Basic Chemistry Homework Help
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For some reason, I cannot understand this problem:
An 18 karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper.
A. What is the mass, in grams of the necklace if it contains 0.24 oz of silver.
The correct answer is:
43g of 18-karat gold.
But I cannot wrap my head around how this was answered, please walk be through the steps.
Thanks for your help
Rejected: Peer Reviewers on Strike
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Peer review is the evaluation of work by one or more people of similar competence to the producers of the work (peers.) It constitutes a form of self-regulation by qualified members of a profession within the relevant field (from wikipedia).
So far, so good. However, peer-reviewing, in many scientific professions, is a free service that is mostly performed by scientists on short-running positions, who do not have any time to waste on their peer's garbage. This renders the peer-reviewing process to have very low quality, and as a result a large proportion of scientific articles are not worth reading.
We want to help fixing this system. We demand a comprehensive scheme of compensation for peer reviewing. Quality control must not be an act of charity: it needs to be recognized as a valuable part in the academic process.
Join the process.
Where did I go wrong?? Lol.
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I did the math... I the votes are coming, we will not reach the goal of 500k votes... My calculations show 1 vote per 10 seconds from 421,470 Votes. Too reach 500k votes, you would need too subtract, 421,470 from 500k = 78530. Now Per 10 seconds = 1 vote. 42147 / 10 = 42147. Now we can divide that by the 1(hour), which will become our prediction. 42147 / 60 = 702.45. Now we can see It will take 702.45 hours for 500k votes. Lets shorten it by days! 702.45 / 24(Hours) = 29.268 Days!
I know this is wrong, but please show me how too solve this. My head will explode if I don't learn. I literally out of the blue became interest in this type of math lol.