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An optical fiber for something is made SiO2 glass (density = 2.2 Mg/m^3). How many Si atoms and how many O atoms are present per millimeter of length of a fiber 10 µm in diameter?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Calculate the total heat in joules needed to convert 25.00 g of ice at -3.50 degrees c to liquid water at 0.250 degrees c.
Express the following population estimates for the year 2010 in nanomoles of people. Asia, 4.15 billion people = _______ nmol The world, 6.83 billion people
What is the value of the equilibrium constant at 25 oC for the reaction between the pair: Mn(s) and Ag+(aq) to give Ag(s) and Mn2+(aq) Use the reduction potential values for Ag+(aq) of +0.80 V and for Mn2+(aq) of -1.18 V, E-notation with NO decima..
A perfect sphere of aluminum metal with a diameter of 4.56x10^-2 m reacts with 3.80L of 5.25M hydrochloric acid. the products are an aluminum chloride solution and hydrogen gas.
The Kb value for Hydrazine is 1.3x10^-6. What is the pH of the solution before any HCl has been added
Draw the six conformers in newman projection for the 60 degree intervals from 0 to 360 degrees for carbon atoms 3 and 4. Clearly show which carbon is represented by the "dot" and the "circle" Show which C
What is the buffer capacity of the resulting solution. (The buffer capacity is the number of moles of NaOH that must be added to 1.0 L of solution to raise the pH by one unit)
ammonia reacts with oxygen according tot he following equation4nh35o24no6h2o deltahrxn -906kjcalculate the heat in kj
At a certain concentration of reactants the rate of appearance of water in the following reaction is 0.43 M/s.
what mass of Cu is electroplated by running 20.0A of current through
Please complete and balance the molecular equation and write a net ionic equation, make sure to include the physical states of the compounds, if there is not reaction write NR for the products.
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