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Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00 g of 32P, how many grams will remain after 98.0 days ?Express your answer numerically in grams.
provide the chemical reaction of an oxidation-reduction reaction that was observed to be spontaneous. provide a value
Balance the following equation in standard form and determine the SUM of the coefficients. FeO(s) + O2(g) --> Fe 203(s)
A 9.4-g sample of powdered titanium was added to a graduated cylinder originally containing 6.8 mL of water. After addition of the titanium, the water level in the graduated cylinder was 8.9 mL. What is the density of titanium
Why is it extremely dangerous to attempt to carry out a distillation in a completely closed apparatus
Calculate the molar heat of neutralization. Assume the specific heat of the solution is 4.184 J/g*degrees C. The heat capacity of the calorimeter is 32.5 J/degrees C.
Evaluate the height of the waterfall if the water temperature is 0.213 C warmer at the bottom than the top. Gravitational potential energy is given by mgh where m is the mass of a given amount of water and h is the height of the water. Explain the..
When aqueous solutions of potassium acetate and hydrochloric acid are mixed, an aqueous solution of potassium chloride and acetic acid results. Write the net ionic equation for the reaction.
Find out the kinetic energy of a photoemitted electron from the surface of Cs if the wavelength of the incident light is 525 nm. The work function for Cs is 2.14eV. Explain what is the velocity of the electron
what is the pH of a Tris buffer (pka 8.1) prepared by adding 20 mL of 1M HCl to 100mL of a solution of 0.3M Tris
A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg
An application calls for N2(g) with a density of 1.80g/L at 32 degrees. What must be the pressure (atm) of the N2(g)?
Sn2 reactions occur at different rates depending on the structure of the substrate in the reaction . Would an Sn2 reaction occur at a faster rate on a primary or a tertiary substrate ? Briefly. Explain your answer
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