masre man

Two planes leave an airport flying at the same rate.If the first plane flies 1.5 hours longer than the second plane and travels 2700 miles while the second plane travels only 2025 miles, for how long was each plane flying?

calculate the energies of the states of the hydrogen atom with n=2 and n=3, and calculate the wavelength of the photon emitted by the atom when an electron makes a transition between these two states.

what is the wavelength of a photon emitted during a transition from the initial state(ni)=5 state to the final state(nf)=2 state in the hydrogen atom?

If A and B are vectors such that A+3B=-3+j & A-B=i-2j then find A&B?

How much energy, in kilojoules per mole, is released when an electron makes a transition from n=5 to n=2 in an hydrogen atom? Is this energy sufficient to break the H-H bond (436 kj/mol is needed to break this bond)

Although my ring is of little______,it is precious to me as it was my mother's.

rate=distance/time 2700/*=2025/y 2700/*=2025/*-1.5, *diferent from 0,1.5 *=6hrs & y=4.5hrs

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excuse me * this symbols star

h devided by 3 & 34 divided by 1.7 h/3=34/1.7 3x34/1.7 h=60 feet

h devided by 3 & 34 divided by 1.7 h/3 = 34/1.7 next cross 3x34/1.7 h=60 feet

are you sure

Hexane is an extraction solvent. formula C6H14 and Benzene is used as an industrial solvent. formula C6H6