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3 years ago

I think it’s b but I’m not sure

Chemistry

2 answers:

brilliants [131]3 years ago

6 0

I’m pretty sure it’s be as well

suter [353]3 years ago

4 0

Yes that’s correct it is B

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How abundant is Polonium in the earth's crust?

artcher [175]

Even in pitchblende, polonium is exceedingly rare: 1,000 tons of ore must be treated to yield 40 milligrams of polonium. It has a one-part-in-ten-thousandth-thousandth-thousandth-thousandth-thousandth-thousandth It is found in nature as a byproduct of the radioactive decay of uranium, thorium, and actinium.

Atomic Number: 210

3 0

3 years ago

How many moles of sodium chloride are produced from 3.5 moles of sodium carbonate

Ede4ka [16]

Answer:

3 moles

Explanation:

6 0

3 years ago

According to Le Chatelier's principle, what happens to the equilibrium constant (K) when the concentration of the reactants is d

slavikrds [6]

Answer:

The value of the equilibrium constant (K) remains the same.

Explanation:

A state of dynamic equilibrium is said to have been achieved in a reaction system when the rate of forward reaction equals the rate of reverse reaction.

At equilibrium, doubling the initial concentration of reactants have no effect on the equilibrium constant K. The equilibrium will rather shift to the left or right as required in order to annul the constraint.

5 0

3 years ago

Read 2 more answers

1. The average temperature in Addis Ababa, during the summer, is about 25°C. What is the equivalent Kelvin temperature?

baherus [9]

Answer:

25 + 273= 298k.

Explanation:

I guess it's correct answer

4 0

2 years ago

Carbon monoxide (CO) is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentratio

velikii [3]

<u>Answer:</u> The amount of CO that is occupied in the room is $1.98\times 10^3L$

<u>Explanation:</u>

We are given:

Concentration of CO = $8.00\times 10^2ppm=800pm$ by volume

This means that $800\mu L\text{ or }800\times 10^{-6}$ of CO is present in 1 L of blood

To calculate the volume of cuboid, we use the equation:

$V=lbh$

where,

V = volume of cuboid

l = length of cuboid = 10.99 m

b = breadth of cuboid = 18.97 m

h = height of cuboid = 11.89 m

$V=10.99\times 18.97\times 11.89=2478.83m^3$

Converting this into liters, by using conversion factor:

$1m^3=1000L$

So, $2478.83m^3=2.479\times 10^6L$

Applying unitary method:

In 1 L of blood, the amount of CO present is $800\times 10^{-6}$

So, in $2.479\times 10^6L$ of blood, the amount of CO present will be = $\frac{800\times 10^{-6}}{1}\times 2.479\times 10^{6}=1983.2L=1.98\times 10^3L$

Hence, the amount of CO that is occupied in the room is $1.98\times 10^3L$

8 0

3 years ago