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How many grams of sodium ion Na+ are in 2.50 g toothpaste. A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent. One tube contains 125 toothpaste..
Gas ammonia can be decomposed to give 3.00 by mass of hydrogen and 14.0 by mass of nitrogen.what mass of nitrogen is obtained.
Do all chemical compounds undergo each type of chemical reaction,i.e. synthesis, decomposition, metathesis-precipitation, metathesis-neutralization, redox-single displacement, redox-combustion and can this information be useful to a criminal inves..
How much energy would be required to melt 48 g of HCl at its melting point of -110.8C? Hfus for HCl is 14.2 cal/g and Hvap for HCl is 98.7 cal/g.
it is observed that a volume of 29.15 mL of KOH was neede to complete the process of titration. Determine what is the concentration of this unknown HCl solution?
Calcium carbide, CaC2, reacts with water to form acetylene. CaC2(s) + 2 H2O(l) C2H2(g) + Ca(OH)2(s) How many grams of water are needed to react with 473 g of calcium carbide?
Calculate the volume of a balloon at the final temperature if this balloon at temperature of 279K and an initial volume of 2.3L is warmed to 406K.
A solution is .855% HNO3 by mass. Density of the solution is 1.01 g/mL. Find [H+], [OH-], and pH.
Weight of Water Required, Calculate the weight of water required to steam distill 500mg of bromobenzene at 95 degrees Celsius.
121 cal of heat are added to 50.0 g of water initially at 15.0 (degrees celsius). What is the final temperature of the water.
Calculate the number of grams of propane (C3H8) required to heat all of the water in a 50-gallon hot-water tank from 23.4 degrees C to 65.0 degrees C
A Power plant is the main point source of SO2 emissions for a 25 km2 area. Estimate the steady-state concentration of SO2 for this area from this point source given the following temperature data. Windspeed= 5km/hr.
What mass of solid sodium formate (of MW 68.01) must be added to 140 mL of 0.3 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 3.77? Ka = 0.00018 for HCOOH.
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