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An element crystallizes in a body centered cubic lattice. The edge of the unit cell is 3.47 Å, also the density of the crystal is 7.98 g/cm3. Compute the atomic weight of the element.
A volume of 75mL of H2O is initially at room temperature (22C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.0 Celsius, what is the mass of the steel bar?
avogadros number is big. if you had 6.02 x 1023 dollars and could spend it at 1 billion 109 per second for your entire
Yeast and other organisms can convert glucose (c6h12o6) to ethanol (ch3ch2oh) by a process called alchoholic fermentation. The net reaction is
The disappearance of X is monitored at timed intervals. Assume that temperature and volume are kept constant. The data obtained are shown in the table below.
The vibrational parameters for H35Cl are frequency = 2990.95 cm-1 and vxe = 52.819 cm- 1. Calculate the 35Cl to 37Cl isotope shift for the v=1-0 vibrational interval for both HCl and DCl. Can you explain why one is larger than the other
A 50.0 ml sample of 0.100 M HNO3 is titrated with 15.0 ml of 0.200 M NaOH. What is the pH of the resulting solution, a) 1.00
Find the activity(not the activity coefficient) of the (C3H7)4N+ (tetrapropylammonium) ion in a solution containing 0.005 M (C3H7)4N+Br- plus 0.005 M (CH3)4N+Cl-. The ionic strength will be affected by mixing
Which of the following are typically TRUE of an oxidizing agent? 1. It causes oxidation. 2. It gains electron(s). 3. It is the reduced substance. 4. all 5. none
Why are polychlorinated biphenyls (PCB's) importance to an EH&S or FS professional who encounters them when come to an incident where they are present?
Phenolphthalein is one of the most common indicators. What are its colors in acidic and in basic solutions?
Determine the pressure (in atm) inside the can if a metal can of 1.00 qt contains 0.150 grams of Helium at a temperature of 20 degrees Celsius also explain Is this pressure greater or less than standard atmospheric pressure?
The Chemistry of Nicotine, Nicotine, a component of tobacco, is composed of C, H, and N. A 5.250-mg sample of nicotine was combusted producing 14.242 mg of CO2 and 4.083 mg of H2O
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