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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
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
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
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
for uv light of wavelength 254 nm calculate the frequency and the amount of energy absorbed by a single molecule when
how many absorptions would you expect to observe in the 13c nmr spectra of
250-ml erlenmeyer flask contains 200 g sucrose 20 g yeast 175 ml di water and 200ml pasteurs salts the flask is fit
how will that change in temperature affect the rate of diffusion of molecules within the cytoplasm of the muscle cells
what is the ph of a solution containing 010 l of 010 m acetic acid to which 0010 moles of acetate are added volume does
some people have argued that rocket engines will not work because the gaseous products of said engine pushing against a
a 750 piece of iron at 100c is dropped into 250g of water at 220c assuming that the heat lost equals heat gained
calculate the work in joules needed to expand a balloon from 5ml to 3350l against standard atmospheric pressure your
calculate the boyle temperatures for carbon dioxide oxygen and nitrogen using the van der waals constants how close do
you analyze 100 kg of a gas in a tank at atmospheric pressure and find the following co2 193 n2721 o265 h2o 21 what is
consider the ground state electron configuration of the atoms with the following atomic numbers 720263237418596
the amino acid sequence shown below represents a portion of a peptide obtained from a large protein1 2 3 4 5 6 7 8 9 10
car batteries are filled with sulfuric acid what is the mass of the acid in grams in 5000 ml of the battery acid
sulfur dioxide is produced in enormous amounts for sulfuric acid production it melts at -73 deg celsius and boils at
fish produce glycerol to survive the freezing waters of the arctic determine the degree to which the freezing point of
a flask contains 300ml of 012m phosphate buffer that has a ph of 72 what volume of 02m hcl should be added to drop the
what is the ph of a solution made by adding 20g of potassium acetate to 100 ml of distilled
a cylindrical tube 155 cm high and 35 cm in diameter is used to collect blood samples how many cubic decimeters dm3 of