Looking at the periodic table, determine the charge of Sodium (Na) will make when it bonds with other atoms.
a
-1
b
-2
c
+1
d
-6
e
+6
f
+2
c) +1
Question 21
Which event is an example of an exothermic reaction?
a
melting ice
b
combustion
c
decomposition
d
evaporation
b) combustion
One molecule of Iodine (I2) and two molecules of sodium chloride (NaCl) combine in a reaction. How many atoms are in the products?
a
4
b
3
c
2
d
6
d) 6
Balance the following the chemical equation:
C2H6 + O2 → CO2 + H2O
Blank 1:
Blank 2:
Blank 3:
Blank 4:
The balanced equation is:
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Blank 1: 2
Blank 2: 7
Blank 3: 4
Blank 4: 6