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calculate the amount of cobalt(II) nitrate hexahydrate [Co(NO3)2 * 6H2O] needed to prepare 50 mL of a 0.15 M cobat(II) nitrate stock solution.
Ammonium hydrogen sulfide decomposes on heating NH4HS(s) NH3(g) + H2S(g) If Kp for this reaction is 0.11 at 298 kelvins (with pressures in atmospheres)
Calculate the number of grams of sulfuric acid present in the mixture after the reaction is complete.
0.90 of hydrogen chloride () is dissolved in water to make 5.5 of solution. What is the of the resulting hydrochloric acid solution?
What is the molarity of ZnCl2 that forms when 30.0 grams of zinc completely reacts with CuCl according to the following reaction? Assume a final volume of 275.
A student is required to generate 90.0 mL of carbon dioxide at 750 mm Hg and 21C using potassium hydrogen carbonate and HCl. What is the mass of the potassium hydrogen carbonate needed?
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon
how many moles of copper nitrate are present in 5 ml of 1.20 M copper nitrate? how do you arrive at that answer?
How many grams of ethylene glycol would be needed to prevent 4kg of water from freezing above -5.0 degress C
A beaker with 120 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.50 mL of a 0.250 M HCl solution to the beaker. How much will the pH..
The Al2O3 does not react. If the sample residue weighs 2.456 g, what is the mass fraction of Fe2O3 in the original sample?
During photosynthesis chlorophyll a absorbs light of 440 nm and emits light of 670 nm.
Nitrogen and hydrogen gases react to form ammonia gas as follows: N2(g)+3H2(g)-->2NH3(g) At a certain temperature and pressure, 1.7 L of N2 reacts with 5.1 L of H2. If all of the N2 and H2 are consumed, what volume of NH3(g) is produced at the sam..
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