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Author Question: In the first melting point trial, a solid begins to melt at 55 C and is a clear liquid at 65 C. In ... (Read 69 times)

jlmhmf

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on: Aug 27, 2018
In the first melting point trial, a solid begins to melt at 55 C and is a clear liquid at 65 C. In
   the second trial, the solid begins to melt at 59.0 C and liquefies completely at 60.5 C.
 
  What is
   the precise melting point of the compound?
  A) 55 C
  B) 59.0 C
  C) 60.5 C
  D) 5565 C
  E) 59.060.5C

Question 2

Balance the chemical equation given below, and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 45.00 mL of 0.00150 M calcium hydroxide.
 
  ______ Ca(OH)2(aq) + ______ H3PO4(aq)  ______ Ca3(PO4)2(aq) + ______ H2O(l) A) 3.04 mL
  B) 15.0 mL
  C) 22.5 mL
  D) 33.8 mL

Question 3

How many moles are there in 120 g of glucose (C6H12O6)?
 
  A. 0.5 moles
   B. 0.67 moles
   C. 1.0 moles
   D. 1.2 moles


emsimon14

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

E)

Answer to Question 2

B

Answer to Question 3

B


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