Calculate Phosphorus Atoms in 8.75 Moles of H2P2O7 | Stoichiometry Help

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Discussion Overview

The discussion revolves around calculating the number of phosphorus atoms in 8.75 moles of H2P2O7, focusing on stoichiometry and mole concepts. Participants seek assistance in understanding the steps necessary to arrive at the solution.

Discussion Character

  • Homework-related, Mathematical reasoning

Main Points Raised

  • One participant asks how many phosphorus atoms are in 8.75 moles of H2P2O7 and expresses uncertainty about where to start.
  • Another participant suggests beginning by determining how many atoms are in one mole of phosphorus atoms.
  • A participant explains that 8.75 moles of H2P2O7 contains 2x8.75 moles of phosphorus, indicating the stoichiometric relationship.
  • A similar explanation is reiterated by another participant, emphasizing the concept of particles per mole.
  • A later reply expresses gratitude for the explanation, indicating it helped the participant arrive at the correct answer and highlighting the importance of understanding this problem for their exam.

Areas of Agreement / Disagreement

Participants generally agree on the approach to solving the problem, with one participant confirming that the explanation provided was helpful in reaching the correct answer. However, the initial uncertainty expressed by the first participant indicates that not all aspects of the problem were clear to everyone.

Contextual Notes

The discussion does not clarify specific assumptions regarding the understanding of mole concepts or the application of stoichiometry, which may affect the interpretation of the problem.

Who May Find This Useful

This discussion may be useful for students preparing for exams in chemistry, particularly those focusing on stoichiometry and mole calculations.

sweetshelly
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This is the question:
How many phosphorus atoms are contained in 8.75 moles of H2P2O7? Put your answer in E-format with 1 number before and 2 numbers after the decimal place. e.g., 6.02 x 1023 would be input as 6.02E23.



the answer is : 1.05E25 (1.05 × 1025)

I really have no idea where to start. Please someone help me
 
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To start off, how many atoms are there in 1 mole of phosphorus atoms?

This link should aid your understanding.
http://www.fordhamprep.org/gcurran/sho/sho/skills/moleconex.htm
 
Last edited by a moderator:
You've been given 8.75 moles of H2P2O7, which contains 2x8.75 moles of H, 2x8.75 moles of P, and 7x8.75 moles of O. In one mole of anything (H2P2O7, P atoms, eggplants, etc), there are 6.02E23 particles.
 
kinthos said:
You've been given 8.75 moles of H2P2O7, which contains 2x8.75 moles of H, 2x8.75 moles of P, and 7x8.75 moles of O. In one mole of anything (H2P2O7, P atoms, eggplants, etc), there are 6.02E23 particles.

wow thank you so much. This explanation gave me the correct answer. I really appreciate your help a lot. This is part of our exam review. If I didn't know how to solve this problem I would miss it. I can't afford not knowing something b/c we only have 20 questions total. I need an A on tomorrow test to make an A average for the semester. You're the greatest :smile: :smile: :smile: :smile:
 

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