0.5 moles of calcium carbonate are decomposed by heating. What mass of calcium carbonate is this? You may need some of the information in the table.
Enter your answer as a number
g
Element
Relative atomic mass (Ar-)
I
1
12
O
16
No
23
Ca
40

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.