Struggling with Basic Chemistry Concepts: Can You Help?

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    Beginner Chem
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Discussion Overview

The discussion revolves around basic chemistry concepts, particularly focusing on unit conversions and problem-solving related to speed and mass. Participants address questions posed by a student struggling with the application of these concepts in chemistry.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant notes that the student's first question is not a chemistry question, while the second question is also deemed to have little relevance to chemistry.
  • Another participant explains the formula for calculating time based on distance and speed, stating that Time = Distance/Speed.
  • A further contribution mentions the importance of understanding unit conversions, significant digits, and dimensional analysis in chemistry, suggesting that these are foundational concepts that will be necessary for future studies.
  • One participant inquires about the student's grade level, indicating a curiosity about the context of the questions.
  • A different participant expresses hope that the student will enjoy chemistry lessons once they grasp the importance of unit conversions.

Areas of Agreement / Disagreement

Participants generally agree on the importance of unit conversions and foundational concepts in chemistry, but there is no consensus on the relevance of the specific questions posed by the student.

Contextual Notes

The discussion highlights a potential gap in the student's understanding of how to apply basic mathematical concepts to chemistry problems, but does not resolve the appropriateness of the questions in a chemistry context.

starsun
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i have this chem teacher who does NOT teach from the book at all! he just expects us to read the book and understand it completely. so yeah i have a few questions that i can't do!

how long would it take a plane, traveling at an average speed of 634km/h, to cover a distance of 3912 km?

Determine the mass in grams of a hamburger that weighs 8.0 oz.

thanks!
 
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Your first question is not a chemistry question. Your second question has little to do with chemistry.

You should know that Time = Distance/Speed.

You should also know that 1 oz. = 28.35 g.
 
The first chapter is usually on non-chemistry basics, such as unit conversions, significant digits, etc.

Yes, speed = distance/time ... or you can rearrange the equation to find either of the other two missing variables.

You should have a chart (either in one of the appendices or on a handout) that shows conversions from metric to english or english to metric. You use the dimensional analysis to eventually arrive at the proper units.

For example: to go from meters/second to miles/hour you have to multiply by (1 mile/1609 meters) and by (3600 seconds/1 hour).

The conversion can be flipped either way (1609 meters/1 mile) since the numerator and denominator are equivalent (1609 meters = 1 mile). You choose which way to flip it depending upon which unit you want to cancel out.
 
Out of curiosity starsun, which grade is this for/are you in ?
 
Dear starsun, you have not started the real thing yet... I hope you'll like chemistry lessons after you understand these unit conversions, You will need them in the future, so don't be confused.

Regards, chem_tr
 

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