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Problem- The distance across a water molecule is approximately 257 x 10^-11 meters (note this number is intentionally not in proper scientific notation). What is this measurement in nanometers? Express your answer in proper scientific notation, and be sure to state the units.
Please illustrate work if possible thanks
The Keq for the equilibrium below is 5.4 × 1013 at 480.0 °C. 2NO (g) + O2 (g) ? 2NO2 (g) What is the value of Keq at this temperature for the following reaction? 4NO (g) + 2O2 (g) ? 4NO2 (g)
When 1.926 g of succinic acid was dissolved in water and titrated, 65.20 mL of 0.5000M NaOH solution was required to neutralize the acid. How many acidic hydrogens are there in a molecule of succinic acd
Explain how many grams of benzene, C6H6, can be melted with 16.2 kJ of heat energy. The molar heat of fusion of benzene is 9.95 kJ/mol.
Acetic acid, CH3COOH, is a weak monoprotic acid (pKa=4.74 at 25oC). What is the pH of 0.191 mol/L CH3COOH(aq) at 25oC
What mass of methane, CH4, is contained in a 500.-mL sample of CH4 at STP?
When measuring the specific heat of a metal, why is it best to use the minimum amount of water needed to cove the metal. (hint: consider the size of the temperature change)
Problem- Find the pH of the equivalence point and volume (mL) of 0.200 M HCL needed to reach the equivalence point in the titration of 65.5 mL of 0.234 M NH3.
A gas containing only CH4 and N2 is burned with air yielding a flue gas that has an Orsat analysis of CO2:8.7%, CO: 1.0%, O2:3.8%, and N2:86.5%. Calculate the percent excess air used in combustion and the composition of the CH4-N2 mixture.
If 10g of na2s2o3 are reacted with 10g of agbr, what would be the maximum yield of nabr and which is the limiting reagent, if any?
Compare the properties of elements and compounds. Give two examples of each, including one example that exists in the human body. Explain the atomic nature of one element and one compound found in human body.
When SiO2 is heated to melting, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. in an industrial preparation of silicon, 155.8 Kg of SiO2 reacts with 78.3 Kg of carbon to produce 66.1 Kg of silicon.
What are the coefficients of the six species in the balanced equation above. Remember to include H2O(l) and H+(aq) in the appropriate blanks.
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