An electron has a charge ofA. –1 and the same mass as a proton
B. +1 and the same mass as a proton
C. –1 and a smaller mass than a proton
D. +1 and a smaller mass than a proton

How many valence electrons are in an atom of phosphorus?

a. 2
c. 4
b. 3
d. 5 Please select the best answer from the choices provided A B C D

There are five valence electrons are in an atom of phosphorus. The answer is letter D. 

The answer is "sea stack" or the fourth option. Sea stacks are tall pieces of land in the ocean that had been eroded all the way to look like a stack of rocks. Sea stacks look like this:

Hope this helps!

Answer:Concentration is a measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.

Explanation:

Final answer:

The temperature 120 K converts to -153°C. This conversion is made by subtracting 273.15 from the Kelvin temperature.

Explanation:

To convert Kelvin (K) to Celsius (°C), you subtract 273.15 from the Kelvin temperature. For example, 120 K becomes 120 - 273.15, equaling -153.15°C. Rounded, this is approximately -153°C. It's essential to note that 0 K is absolute zero, representing the lowest possible temperature, which corresponds to -273.15°C on the Celsius scale. Therefore, the correct answer is (1) -153°C. This conversion is fundamental in relating temperatures on the Kelvin and Celsius scales, where Celsius measures temperature relative to the freezing and boiling points of water, and Kelvin starts from absolute zero, the absence of thermal energy.

Learn more about Temperature Conversion

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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