A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus,a) what is the nuclear charge in this element. Why?b) what are the symbol and name of this element? How do you know?c) how many valence electrons does a neutral atom of this element have?d) how many […]
Which of the following hazards took the longest to reach residents living below the Mt. St. Helens volcano? Consider the distance , velocity , and way in which various hazards travel down the mountain and across the landscape .Which of the following hazards took the longest to reach residents living below the MT . St […]
Perhaps we are changing our normal gut physiology, replacing the bacteria that have been co-selected with us during evolution. Eventually, we are doing something even worse than modifying the pathogenic bacteria Modifying the normal saprophytic bacteria in alliance with human beings through evolution. Who knows what the implications of such changes are for human health? […]
A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Please draw the schematic MO diagram for the following types of ML6 trigonal prismatic complexes Derive schematic mo diagrams for the following types of ML . trigonalprismatic complexes .2 ) Sigma bonding only ( HI- , CH3" )b) Sigma and pi donor ligands ( CH30- , CI-, OH| 2 )C ) Sigma and pi donor […]
An element has two common isotopes. 98.89% of its atoms have an atomic mass of 12.09 amu, whereas the other 1.11% have an atomic mass of 13.10 amu. Using the isotopic composition provided, calculate the average atomic mass of the element.
what is the difference between an eyespot and an eye? A. the only difference is size; an eyespot is smaller version of an eye. B. An eyespot detects light but does not trigger a response; an eye does both C. An eyespot contains photoreceptors; an eye does not. D. An eyespot detects light but does […]
Analyze the two working models for understanding different health care systems and determine which model would be most useful to you in your current (or future) position in the health care industry. Provide specific examples to support your response.
You are given a cell line that differentiates into pigment cells when treated with the growth factor called “steel factor.” You suspect that steel factor regulates melanogenesis through a receptor tyrosine kinase. Although the receptor is not yet identified, you do by chance happen to have an antibody that when applied to the cells interferes […]
An ideal gas initially is allowed to expand isothermally until its volume is 2.66667 L and its pressure is 6 kPa. Then it is heated at constant volume until its pressure is 2 kPa. Calculate the work done by the gas. Answer in units of kJ.
