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calculate the expected yield of a reaction where 420g of magnesium reacts with 870g of bromine to produce magnesium
the weight of an object is the product of its massm and the acceleration of gravityg where g 98ms2 if an objects mass
if you wanted to combine equal numbers of na and cl atoms in a flask how much cl would you have to add if you added 23
a 59-kg woman cheats on her diet and eats a 457-calorie 457 kcal jelly doughnut for breakfast a how many joules of
a converging lens with a focal length of 175 cm and a diverging lens are placed 255 cm apart with the converging lens
calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25 degree
the density of air at ordinary atmospheric pressure and 25 degrees c is 119 gl what is the mass in kilograms of the air
imagine you are on a cart that rests on a frictionless surface you car 100 kg with 30 basketballs 1 kg each you throw
what mass of water in grams is contained in 29 l of the vapor above this solution at 55 degree c the vapor pressure of
in a certain automobile engine with an efficiency of 212 combustion of gasoline in one cylinder releases 505 j of heata
the uv spectrum of acetone c 0050 m in cyclohexane l 1cm cell shows max at 279 nm with an absorbance of 074 what is
a particular motor can provide a maximum of 1100 n bull m of torque assuming that all of this torque is used to
for uv light of wavelength 254 nm calculate the frequency and the amount of energy absorbed by a single molecule when
a simple model of the earth includes a dense spherical core of radius 4200 km and a less dense spherical shell of
how many absorptions would you expect to observe in the 13c nmr spectra of
a 400 kg mass is connected to a spring with a spring constant of 900 nm if the initial velocity is 120 cms and the
a slingshot consists of a light leather cup containing a stone the cup is pulled back against two parallel rubber bands
250-ml erlenmeyer flask contains 200 g sucrose 20 g yeast 175 ml di water and 200ml pasteurs salts the flask is fit
a two-slit interference pattern is formed using monochromatic laser light that has a wavelength of 640 nm at the first
if i0 is the intensity of the unpolarized light incident on the first polarizer and i1 and i2 denote the intensity of
in one dimension an inertial ball of mass 1 kg has a speed of 150 ms to the right and another inertial ball of mass 3
how will that change in temperature affect the rate of diffusion of molecules within the cytoplasm of the muscle cells
a pendulum is made with a 4000 kg mass suspended at the end of a thin rod the period of the small motion simple