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An aqueous solution contains 4.20% NH3 (ammonia) by mass. The density of the aqueous ammonia is 0.979 g/mL. What is the molarity of NH3 in the solution?
A solution is 0.40 mol % (C6H6) in carbon tetrachloride (CCl4) at 20 degree celcius. the vapor pressure of pure benzene at this temperature is 74.61 mmHg and the vapor pressure of pure carbon tetrachloride is 91.32 mmHg
Given that the specific heat capacities of ice and steam are 2.06 j/g degrees C and 2.03J/g degrees C, respectively, calculate the total quantity of heat evolved when 10.0 g of steam at 200 degrees C is condensed, cooled, ad frozen to ice at -50 d..
the value of electronegativity for magnesium 1.2 and the value for oxygen is 3.5. determine what type of bond is
A reaction vessel contains 13.9g of CO and 13.9g of O2. How many grams of CO2 could be produced according to the following reaction? 2CO + O2 ---> 2CO2
What are your actual experimental ratios? Give possible reasons for any observed variations from these ratios.
the air temperature is 38C in which speed of sound is 336m/s. The zero of the meter scale coincides with the top end of resonance column tube.when the first resonance occurs,reading of water level is?
calculate the equilibrium constant for the neutralization reaction. To calculate the equilibrium constant, you may find it helpful to represent the neutralization reaction as the sum of two separate reactions. (b) Calculate the pH, [CH3CH2NH2], and..
How do you determine the number of protons and neutrons in an atoms' nucleus and the number of electrons in its first and second shells?
Penicillase is an enzyme secreted by bacteria to inactivate the antibiotic penicillin. The enzyme has a molar mass of 30,000 and a single active site. The catalytic rate constant is 2000 s-1 and the Michaelis constant is KM = 5 x 10-5 M.
A piece of gold has the shape of a cube- each of its sides measures 5.00 cm. the volume of a cube is length x width x height. if the density of gold is 10.5 g/cm^3, what is the mass in grams of the piece of gold?
The accepted toxic dose of mercury is 300ug/day there is 180ug of mercury per cubic meter of air. ingestion of 20,000L air per day is she at risk for mercury poisoning?
calculate the composition of the vapor phase at 25 °C if the vapor above the liquid phase is composed only of 1-propanol and 2-propanol
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