Question

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

Answer 1

Question 21
Which event is an example of an exothermic reaction?

a
melting ice
b
combustion
c
decomposition
d
evaporation

Answer 2

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

Answer 3

Balance the following the chemical equation:

C2H6 + O2 → CO2 + H2O

Blank 1:
Blank 2:
Blank 3:
Blank 4:

Answer 4

c) +1

Answer 5

b) combustion

Answer 6

d) 6

Answer 7

The balanced equation is:

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

Blank 1: 2
Blank 2: 7
Blank 3: 4
Blank 4: 6