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Question- If an electron in a hydrogen atom starts in the fifth energy level then emits a photon of 433 nm light, to which energy level did it fall?
Rewrite your answer from the stating and prove each step carefully.
a compound contains 87.7% carbon and 14.3% hydrogen.its relative molecular mass is 70.what is the empirical formula and the molecular formula.and is it an alkane or alkene
In a preparation of 2-butanone 2,4-dinitrophenylhydrazone, calculate the amount of reagent to be weighed out from a bottle of (70% 2,4-DNP/30% H2O) if it is reacted with 4.14g of 2-butanone and a 1.4 molar excess of the 2,4-DNP is required.
methanol is burned as fuel this makes it clear that the reaction is spontaneous once methanol is ignited. yet the
How many grams of TiCl4 are needed to react completely with 155 L of H2 at 435 oC and 795 mm Hg pressure?
Draw electron-dot structures for the following molecules, which contain atoms from the third row or lower.
How many grams of Na3PO4 will be needed to produce 425 mL of a solution that has a concentration of Na+ ions of 0.900 M ?.
What two properties of ATP make it ideally useful for a form of energy storage in cells? Describe why the hydrolysis of ATP is highly exergonic (give at least two reasons).
the air temperature is 38C in which speed of sound is 336m/s. The zero of the meter scale coincides with the top end of resonance column tube.when the first resonance occurs,reading of water level is?
Could someone explain this competition and interaction? I know that chromatography is based on the attraction with the stationary phase or mobile phase
What is the heat kcal released when 50.0 g of water at 100 degrees C hits the skin and cools to a body temperature of 37 degrees C
What is the intact compound equation and the net ionic equation for the neutralization of aqueous hydrofluoric acid by aqueous calcium hudroxide?
Predict the sign of Delta Ssys for EACH of the following processes. -Gaseous Cl2 in the stratosphere to form gaseous Cl atoms. -Gaseous CO reacts with gaseous H2 to form liquid methanol, CH3OH. -Calcium phosphate precipitates upon mixing Ca(NO3)2(..
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