Why is it important to differentiate elements and compounds?

Answers

• Réponse publiée par: lhadyclaire

  answer:

  because it's needed

  Explanation:

  easy as tht
• Réponse publiée par: aimeedelacruz24

  Hello!

  I have 345 mL of a 1.5 M naCl solution if i boil the water until the volume of the solution is 250 mL what will be the molarity of the solution?

  We have the following data:  

  M1 (molar concentration or initial molarity) = 1.5 M

  V1 (solution volume or initial volume) = 345 mL

  V2 (solution volume or final volume) = 250 mL

  M2 (molar concentration or final molarity) = ? (in M  )

  Using the concentration dilution formula, we have:

  

  

  

  

  

  

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• Réponse publiée par: sherelyn0013

  It is stated that 1 atm = 760mmHg = 760 torr = 101.325kPa so now we can convert the given pressure to the following units using dimensional analysis.

  A. 99.8kPa to mmHg

  101.325kPa = 760 mmHg

  so 99.8 kPa x (760mmHg / 101.325kPa)

  =748.56mmHg

  B. 99.8kPa to torr

  101.325kPa = 760 torr

  99.8kPa x (760torr/ 101.325kPa)

  =748.56torr

  C. 99.8kPa to atm

  1 atm = 101.325kPa

  99.8kPa x ( 1 atm/ 101.325kPa)

  =0.98 atm