B 1,6,4 D 2, 10,8
Question 2
Magnesium ribbon burns in awyren with the fame to produce a white sold.
magnesium oxide.
2.1 is the reaction between magnesium ribon and anyen a PHYSICAL OF CHEMICAL
change? Give a reason for the answer
2.2 Write down a balanced equation for the reaction between magnesium and oxygen
2.3 Use the law of conservation of mass to show that mass is conserved during the re
In QUESTION 2.2
Question 3
ablet, with a mass of 0.25 g contains mainly calcium carbonate​

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Which of these best describes an ionic bond?