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A sample of helium gas occupies 120 mL at 71 mmHg. For a gas sample at constant temperature, determine the volume of helium at 45 mmHg. Show your work
1. if the paradichlorobenzene sublimes how will this affectthe calculation of the molar mass of your unknown?2. explain
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 5 state to the n = 3 state
question how to draw a diagram of sodium metal starting with one sodium atom then two atoms then four atoms then eight
The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6 J/(K*mol)for the vapor.
Use values of Ksp for Zn(OH)2 and Kf for Zn(OH)4-2 (page 330) to predict if a precipitate will form when you prepare a solution which contains 0.010 M Zn2+ and 1.0 M NaOH.
when 1 mole of h2 gas reacts with 1 mole of f2 gas 2 moles of hf gas are produced and 536 kj of energy is released. is
Question- Iodine 131 is a radioactive isotope. After 2.00 days, 84.2% of a sample of 131-I remains. What is the half-life of 131-I
A voltaic cell employs the following redox reaction: Sn^2+(aq)+ Mn(s)--> Sn(s) + Mn^2+(aq) Calculate the cell potential at 25 under each of the following conditions.
An athlete wants to acquire red blood cells from a donor with the same blood type. Taking into consideration that blood is composed of three components, plama, red blood cells, and leukocytes. what instrument have used in our lab experiments that ..
Explain Zinc sulfide reacts with nitric acid to give zinc sulfate and nitric oxide. Compute the mass of zinc required to react with 110mL of 0.15 M nitric acid
An element X reacts with oxygen to form XO2 and with chlorine to form XCl4. XO2 is a white solid that melts at high temperatures (above 1000 ? ). Under usual conditions, XCl4 is a colorless liquid with a boiling point of 58.?. XCl4 reacts with wat..
when ethane (C2H6) is burned, how many grams of oxygen are needed to react with 477 grams of ethane?
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