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A student reacts calcium carbonate with hydrochloric acid. Design an experiement that would allow the student to determine the rate of reaction. Draw the set up.

The reaction between calcium carbonate and hydrochloric acid produces carbon dioxide. The carbon dioxide could be collected in a gas syringe or in a measuring tube inverted and filled with water. The rate of...
KA
Answered by Katy A. • Chemistry tutor
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Name and briefly describe the function of three organelles possessed by a plant cell. State an organelle that is present in a plant cell but not in an animal cell.

Plant cells possess a membrane bound nucleus that acts as the control centre of a cell. They also possess a vacuole which controls water balance in the cell. The chloroplasts are the site of photosynthesis a...
KA
Answered by Katy A. • Biology tutor
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How do antibodies work?

Foreign cells that enter the body have antigens on the outside of them which will be complementary to a specific antibody. The antibody can bind to the antigen, forming an antigen-antibody complex, and this ...
LB
Answered by LORNA B. • Biology tutor
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introduce the romantic movement in the italian literature of the 18th century

The romantic movemet was a cultural trend developed during the 18th century in Germany and then it spreaded all around Europe. It was based on the expression of the deep feeling of the author and his connect...
CF
Answered by Camilla F. • Italian tutor
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Explain why C-12 and C-14 are isotopes of Carbon. (3 marks)

Same number of protons (6 protons - atomic number) and different number of neutrons (6 neutrons in C-12 and 8 neutrons in C-14).
CS
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