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Why is the earth widest at the equator and narrower near the poles? Earth spinning on its axis. Outward centrifugal force is greatest at equator (outward horizontal) and less as we go towards poles.
The Ka for H2PO4 is 6.3 x 10-8. The Ka for Hs- is 1.3x10-13. Both are amphoteric substances. What does amphoteric mean? Use 2 PO4- to illustrate the definition
Explain what observable patterns, if any are there in the heat behavior of chloride vs. nitrate salts and 1 monovalent cation vs. 2 cation divalent salts
calculate the minimum number of grams of propane that must be combusted to provide the energy necessary to convert 5.35
For each of the subsequent reactions identify the Bronstead-Lowry acid, base and their conjugate base and acid
What temperature is required to contain gas in a 525 mL flask at 1.23 atm if it originally occupied 555 mL at 755mmHg and 18 degrees celcius
1. the volume of an ideal gas is 2.06l and standardtemperature and pressure. caculate the volume at 1.75atm and
A compound found in ancient Egyptian cosmetics has the formula Pb2Cl2CO3. If a sample of this substance contains 5.83 x 1021 molecules of this substance, how many moles are present, and what is the mass, in milligrams, of this sample?
An unknown metal is determined to be arranged in an fcc structure. Explain the density of the metal is 11.3g/cm3 as well as the edge cell length is 495 pm find out the molar mass of the metal. Define what the metal is
The Heat of vaporization delta Hvap of carbon tetrachloride (CCl4) at 25C is 39.4 kJ/mol. If 1 mol of liquid carbon tetrachloride at 25C has an entropy of 216 J/K, what is the entropy of 1 mol of the vapor in equilibrium with the liquid at this te..
Find N-H bond energy in ammonia using the standard enthalpies of formation N(g)=472,7kJ/mol, H(g)=216.0kJ/mol, NH3(g)=-46.1kJ/mol
According to VSEPR theory, if there are five electron domains in the valence shell of an atom, what will be the expected electron domain geometry.
A 0.2570g of pure sulfamic acid, HSO3 . NH2, is neutralized by a KOH solution. A 25.70 mL of KOH was added to the solution and 3.40 mL of HCl was used to back titrate the solution.
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