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
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