Question

Spot the grammatical and punctuation errors in the following passage and rewrite it

correctly.

Chemical reaction, a process in which the reactants, (1) is converted to one or more different

products. The concept ( 2) in a chemical reaction dates back about 250 years. It had its origins in

early experiments that classified substances to (3) elements and compounds and in theories that

explained these processes. Chemical reactions must be distinguish (4) from physical changes.

Physical change include changes (5) of state, such as ice melting to water and water evaporating

to vapour. If a physical change occurs, the physical properties of a substance will change (6) but

its chemical identity will remain the same. No matter what its physical state, water H2O (7) is the

same compound, with each molecule composed of two atoms of hydrogen and

one atom of oxygen. (8) however, if water, as ice, liquid, or vapour, encounters sodium metal

(Na), (9) atoms will be redistributed to give the new substances molecular hydrogen (H2) and

sodium hydroxide (NaOH). By this, we know that a chemical change or reaction have (10)

occurred.​

Answer 1

Answer:

is conveted to one or more different products