Please Help, In tears! Chem

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Hello, I am taking Fundamentals of chemistry this summer and I started today. I am already having problems with this class! The teacher goes speedy fast, and has no time to explain anything. I need to do well in order to apply for the nursing program. Please , I am begging and pleeding anyone and everyone to help.

I am having problems with the math part of chemistry. Example:

"A European car advertises an efficiency of 22 km/L, while an American car claims an economy of 30 miles/gal. What car is more efficient?"

OR

"If 168g of an unknown liquid requires 2750 cal of heat to raise it's temperature from 26 degrees celsius to 74 degrees celsius, what is the specific heat of the liquid?"

I am lost as to were to start on these problems. I need help,please anyone! Thanks so much!

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I see that allieinaz mentioned the cliffs study solver book. I agree, it was my saving grace in chemistry. I think I spent more time using it than my assigned text book. It is super helpful and explanatory. I would highly recommend purchasing that book. I bought mine used on amazon and only paid two dollars. Also, some libraries have this on the shelf.

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