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How much work does gravity do on a 0.150-kg ball falling from a height of 10.0 m? (Neglect air resistance.) A student throws the same ball straight upwards to a height of 7.50 m. How much work did the student do?
Write the ground state electron configuration , both full notation and noble gas abbreviation and indicate the number of valence electrons for Al, I, Rb, Ar, Mg
When solid iodine is introduced into an evacuated vessel at 25 degrees Celcius, some of the iodine sublimes. Predict how the enthalpy, entropy, and free energy change in the system
A certain microwave delivers 750. watts (J/s) of power to a coffee cup containing 50.0 g of H2O at 25 degrees C. if the wavelength of microwave in oven is 9,75 cm how long does it take and how many photons must be absorbed to make H2O boil
Determine the mass of CO_2 produced by burning enough carbon (in the form of charcoal) to produce 490 kJ of heat.
a 26.0-g sample of ice at -11.0degc is mixed with 123.0 g of water at 90.0degc. calculate the final temperature of the
The zinc in a 1.274g sample of foot powder was precipiated as ZnNH4PO4. Strong heating of the precipiate yielded 0.4089g Zn2P2O7. Calculate the mass percent of zinc in the sample of foot powder.
Based on the activity series provided below, which of the following reactions will occur spontaneously as written? Explain why. (The equations are not balanced) A. Sn4+(aq) + Fe3+(aq) → Sn2+(aq) + Fe2+(aq) B. Fe2+(aq) + H2(g) → Fe3+(aq) + H+(aq)
If a solution is made by mixing 20.0mL .4M NaCH3COO with 30mL .4 CH3COOH, calculate the pH for acetic acid, Ka = 1.76x10^-5.
The radius of the Earth is approximately 6370 km. if one could dig down straight towards the center of the Earth, one would find that the innermost 3480 km (the core) has an average density of about 11.g/cm^3.
what is the freezing point (in degrees celcius) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115g of water. the molar mass of Ca(NO3)2 is 164g/mol
Data for the decomposition of hydrogen peroxide at some set temperature T is provided below. The rate law depends only on the concentration of H2O2
The analysis of Ca2+and Mg2+in urine samples could be performed in a way similar to the EDTA analysis of the calcium content in water. For example, a 25.0 mL aliquot of a urine sample (buffered to pH = 10.0) required 17.2 mL of 0.0776 M EDTA to re..
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