PL ANSWER how does a balanced chemical equation represent the conservation of matter in a chemical reaction?

a. the type of matter in the products is different from the type of matter in the reactants.

b. there are more atoms in the reactants than in the products.

c. there are fewer atoms in the reactants than in the products.

d. the number of atoms of each element in the reactants equals the number of atoms of each element in the products.

Energy flows from the producer level to the level. is called

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.