Choose the best answer to the following. Explain

Introductory Chemistry 5
If the theoretical yield of a reaction is 24.8 g and the actual yield is 18.5 g, what is the percent yield?

Principles of General Chemistry 2
How many grams of phosphorus react with \(35.5 L\) of \(\mathrm{O}_{2}\) at STP to form tetraphosphorus decaoxide? \(\mathrm{P}_{4}(\mathrm{~s})+5 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{P}_{4} \mathrm{O}_{10}(\mathrm{~s})\) Equation Transcription: O2 Text Transcription:

Microbiology: An Introduction 11
Using the following information, create a dichotomous key for distinguishing these unicellular organisms. Which cause human disease?

Sears and Zemansky's University Physics with Modern Physics 13
Problem 26E A harmonic oscillator has angular frequency ? and amplitude A. (a) What are the magnitudes of the displacement and velocity when the elastic potential energy is equal to the kinetic energy? (Assume that U = 0 at equilibrium.) (b) How often does this occur in each cycle? What is the time

Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) 4
Dee is on a swing in the playground. The chains are 2.5 m long, and the tension in each chain is 450 N when Dee is 55 cm above the lowest point of her swing. Tension is a vector directed along the chain, measured in newtons, abbreviated N. What are the horizontal and vertical components of the tensio

Biology 8
The reactivity of an atom arises from a. the average distance of the outermost electron shell from the nucleus. b. the existence of unpaired electrons in the valence shell. c. the sum ofthe potential energies of all the electron shells. d. the potential energy of the valence shell. e. the energy diff

Anatomy & Physiology 1
Which of the formed elements arise from myeloid stem cells? a. B cells b. natural killer cells c. platelets d. all of the above

Physical Chemistry 8
A perfect gas undergoes isothermal compression, which reduces its volume by \(1.80\ \mathrm{dm}^3\). The final pressure and volume of the gas are 1.97 bar and \(2.14\ \mathrm{dm}^3\), respectively. Calculate the original pressure of the gas in (a) bar, (b) Torr.