Answer : In the reaction of Ca +

--->Ca

, the coefficient of Ca and

will be the same which will be 1.
Explanation : As per the rules of writing a chemical equation and balancing it properly, the number of elements in reactants side should be equal to the number of elements generated in product side. Hence when we use 1 molecule of Ca and one molecule of

then it generates 1 molecule of Ca

.
dont know what the web looks like but mushrooms are decomposers
This sounds like paper chromatography. Let me know in the comments if the answer is something else.
The answer is no because producers need the energy from the sun in order to produce. Hope this helped!
True <span>Nuclear energy is made from the element carbon</span>