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
Answer:
27.5
Explanation:
Divide 75 by 6. You get 12.5. Multiply 12.5 by 2.2 (when converting kilo to pound, you multiply by 2.2) Then, you'll get 27.5. The answer is 27.5 pounds/lbs.
Yes the answer is gene cloning the guy on top is right
The correct answer is: a. A field dominated by annual herbaceous plants.
This is because annual herbaceous plants (plants that have no persistent woody stem) die completely at the end of the growing season or after they have flowered and fruited. They will then grow again from seed.
Answer:
The internal structures disrupted by this chemical are probably VACUOLES.
Explanation:
A vacuole is a large membrane-bound vesicle in a cell's cytoplasm.
The central vacuole of a cell houses the digestive processes which includes chemicals that come to attack the cell; also it helps the cell regulates it's water concentration during changing environmental conditions.
vacuoles are present in the absorptive cells (enterocytes) covering the wall of the intestine
