When an ice cube melts in your hand, it changes from a solid to a liquid.
H2O (s) → H2O (l)
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When an ice cube melts in your hand, it changes from a solid to a liquid.
H2O (s) → H2O (l)
This is an example of _ reaction, because heat is _ the system.
a. endothermic; leaving
b. exothermic; entering
Selected: c. exothermic; leavingThis answer is incorrect.
d. endothermic; entering
Which situation would react faster and why?
a. Example B would be faster because of a high surface area.
b. Example A would be faster because of a high surface area.
Selected: c. Example A would be faster because of a low surface area. This answer is incorrect.
d. Example B would be faster because of a low surface area.
Balance the following the chemical equation:
_ Ti3N + _ MgO → _ Mg3N2 + _ Ti2O
Balance the following the chemical equation:
_ Incorrect. Ti3N + _ Incorrect. MgO → _ Incorrect. Mg3N2 + _ Incorrect. Ti2O
Balance the following the chemical equation:
_ N2 + _ O2 → _ NO
Balance the following the chemical equation:
N2 O2 → NO
Looking at the periodic table, determine the charge each atom will make when it bonds with other atoms.
Calcium (Ca)
2.
Francium (Fr):
Francium (Fr)
3.
Bromine (Br):
Bromine (Br)
4.
Sulfur (S):
Sulfur (S)
5.
Xenon (Xe):
Xenon (Xe)
6.
Carbon (C):
Carbon (C)
7.
Phosphorous (P):
Phosphorous (P)
8.
Boron (B):
Boron (B)
Column B
a. -1
b. -3
c. +4/-4
d. +3
e. +1
f. -2
g. 0
h. +2
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