Ajeweler is making sapphire rings using 2 sapphires on every 1 ring. if the jeweler has 12 sapphires and 10 rings, what is the theoretical yield? a. 5 sapphire rings b. 6 sapphire rings c. 10 sapphire rings d. 12 sapphire rings

For every one ring he uses 2 sapphires. The jeweler has with him 12 sapphires and 10 rings, we have to find how many sapphire rings he can make with it.

There are 12 sapphires

so if 2 sapphires make 1 ring

then 12 sapphires make -- 1/2 x 12 = 6 rings

therefore altogether he can make 6 sapphire rings

answer is B.

b) mutualism

hope this : )

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.