Answer:
The molecular formula lists the symbol of each element within the compound followed by a number (usually in subscript). The letter and number indicate how many of each type of element are in the compound. If there is only one atom of a particular element, then no number is written after the element.
You can infer that the different elements have different light spectrum frequencies, causing the different light colors.
Answer:
I think the correct answer is C.
Let us first investigate the volume effects. From the ideal gas equation, we know that pressure and volume are inversely proportional. The rate of reaction would be faster if the volume is smaller which makes the pressure higher. So, a volume of 2.01 is more favorable than 4.01.
Next, we have to know the enthalpy of reaction. For this reaction, it is ΔH = -28 kJ. For a negative enthalpy, it would favor the higher temperature. Therefore, the order of rates of reaction is:
1.B
2.A
3.C
4.D