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Why do you think prokaryotic cells have cell walls and eukaryotic cells do not?
how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of oxygen are produced
The enthalpy of formation of ethanol, C2H5OH, is -277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O
Explain would the calculated molarity of NaOH be too high or too low If the KHP weighed in your experiment today was contaminated with some unknown inert substance.
Calcium nitrate will react with ammonium chloride at slightlyelevated temperatures, as represented in the equation- Ca(NO3)2(s) +2NH4Cl(s) 2N2O(g) +CaCl2(s) + 4H2O(g)
The energy levels the electron can occupy in the Be3+ ion can be calculated using the energy level equation. Calculate the energy in J of the electron when it is in the n= 4.00 level.
Draw a tetra-peptide that FPHD at pH 2.0. Clearly indicate with a circle what groups would be charged if the pH was changed to 12.0. Draw a box around the peptide bonds
Determine the pH of a solution of 10-3 M sodium formate. Formate is a byproduct of microbial metabolism, and can also serve as an energy source for anaerobic bacteria
Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4 of mass 20.0 mg.
What mass of silver is plated onto the cathode by running at 3.3A for 5.7h?Upon recharging, how long would it take to redissolve 110g of silver at a charging current of 10.0 amps
if 20 ml of .01 m hcl is required to titrate 50 ml of a saturated ba(oh)2 sol how many moles of hydroxide ion were present in the barium solution
which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 g of NaCl in enough water to produce 100.mL of solution. What is the osmotic pressure of this solution at 25 C. But NaCl dissociates into ions
the percentage of se in peroxidase anhydrous enzyme is 0.5 by weight atomic weight 78.4. then minimum molecular weight
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