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Author Question: A commonly used abrasive that is NOT used in toothpaste is A) sugar. B) calcium carbonate. C) ... (Read 70 times)

tth

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  • Posts: 579
on: Aug 27, 2018
A commonly used abrasive that is NOT used in toothpaste is
 
  A) sugar.
  B) calcium carbonate.
  C) calcium hydrogen phosphate.
  D) calcium pyrophosphate.

Question 2

A gasoline with an octane rating of 90 would give the same performance in a standard test engine as a mixture of
 
  A) 90 isooctane and 10 heptane.
  B) 90 heptane and 10 isooctane.
  C) 90 parts isooctane and 90 parts heptane.
  D) 90 parts isooctane and 90 parts water.


deja

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

A


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