Author Question: How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with ... (Read 215 times)

brutforce · **on:** Aug 27, 2018

How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with 7.73 g of water? Mg3N2 + 3H2O 2NH3 + 3MgO

A) 0.114
B) 0.0378
C) 0.429
D) 0.0756
E) 4.57

Question 2

Calcium forms an ion with a charge of ________.

A) 1-
B) 2-
C) 1+
D) 2+
E) 0

Question 3

Calculate the value of E in joules for a system that loses 115 J of heat and has 150 J of work performed on it by the surroundings.

A) -115 J
B) -35 J
C) +35 J
D) +265 J
E) -265 J

Question 4

The first ionization energies of the elements ________ as you go from left to right across a period of the periodic table, and ________ as you go from the bottom to the top of a group in the table.

A) increase, increase
B) increase, decrease
C) decrease, increase
D) decrease, decrease
E) The first ionization energies of the elements are completely unpredictable.

nothere · **Reply #1 on:** Aug 27, 2018

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