Answer:
A hydrocarbon and oxygen
Explanation:
hydrocarbon is being burned, and oxygen is necessary to burn things
Answer:
B. Adding an enzyme to the reaction
D. decreasing the concentration of a reactant.
Concrete is formed of sand. Is it incorrect to suggest that some houses are built using concrete blocks?
Answer:
(a) An experiment was conducted, response variable is the concentrations of the chemical
Explanation:
According to Oxford dictionary; an experiment is; "a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact."
The aim of the entire study is to discover the concentration of a certain chemical at various depths of the river. This means that the entire procedure was undertaken for the purpose of discovery. Hence it is an experiment.
The independent variable here is the depth of the river while the response variable is the concentration of the chemical of interest at each depth.
A responding variable changes as changes are made in the independent variable. The variable that is manipulated in an experiment is the independent variable.
Elements that would have similar properties to Chlorine, would be any Elements in the same group.
So, Flourine, Iodine, Bromine, and Astatine all have similar properties.
