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The phosphate anion (PO4 ^3-) is common in minerals. The corresponding nitrogen-containing anion NO4^3, is unstable but can be prepared by reacting sodium nitrate with sodium oxide at 300 degrees C. Draw Lewis structures for each anion. What are the differences in bonding between these ions?
1. how small a change temperature can be detect by touch? how could smaller changes in temperature be detected?2. what
Arsenic Acid (H3AsO4) has Ka values of 2.5*10^-4, 5.6*10^-8, and 3*10^-13. What is the concentration of the HAsO42- dianion in a solution
The water level in the Carbon dioxide collection cylinder is higher than the water(H2O) level outside the cylinder.Is the wet carbon dioxide gas pressure greater or less than atmospheric pressure.
Mixed in a constant-pressure calorimeter, the temperature of the mixture rose from 21.15 to 26.00. If the density of the solution is 1.0g/mL and its specific heat is 4.18J/g C, how much heat is evolved by this reaction in kJ
The measured pH of the deionized water is very likely not 7, it will be slightly less.
One of the nuclides in spent nuclear fuel is U-235 , an alpha emitter with a half-life of 703 million years. How long will take for the amount of U-235 to reach 49.0% of its initial amount
If the copper is drawn into wire whose diameter is 7.50 , how many feet of copper can be obtained from the ingot? The density of copper is 8.94
Calculate the mass of sodium hydroxide that must be added to 1.00 L of 1.00 M HC2H3O2 to double the pH of the solution (assume that the added NaOH does not change the volume of the solution)
A 2.30-g sample of a large biomolecule was dissolved in 16.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
The density of Toluene (C7H8) is .867 g/mL, and the density o thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 10.5 g of thiophene in 250 mL of Toluene.
a cucu2 concentration cell has a voltage of 0.24 v at 25m . the concentration of cu2 in one of the half-cells is
what mass of KO2 in grams is required to react with 8.90-L of CO2 at 22.0 C and 767mm Hg? first calculate the number of moles of CO2 (R=0.08026 L*atoms/ mol*K) find moles of Co2 and mass of KO2 in grams?
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