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A certain radiation has a wavelength of 474 nm. What is the energy, in joules, of (a) one photon
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness is generally reported as ppm CaCO3 or mmol/L Ca2+.
What is the molecular weigh of acetic acid that will form 2 moles of CO2 assuming complete combustion.
What is the boiling point of a mixture composed of 95.0 g HOCH2CH2OH (ethylene glycol) and 205 g H2O? The boiling point elevation constant for H2O is 0.512 °C/m.
How many grams of Mg(NO3)2 (Mm=147 g/mol) must be added to 405 g of water to make a solution with a colligative molality of 0.125 m?
if a sample of 0.29 moles of Ar occupies 3.8L under certain conditions, what volume will 0.66 moles of Ar occupy under the same conditions.
A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1).
Determine the mass of lithium hydroxide produced when 0.38 g of lithium nitride reacts with water to make Ammonia (NH3) and Lithium hydroxide.
What is the concentration of hydrogen ions in a solution containing 0.39 M HOCN(cyanic acid) and 0.726 M (NaOCN) (sodium shiu (ys6479) - Acid Base Buffers - dungan - (00533434) 3 cyanate).
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
Calculate empirical formula of this compound & molecular formula and calculate the molality of solution of sulfuric acid?
Meaning, use and calculation of empirical formulas, In this introduction are given the explanation of how to find out an empirical formula if one has found out the chemical elements of an unknown substance and measured their ratio of masses
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