1. Use the following equation to answer the questions below. CH4 (9) + 202 (9) — CO2 (g) + 2H20 (9)
1. What type of reaction is this? Why do you say it is this type of reaction?
Support your claim with evidence. (2 points, 1 point valid type of reaction, 1
point valid evidence)
2. What is the mole ratio of methane to water in the reaction? (1 point correct
mole ratio)
3. How many moles of water are produced from the reaction of 50.0g of
methane (CH4)? Show your work (2 points, 1 point valid answer, 1 point valid
work)

Does the energy in a solid increase or decrease when changing to a liquid?

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.