Calculate Electron Charge in 0.6 kg of Water

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SUMMARY

The calculation of the total electron charge in 0.6 kg of water involves several steps. First, convert 0.6 kg to grams, yielding 600 g. Next, divide by the molar mass of water (18 g/mol) to find the number of moles, resulting in 33.3 moles. Multiplying by Avogadro's number (6.022 x 10^23) gives approximately 2.01 x 10^25 molecules. Each water molecule contains 10 electrons, leading to a total of 2.01 x 10^26 electrons. Finally, multiplying by the elementary charge (1.602 x 10^-19 C) results in a total charge of 3.21 x 10^7 C, which was reported as incorrect in the online homework system.

PREREQUISITES
  • Understanding of molar mass and conversions (e.g., grams to moles)
  • Familiarity with Avogadro's number (6.022 x 10^23)
  • Knowledge of elementary charge (1.602 x 10^-19 C)
  • Basic principles of molecular composition (e.g., number of electrons in H2O)
NEXT STEPS
  • Review the calculation of total charge using the formula Q = n * e, where n is the number of electrons and e is the elementary charge.
  • Investigate potential errors in the online homework system that may affect answer validation.
  • Explore the concept of significant figures in scientific calculations to ensure precision.
  • Learn about the implications of charge calculations in electrochemistry and related fields.
USEFUL FOR

Students in chemistry or physics, educators teaching electron charge calculations, and anyone involved in scientific problem-solving related to molecular structures.

Punchlinegirl
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You have 0.6 kg of water. One mole of water has a mass of 18 g/mol and each molecule of water contains 10 electrons since water is H2O. What is the total electron charge contained in this volume of water? Answer in units for C.

First I converted 0.6 kg to 600 g. Then I divided that by 18 to get the number of moles, which was 33.3. Then I multiplied it by Avogadro's number to get the number of molecules and got 2.01 x 10^25. Then I multiplied it by the number of electrons, and got 2.01 x 10^26. Finally, I multiplied it by the electon charge, 1.602 x 10^-19, and got 3.21 x 10^7. This isn't right.
Am I going about this in the right way?
 
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it seems fine to me.. why do you think it's wrong?
 
It's an online homework problem, and when I typed in the answer it said it was wrong... I have no idea why though... I don't know any other way to do it.
 

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