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Sophie [7]
3 years ago
5

The population of the Earth at the end of 2018 was approximately 7.7 × 10 9 people. Which of the following is the correct way of

representing this number?
Chemistry
1 answer:
stepladder [879]3 years ago
5 0

Answer:

7700000000

Explanation:

so 7.7 x 10 to the power of 9 is in standard form

to put it into a number you just need to times it by 1000000000

however your answer will only have 8 zeros because of the decimal point

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An electron ______ is an area around the nucleus of an atom where an electron is likely to be found.
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orbital

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Which is the first element in the periodic table to have an electron configuration in the 4th energy level?
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3 years ago
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4 b + 3 o2 → 2 b2o3 if 8 moles of b and 4 moles of o2 are allowed to react, how many moles of b2o3 can be formed?
raketka [301]

The number of moles of  b2o3 that will be formed is determined as 4 moles.

<h3>Limiting reagent</h3>

The limiting reagent is the reactant that will be completely used up.

4 b + 3O₂ → 2b₂O₃

from the equation above;

4 b ------------> 2 b₂O₃

2b ------------> b₂O₃

2 : 1

3O₂  -------------> 2b₂O₃

3  :  2

b is the limiting reagent, thus, the amount of b2o3 to be formed is calculated as;

4 b ------------> 2 moles of  b2o3

8 moles -------> ?

= (8 x 2)/4

= 4 moles

Thus, the number of moles of  b2o3 that will be formed is determined as 4 moles.

Learn more about limiting reactants here: brainly.com/question/14222359

#SPJ1      

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1 year ago
Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL vol. pipet with a few drops and then pipet exactly 1.0
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Answer:

The color of the solution turned a clear brown sort of a copper color

Explanation:

The color of the solution turned a clear brown sort of a copper color.

This is because ASA and the FeCl3 are reacting in a manner that it is resulting in the creation of a metal.

4 0
3 years ago
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