Which of the following sets of elements have the same number of valence electrons?
P, S, Cl because they are in the same period
B, Al, Ga because they are in the same group
Na, Ca, Ba because they are in the first two groups
Ag, Cd, Ar because they are transition elements and a noble gas
Answers: 1
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For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above
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Chemistry, 22.06.2019 21:30
Achemical reaction is done in the setup shown, resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?
Answers: 1
Which of the following sets of elements have the same number of valence electrons?
P, S, Cl because...
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