in deep pool of water, storing them in lead casks and burying them in deep underground storage. These forms of storage are utilized in order to protect people and the environment from the harmful radiations that radiate from these fuel rods. Spent fuel rods must never be exposed, therefore it is not possible to suspend them in space. 
Answer 2
Answer:

Answer:

c

Explanation:

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A solution has a (oh-) = 8.6 × 10-5 the poh=, ph=, (h+)=

Answers

pOh is calculated by the negative logarithm of hydroxide ions concentration. From the given value, we have:

pOH = -log(8.6 x 10 ^-5)
pOH = 4.07

To calculate the pH we use the relation of pOH and pH, expressed as:

14 = pOH + pH
pH = 14 - 4.07 = 9.93
pH = -log [H+]
[H+] = 10^-9.93 = 1.16 x 10^-3 M

What determines when a system reaches equilibrium? What observations can be made about a system once equilibrium has been established?

Answers

Equilibrium is achieved when the reaction rate of the forward and backward reaction are equal or the concentrations of the reactants and the products are in an unchanging ratio. Specifically, this system is in a dynamic equilibrium.

What does H2CO3 mean on the periodic table

Answers

Answer:

Carbonic acid

Best of luck
Carbonic acid........

Which correctly summarizes the trend in electron affinity? it tends to be very high for group 2
it tends to be more negative across a period
it tends to remain the same across periods
it tends to be more negative down a group

Answers

The answer is it tends to be more negative down a group. This is because as you go down the periodic table, the elements have more electron shells in their atoms. This makes the outermost shells less attracted to the nucleus due to their greater distances from the nucleus. Therefore, these shells are less likely to attract electrons (hence lower electron affinity) and are even more likely to lose electrons from their outer electron orbits.

Answer:

it tends to be more negative across a period

Explanation:

We have to remember that the periodic table is arranged accordingly to the number of electrons that the elements have in their outer valance shell, so the closer you are to the right of the periodic table the closer you get to the elements taht have the most electrons in their outer valance shells, this means that they have a greater negative electron affinity, which means that the elements on the right are more willing to gain an electron.

Why would a person could jump further on moon than on Jupiter?

Answers

In short, because the moon is smaller, its gravitational force is too. Therefore, if there is less gravity, it would be easier to jump further than on a bigger planet like Jupiter.

Explanation:
The Moon has less mass than the world, which implies it's less gravity than the world further.

Since the gravity is not propulsion on the U.S. as powerfully on the moon because it is on Earth, we are able to jump higher and with a lot of ease.
That's as a result of our muscles (and all alternative body elements concerned, like our bones and joints and heart and lungs) all were developed and conditioned to figure within the stronger gravity on the surface.
In short, because the moon is smaller, its gravitational force is too. Therefore, if there is less gravity, it would be easier to jump further than on a bigger planet like jupiter

A chemical manufacturer sells sulfuric acid in bulk at a price of $100 per unit. If the daily production cost in dollars for x units is: C(x)=100,000+50x+0.0025x^2, and if the daily production capacity is at most 7000 units, how many units of sulfuric acid must be manufactured and sold daily to maximize the profit?

Answers

to solve the amount of sulfuric acid to maximize the profitwe need to establish the profit

let S(x) = 100x the selling price

P = S(x) – C(x)

P = 100x – ( 100,000 + 50x + 0.0025x^2)

P = 50x – 100000 – 0.0025x^2

Getting the first derivative and equating it to 0

0 = 50 – 0.005x

X = 10000 units of sulfuric acid

But the capacity is only 7000 units

So 7000 units should be manufactured
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