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vesna_86 [32]
3 years ago
8

Choose all that apply. Which of the following are not considered to be elements essential for life?

Chemistry
2 answers:
Basile [38]3 years ago
8 0
Al, Si, Mg
 All other elements seem more necessary in life

Advocard [28]3 years ago
4 0

aluminum and silicon are not essential for life

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A beaker contains 0.125 L of a 3.00 M solution. If the volume goes up to 0.325 L, what is the new molarity?
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Answer:

1.15 M

Explanation:

Step 1: Given data

  • Initial volume (V₁): 0.125 L
  • Initial concentration (C₁): 3.00 M
  • Final volume (V₂): 0.325 L
  • Final concentration (C₂): ?

Step 2: Calculate the final concentration of the solution

We want to prepare a dilute solution from a concentrated one by adding water. We can calculate the concentration of the dilute solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁/V₂

C₂ = 3.00 M × 0.125 L/0.325 L = 1.15 M

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How many moles of CH4 are in 148.6 g? Round your answer to two decimal places.
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9.29 mol

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