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muminat
2 years ago
8

strontium-90 has a half life of 29 years. if a site held 4000 kg of this isotope, approximately what mass of strontium-90 would

be left after 87 years?
Chemistry
1 answer:
Ludmilka [50]2 years ago
4 0

Answer:

125g

Explanation:

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The circles in the diagrams below represent energy levels in an atom, and the arrows show electron (blue dot) transitions from o
Hoochie [10]
Ranking of the atom from highest to lowest is as follows:
Highest
Arrow = from outer edge to center
2nd Highest
Arrow = second closest ring to the outer edge to center
3rd Highest
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6 0
3 years ago
Identify the chemical symbols corresponding to each element. drag the appropriate labels to their respective targets.
Shalnov [3]

The name and chemical symbol of the elements are

  • Carbon = C
  • Lead = Pb
  • Antimony = Sb
  • Sodium = Na
  • Aluminum = Al

<h3>What are chemical symbols?</h3>

Chemical symbols are which are used to represent the elements in the periodic table.

The chemical symbol assigned to elements are usually an abbreviation of the name of the element or the Latin form of the name.

The name and symbol of the given elements are as follows:

  • Carbon = C
  • Lead = Pb
  • Antimony = Sb
  • Sodium = Na
  • Aluminum = Al

The chemical symbols are used frequently in writing the formula of compound formed from the elements. For example, the compound sodium aluminate which contains sodium, aluminum and oxygen is written in a simplified form as: NaAlO₂.

Learn more about chemical symbols at: brainly.com/question/118939

#SPJ1

Note that the complete question is given below:

Part A

Identify the chemical symbols corresponding to each element Drag the appropriate labels to their respective targets.

View Available Hint(s)

Element

Carbon

Lead

Antimony

Sodium

Aluminum

8 0
1 year ago
A compound with a total of four carbons. A straight chain across the bottom of three carbons with all single bonds. There is a m
AleksandrR [38]
I know the answer. It is 2 straight chains. lLOL
6 0
3 years ago
How many moles of C2H6 in 3.754 x 1023 molecules of C2H6?
ira [324]

Answer:

n=N/NA

n= 3.754×10²³/6.02×10²³

n= 6.24 s

Explanation

since there is number of molecules, make use of Avogadro's constant to get number of moles.

5 0
2 years ago
Concentrated hydrochloric acid is approximately 12.2 M. If a student needs to prepare 250. mL of 0.500 M hydrochloric acid, what
Mice21 [21]
Answer:
Would it be 10.2 mL? I used the formula M1V1=M2V2
Explanation:
I think the person that asked it correct

5 0
1 year ago
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