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When 2.50 g of sodium hydroxide (NaOH) was dissolved in 50.00 g of water a value of 9.50oC was obtained for ΔT
Calculate the molarity of the sodium hydroxide solution. =1.25
Calculate the value (calories) for the heat of solution of 2.50 g of NaOH=?
Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (ΔHsolnNaOH)=?
Sodium metal can photo-emit electrons. Make a plot of the kinetic energy of the photo-emitted electrons opposed to the frequency of the incident light as the frequency is varied across the transition of the sodium. Label you axes where photon ener..
what volume of nitrogen is is formed at 742 torr and 28.7dgree c by reacting 2.78 cm^3 of cu is density 8.95 g/cm^3 with 246ml of nitric acid ( 1.42g/cm^3) 68 %HNo3 by mass. Cu(s) + 4HNO3(aq)-------CU(NO3)2aq + 2NO2(g) + 2H2O(l). What is volume fo..
What is the nature of the forces of attraction in it. Explain in terms of their structures why each of the following pairs of substances have very different chemical and physical properties
Problem- What is the hybridization and polarity of the following formulas? H2CCHC*OCH3, H2SiO3, CN-. The questions are to be answered referring to the central atom. The * indicates the central atom for the first formula.
The combustion of the alternative fuel, hydrogen gas, released 286 kj per mole of hydrogen gas combusted. if 10.0 l of hydrogen gas at STP was burned to produce electricity, how long would it power a 100 watt light bulb. assume no energy is lost t..
assume that the wet limestone process requires 1 metric ton of caco3 to remove 90 of the sulfer from 4 metric tons of
Use two separate t tests to compare results from lab Coat with those from lab A and lab B at the 95% confidence level. Comments on the sensibility of the time test results.
A special gas mixture used in bacterial growth chambers contains 1.00% by weight CO2 and 99.0% O2 . What is the partial pressure (in atmospheres) of each gas at a total pressure of 0.966atm
The carbon atom model has an additional rotational axis of symmetry that is NOT threefold. Use an arrow to show the location of one of these in a figure of the carbon atom model.
A solution is made by combining 15.0mL of 16.5M acetic acid with 5.52g of sodium acetate and diluting to a volume of 1.50L Calculate the pH
(a) How many moles of potassium ions are in 272 g alum. (b) What is the mass % S in alum (to 3 significant figures). (c) What is the maximum amount of alum (in metric tons) that can be prepared from 16.7 metric tons of scrap aluminum (1 metric ton..
calculate the minimum volume of 1.10m cuso4 solution that is required to ensure complete reaction of 1.04g of fe. since
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