why is it important to use the correct number of significant digits when reporting the results of an experiment

A skillet is lined with a thin layer of cooking oil followed by a layer of unpopped popcorn kernels. Upon heating the kernels all pop thereby escaping the skillet. Which of the following physical and/or chemical changes occurred?

Which of the following coenzymes participate in the reactions of the pyruvate dehydrogenase complex? A) Thiamine pyrophosphate (TPP) B) Lipoic acid (lipoamide) C) Flavin adenine dinucleotide (FAD) D) Nicotinamide adenine dinucleotide (NAD+) E)

Which bond is strongest and why? a. C=C C=N C=O C=S

Commercially available aqueous nitric acid has a density of 1.42 g/mL and a concentration of 16 M. Calculate the mass percent of HNO3 (molar mass = 63.01 g/mol) in the solution.

Along the right side of the page there are links to various data tables. You receive a fax with a data table labeled "U. S. Laboratory Confirmed Influenza-Associated Hospitalizations and Deaths.

What organelle does the process of cellular respiration?

How much heat is absorbed during production of 127 g of NO by the combination of nitrogen and oxygen? N2 (g) + O2 (g) →2NO (g), ΔH = + 43 kcal/mol

Which of the following is the result of the process that binds many amino acids on to another? a. protein b. allele c. dna d. rna

What does the electron transport chain do to the concentration of hydrogen ions (protons) ?

What is the cation name for alcl3?