48. What kind of reaction is this: Mg(s) + 2HI(aq) forms Mg12(s) + H2(g)

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Chapter1: Chemical Foundations
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48. What kind of reaction is this: Mg(s) + 2HI(aq)
forms Mg12(s) + H2(g)
A) single replacement B) neutralization C)
decomposition D) double replacement
E) combustion
49. What is the electron configuration for cobalt?
A) 1s22s22p63s23p64s23d7
B) 1s22s22p63s23p64s23d6
C) 1s22s22p63s23p63d7
D)
E)
1s22s22p63s23p64s23d4
1s22s22p63s23p64s13d6
50. Mg metal reacts with HCl to produce hydrogen gas:
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g). How many
grams of magnesium are needed to prepare 5.00 L of H2 at
735 mm Hg and 18 °C?
A) 4.91 g
B)
3.67 g
2.90 g
4.32 g
6.49 g
C)
D)
E)
Transcribed Image Text:48. What kind of reaction is this: Mg(s) + 2HI(aq) forms Mg12(s) + H2(g) A) single replacement B) neutralization C) decomposition D) double replacement E) combustion 49. What is the electron configuration for cobalt? A) 1s22s22p63s23p64s23d7 B) 1s22s22p63s23p64s23d6 C) 1s22s22p63s23p63d7 D) E) 1s22s22p63s23p64s23d4 1s22s22p63s23p64s13d6 50. Mg metal reacts with HCl to produce hydrogen gas: Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g). How many grams of magnesium are needed to prepare 5.00 L of H2 at 735 mm Hg and 18 °C? A) 4.91 g B) 3.67 g 2.90 g 4.32 g 6.49 g C) D) E)
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