Hard question thx for the points
Answer:
Steel
Explanation:
I took a test and got this question right
-Pure magnesium is commonly made by separating it from seawater. This process is known as electrolysis. The liquid magnesium formed is cooled into convenient blocks of metal known as ingots. The chlorine gas is recycled to form hydrochloric acid for the production of more magnesium chloride.
Answer:
There are no options but the question can be answered based on general understanding of experimentation.
Group A: Control group
Group B: Experimental group
Explanation:
In an experiment, there are two groups viz: the control group and the experimental group. A control group is the group that does not receive any experimental treatment. It is considered the normal group while the experimental group is the group that is subjected to experimental treatment.
N.B: The experimental treatment in this case is the "Oxygen level"
According to the question, out of 20 petri-dishes used to grow bacteria, half (10) of the petri-dishes were placed in a container with normal atmosphere while the other 10 petri-dishes were placed in another container that have double the normal oxygen level. The first group of bacteria labelled GROUP A are the CONTROL GROUP because they were not given any treatment i.e placed under normal conditions while GROUP B are the EXPERIMENTAL GROUP because they are the group that received the experimental treatment (increased oxygen level).
Answer:
The answer to your question is letter B. conservation of mass
Explanation:
A.molecular changes I think there is no molecular changes law so this option is discarded.
B.conservation of mass This law states that the number of products is equal to the amount of reactants so if chemical equations are balanced, they satisfied this law.
C.conservation of energy This law states that the total energy in an isolated system remains constant and is different from the chemical equations so this option is discarded.
D.products and reactants are elements of a chemical reaction but they are not a law, so this option is discarded.