All wavelengths/colours that are visible make up white light. From violet (between 380 nm and 450 nm) to red (between 400 nm and 700 nm).
Answer:
d 2,4,3
Explanation:
2 Al2O3 ----> 4 Al + 3 O2
Gas 2 because it has more particles that are colliding
Hydrogen has a +1charge and the whole thing has a +1charge so
(N)+4(H)=+1
and plug in H you get
(N)+4(1)=1 which means N has a charge of -3
If you use that set up for the rest you should be able to figure them out if there is no overall charge you just set it equal to 0
