For chemical reactions to occur we need to have two or more elements being combined depending on the expected end chemical product. The quiz below is on the measure of the relative quantities of the elements. Enjoy.
0.15
0.30
1.5
3.0
4.5
PbO2
H2O
K2SO4
PbSO4
Cr2(SO4)3
1.2n
4.5n
16n
18n
8.8g
9.0g
79g
79.2g
3.0 x 10^23
1.2 x 10^24
3.0 x 10^24
1.2 x 10^25
0.829L
0.830L
29.8L
29.9L
2.5L
10L
10.L
10.0L
8.26 x 10^22
3.67 x 10^23
8.26 x 10^23
3.67 x 10^24
9.39g
9.4g
93.9g
94g
13L
130L
1300L
13000L
2.59 x 10^23
2.6 x 10^23
5.18 x10^23
5.19 x 10^23
360 g
361 g
362 g
367 g
Wait!
Here's an interesting quiz for you.