How does the law of conservation of mass apply to this reaction: mg + 2hcl + h2 + mgcl2?
a) the law of conservation of mass has already been applied.
b) only the hydrogen needs to be balanced.
c) hydrogen and chlorine needs to be balanced.
d) the equation needs to be balanced.

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

For each of the formulas, classify the formula as either an empirical formula, a molecular formula, or both. nahco3 empirical molecular both