Answer:
1) A chemical reaction is shown.
SnO2 + H2 → Sn + H2O
What is true about this chemical reaction?
B.
It is unbalanced because the mass of the reactants (number of atoms) is greater than the mass of the products (number of atoms).
2) Read the information about an experiment.
Jadon plans on carrying out an experiment involving the burning of steel wool to illustrate the conservation of mass. Steel wool is made of iron. When it is burned it combines with oxygen to form iron(III) oxide.
Which step in his experiment is the most important if he wants his experiment to correctly demonstrate the conservation of mass?
A.
The steel wool should be burned inside of a sealed jar or other closed system.
Explanation:
The explanation to number 1 is that I selected it in my test and got it.
The explanation the number 2 is from the link below:
https://quizizz.com/admin/quiz/5dee60258f1145001bc02ed5/physical-science-2nd-9-weeks-practice-test-2020
Probably to not contaminate food or accidentally poison it.
Answer:
True:
"Stepping stones" are a type of corridor.
Explanation:
True, three types of the corridor can connect habitat clusters. The first one is called linear corridor and alludes to the line because it is a line. The second type of corridor is the landscape corridor which is a link of big sets of the material linked one to the other without a geometrical figure but creating a firm path. And finally, stepping stones corridors are composed of separated step stones that always keep distance one from the other.
