If an equation has only one reactant it is a reaction. A. Synthesis
B. Decomposition
C. Double replacement
D. Single replacement
E. Combustion

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

the dependant variable is spilled water

the independent is the heat

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer