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calculate the heat of formation of magnesium oxide mgo data given are mgs 2hcl aq gt mgcl2 aq h2 g h 462 kjmol mgos
a lamp r 146 an electric heater r 24 and a fan r 49 are connected in parallel across a 122 v linea what total
a sample of ideal gas at room temperature occupies a volume of 340 l at a pressure of 722 torr if the pressure changes
recent studies seem to indicate that using a mobile phone while driving is dangerous one reason for this is that a
vertically polarized light with an intensity of 040 wm2 passes through a polarizer whose transmission axis is at an
in 02s a coil of die with 50 loops experiences an average induced emf of 9v due to a changing magnetic field
a wooden block with mass of 55 grams is floating in a pool ranging up and down in simple harmonic motion of frequency
a stone is dropped at t 0 a second stone with 6 times the mass of the first is dropped from the same point at t 100
copper crystallizes in a face centered cubis lattice if the edge of the unit cell is 351pm what is the radius of the
high-pressure liquid chromatography hplc is a method used in chemistry and biochemistry to purify chemical substances
a hollow sphere of radius 030 m with rotational inertia i 0098 kg m2 about a line through its center of mass rolls
select one of the following regions of the electromagnetic spectrum radio wave infrared ultraviolet x-ray gamma rays
calculat the freezing point of a solution containing 500 grams of kcl and 55000 grams of water the molal freezing point
ethane c2h6 undergoes combustion according the following chemical equation c2h6l 72o2g ---gt 2co2g 3h2ol calculate
write the balanced equation for the hydration of cuso4 indicate the physical states using the abbreviations s l or g
at a construction site a 620 kg bucket of concrete hangs from a light but strong cable that passes over a light
an 900 kg purple pickup truck tows a small 200 kg trailer using a relatively lightweight tow rope as shown in the
oxygen gas generated by the reaction 2kclo3s 2kcls 3o2g is collected over water at 27degc in a 378-l vessel at a
a uniform magnetic field is at right angles to the plane of a wire loop if the field decreases by 02t in 10x10-3s and
a satellite 83x107 km above the surface of a celestial body whose radius is 39000 km and whose mass is 60x1027 kg
light of intensity 05 wm2 passes through the pupil of one of your eyes and eventually falls on your retina the radius
a rubber ball is shot straight up from the ground with speed v0 simultaneously a second rubber ball at height h
nitrogen gas n2 reacts with hydrogen gas h2 to form ammonia nh3 at 200degc in a closed container 13 atm of nitrogen gas
the vapor pressure of liquid mercury is 02729 torr at 1000 oc and 24680 torr at 3000 oc a calculate delta h of
a baseball is confined between two thick walls a distance 05m apart calculate the zero point energy of the baseballmass