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Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies 104.9 MHz 1090. kHz 838.7 MHz express answer in joules using four significant figures
Write the full symbol for each isotope (give both A and Z for each isotope). How many protons, and how many neutrons are present in the nucleus of each isotope?
A 43.0 g sample of ethylene glycol, HOCH2CH2OH, is dissolved in 540.0 g of water. The vapor pressure of water at 32°C is 35.7 mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32°C ?
An oil bath maintained at 50.5 oC loses heat to its surroundings at the rate of 4.68 kJ/min. Its temperature is maintained by an electrically heated coil with a resistance of 60 operated from a 110 V line.
Question- A solution is made up by dissolving 15.0 g Na2CO3*10 H2O in 100.0 g of water. What is the molality of Na2CO3 in this solution
Choose the INCORRECT statement. a) When a half reaction is reversed, the sign of the potential is changed. b) reversing a half reaction makes it a reduction potential. c) each cell has a reduction half cell and an oxidation half cell.
Draw the structural formulas for any three compunds with the molecular formula C4H10O. If its an alcohol, classify each alcohol as primary, secondary, or tertiary?
A typical hot pack is designed to reach a temperature of approximately 50 degrees Celsius starting from room temperature at about 20 degrees Celsius. Assume that the hot pack will contain 100.0 mL of water.
Write chemical equations for the reaction of fluorine with the following substances, making sure that the numbers and kinds of atoms are the same on both sides of the equations. If no reaction occurs, write noreaction
What is the value of Delta S when 2.7g of CH4 is compressed from 29.0 L to 18.0 L at a constant temperature of 100 C?
Question- Part 1) For each of the following complexes, give the electronic configuration of the d - orbitals (e.g. t 2 g^ 3 eg ^1 ), indicate whether the complex is high - spin or low - spin, and give the number of unpaired electrons:
how much diesel fuel does it take to charge a mobile phone? one gallon of diesel fuel contains about 1.44e8 j of
a 5.75 sample of s02cl2 was placed in a 2.00-l flask initial concentration of 0.0213m. at 648k the equilibrium of so2
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