Someone pls help with this. It's urgent

A is element

B is mixture

C is mixture

D is compound

E is compound

A - Compound

B - Compound

C - Element

D - Mixture

E - Mixture

Explanation:

A is a compound. Reaction with oxygen is called combustion and it yields new products which cannot be separated to give back its reactants. This is a property of compounds only

B is a compound. Compounds undergo decomposition and new products are formed, the original reactant can't be recovered.

C is an element. C has magnetic properties hence it is a metal and an element. Elements do not decompose into simpler forms

D is a mixture. It has 2 phases which are not homogeneous. Mixtures are easily separated into their individual components.

E is a mixture. Chromatography is a separation technique of mixtures

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b