A nurse plans to five flu injections of 50 uL (microliters) each from a bottle containing 2.0 mL of vaccine. How many doses are in the bottle? Please show steps to get answer.
A water tank leaks water at the rate of 3.9 mL/h. If the tank is not repaired, what volume of water in liters will it leak in a year? Show work and setup.
A 6.0 ft person weighs 168 lbs. Express this person's height in meters and weight in kilograms. (1 lb = 453.6 g 1 m = 3.28 ft.)
The following ions all have the same number of electrons: See attached file for full problem description. Order them according to their expected size, and explain answer.
What are the likely ground-state electron configurations of the following anions? a) Se 2- b) N 3-
Write a balanced chemical equation, for the reaction that occurs, when Solid barium hydroxide, dissolves in water. Thank you
The vapor pressure of a solution containing 53.6 g glycerin (C3H8O3) in 133.7 g ethanol (C2H5OH) is 113 torr at 40 degrees Celsius. Calculate the vapor pressure of pure ethanol at 40 degrees Celsius assuming that glycerin is a nonvolatile, nonelectrolyte solute in ethanol.
Determine the molecular formula of the oxide of phosphorous when it is in its gaseous state. Temp 200C, pressure 760mmHg, mass 0.568g, volume 99.5cm3
1) Radioisotopes such as aluminum -26, which is believed to have been present in the solar system when earth was formed but can no longer be detected, are known as extinct radionuclides. The half-life for the decay of aluminum -26 is 7.20 x 10 ^5 years. How many years did it take for 99.99% of the aluminum -26 to decay? If
Cis-Co(en)2(NO2)2]+ trans-[Pt(NH3)3Cl3] I know that trans means opposite, cis and en I am not sure what that means but for some reason I am unable to identify the above complexes.
What are element compounds and what are their properties? - Definition of element compounds - Properties of element compounds - Examples of element compounds - What element compounds are used for
The solubility product of Ca(OH)2,is 7.9x10^-3 at 25C. Will a precipitate form when 100ml of 0.10 mol/L of CaCl2 solution and 50.0 ml of 0.070 mol/L of NaOH solution are combined?
What is the de Broglie wavelength of a 145 g baseball traveling at 30.0 m/s (67.1mph)? Is the wavelength much larger or smaller than the diameter of an atom (on the order of 100 pm)?
At its closest approach, Mars is 56 million km from Earth. How long would it take to send a radio message from a space probe of Mars to earth when the planets are at this closest distance?
Calculate molar solubility of CuI in 1.0 M NaI. Assume the highest complex formed is CuI2 - .
Solid Na2SO4 is added to a solution that contains 0.150 M Ba 2+ and 0.0800 M Ca2+. Which sulfate precipitates first, BaSO4 or CaSO4? What calculations would porve this? What should be the concentration of sulfate ion for the best separation?
Calculate boiling point and freezing point - assume complete dissociation of ionic compounds: a) 0.15 M NaCl b) 0.15 M FeCl3
The frequency of red light is 4.57 x 10^14 sec-1. Calculate its wavelength in nanometers.
For the hydrogen spectrum, how do you find the wavelength (experimental value in nm) from a graph? I don't understand what exactly you are plotting and how to get the wavelength from the graph. For example, if your scale readings are: Violet-4.5, Blue-5.0, Yellow-6.0, Red-6.6 The same question applies to the spectra of cat
The question goes like this. Boron often forms compounds that do not comply with the octet rule that are termed electron deficient. BF3, whose structure is shown below on the left, is an example of an electron deficient compound. Note that the central boron atom is only surrounded by 6 valence electrons. The resonance struct
Please see the attached file for full problem description. 10a. Determine the number of CH2CH2 monomeric units, n, in one molecule of polyethylene with a molar mass of 40,000 g. 10b. What is the total number of carbon atoms in this polyethylene? 8. Equations 9.1 and 9.2 (listed below) show the polymerization of two ethy
Na(s)+ H2O = Na<+> + H2
Calculate the concentration of all the following. A solution of FeCl3 was prepared by dissolving 13.86 gm of FeCl3 in 2.5L of water. The following solutions were then prepared by dilution: Solution A: 75.0 mL of the above solution was diluted to 100.0mL Solution B: 100.0 mL of solution A was diluted to 2500 mL Solution C:
If 7.85 x 10 to the 24th power Sc atoms react with excess CaO, how many grams of each product will form? You will need to determine the equation of the reaction. Please show steps to solve the problem. Thank you.
A nonelectrolyte solution adsorbs on an electrically neutral solid through a liquid. Two surfaces of this type are brought close to one another in the liquid such that they interact. Will they attract or repel one another? Which equations bear this out? How does the separation distance between the two solids come into play h
Questions 9 - 11: a) COsub3^2- b) MnOsub4^- c) NHsub4^+ d) Ba^2+ e) Al^3+ Assume that you have several unknowns each consisting of an aqueous solution of a salt that contains one of the ions listed above, which ion must be present if the following observations are made of that unknown? 9) the solution is colore
I need help describing an experiment where one could measure the value of the extinction coefficient of a solution with a concentration (c mol/L) of chlorophyll in water for a given wavelength. **This does not need to be a lengthy answer, nor does it need to describe all the materials needed---I really just need something conce
A) How many electrons in an atom can have the designation 6d?
1) How many significant figures are there in the answer to the following problem? (8.881*.02100) + .590? 2) A parsec is 206,265 times the distance from earth to the sun. If the distance is 8.000 million miles, express the distance of a parsec in miles in scientific notation.