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Author Question: All of the ________ have a valence shell electron configuration ns1. A) noble gases B) halogens ... (Read 171 times)

Frost2351

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on: Aug 27, 2018
All of the ________ have a valence shell electron configuration ns1.
 
  A) noble gases
  B) halogens
  C) chalcogens
  D) alkali metals
  E) alkaline earth metals

Question 2

How much heat is absorbed/released when 35.00 g of NH3(g) reacts in the presence of excess (g) to produce NO(g) and H2O(l) according to the following chemical equation? 4 NH3(g) + 5 O2(g)  4 NO(g) + 6 H2O(l) H = 1168 kJ
 
  A) 600.1 kJ of heat are absorbed.
  B) 600.1 kJ of heat are released.
  C) 2400 kJ of heat are absorbed.
  D) 2400 kJ of heat are released.

Question 3

How many moles of Na+ are present in 343 mL of a 1.27 M solution of Na2SO4?
 
  A) 0.436
  B) 0.871
  C) 1.31
  D) 3.70
  E) 11.1

Question 4

Compounds composed of a salt and water combined in definite proportions are known as ________.
 
  A) clathrates
  B) homogenates
  C) ionic solids
  D) molecular solids
  E) hydrates


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durant1234

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

D

Answer to Question 2

A

Answer to Question 3

B

Answer to Question 4

E


Frost2351

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Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


durant1234

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Reply #3 on: Aug 27, 2018
Great! Please up vote :D


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