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Question:

What is the oxidation state of the chlorine atom in HCl?

A −1
explanation

Hydrogen (H) always has an oxidation number of +1. To create a neutral molecule, the chlorine (Cl) must then have an oxidation number of −1.

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opuskeen

4 years ago

I recommend this app 100%

Zatara_

4 years ago

Used this app for 2 weeks to study. I took the teas 11/23/20. It did have one question on my exam about the vas deferens and vasectomies on this app which was nice, but other than that not very similar. The teas exam format is much more complex and requires more critical thinking than this app. After completing all the questions on the app you can take practice exams. My results on all 6 or 7 exams (170 questions each) were 89-94%. I have a 4.0 science pre req, 3.6 overall, and bachelors degree. I received a 70% on the teas after using this app as my primary study source. This app just won’t prepare you for the caliber of questions you’ll face on the real exam. Overall a good source of material and will help for studying, but don’t rely on this app too heavily.

NarutoLeafVillage

3 years ago

I just took my exam and earned a 88.7%. This app has helped me practice and apply the knowledge I’ve learned while studying for the TEAS. I like how the app is formatted and it feels like a game rather than studying which helped motivate me and I enjoyed it. I don’t usually write reviews, but I think this app deserves it. Although I wasn’t able to save some of the questions using the “favorites” option, it didn’t bother me too much and I learned a lot from the app anyway. If you’re gonna take or retake the TEAS, I absolutely recommend this app. Don’t rely solely on it though, atleast find another study material to go through and use the app just for that extra practice (atleast that’s what worked for me). I hope this helped someone today and good luck btw!

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