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How do you solve this? what formulas do you need? how do you go from n=3 to n=5? Please help! what frequency of light is required to cause an electron in the helium ion (He+) to undergo a transition from level n=3 to level n=5? a) 2.34x10^14 Hz b)9.36x10^14Hz c)6.20x10^-19 Hz d)1.55x10^-19 Hz e)1.10x10^-6 Hz
Write a balanced equation for the neutralization of each of the following: a)H3PO4(aq) and NaOH(aq) b)HI(aq) and LiOH(aq) c)HNO3(aq) and Ca(OH)2(s)
The final volume of the balloon is 1500 mL. The atmospheric pressure is 1.00 atm. What was the original pressure of HI in the cylinder before the release of HI
What is the resultant pressure if 3.7 mol of ideal gas at 273 K and 1.97atm in a closed container of constant volume is heated to 446 K.
Determine the energy change associated with these changes in state: a. 138g of steam condenses,b. 261mg of solid mercury melts,c. 8.36g of rubbing alcohol freezes d. 52g of liquid methane boils
Separation scheme for isolating benzoic acid, Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard
A 2.5-L sample of a 6.3M NACl solution is diluted to 75L.What is the molarity of the diluted solution?
How many mL of 0.380 M solution can be prepared by dissolving 4.00g of Ca(OH)2 in water?
A light green liquid, and informed that someone accidentally spilled a few small flecks of an intensely green-colored crystalline dye in a rather expensive solvent, so it doesn't make sense to throw away the very slightly contaminated solvent.
Osmium has a density of 22.6 g/cm3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium?
A large balloon is initially filled to a volume of 25.0L at 353 K and a pressure of 2575 mm Hg. What volume of gas will the balloon contain at 1.35 atm and 253 K?
NH3(Ammonia ) is widely used in many household cleaners and as a fertilizer. Calculate How much ammonia (in units of mol) is produced when 7.8 mol of H gas react with an excess of N gas.
If 36 L of Hydrogen at 44 C and 94 kPa react with sufficient oxygen to produce water, what mass of water can be produced?
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