Indoor air. a convective kerosene heater is tested in a well-mixed 35 m3 atm, having an air exchange rate of 0.42 ach. the room is free of no before 9. (15 points 25 °c the and 1 atm, having an air e ng heater. after one hour of operation, the no concentration reached 5.2 ppmv a conservative pollutant, calculate the emission rat assuming that no no is e (mg/hr) of no from the heater.

Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene