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A 6.26 g sample of a solid containing Ni is dissolved in 20.0mL water. A 5.00mL aliquot of this solution is diluted to 100.0mL as well as analyzed in the lab. The solution was determined to contain 5.16ppm Ni.
Find out the molarity of Ni in the 20.0mL solution.
Find out the mass in grams of Ni in the original sample.
Find out the weight percent of Ni in the sample.
If 125 calories of heat is applied to a 60.0 grams piece of copper at 21.0 degrees Celsius, what will the final temperature be? The specific heat of copper is 0.0920 calories per grams times Celsius.
Draw the base pairing between 8-oxoguanine and cytosine and 8-oxoguanine and adenine. Use single bonds to represent hydrogen bonds.
How many moles of hydrogen are consumed when 40.0 L of hydrogen chloride gas are produced in the following equation? H2 + Cl2 ---> 2HCl
160 mL that contains 400 mg of NH3 and 980 mg of NH4NO3. (Given: Kb (NH3) = 1.8 x 10-5
The specific gravity of iron is 7.87, and the density of water at 4.00 degree celcisus is 1.00 g/cm3 . You can use this information to find the density of iron. Find the volume occupied by 5.50 g of iron.
Calculate the pH or the hydrogen ion concentration as required for each of the following substances: 0.075M acetic acid
A 30.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 150.0 mL. The concentration of the final solution is 0.00307 M. Calculate the concentration of the original solution.
how do you calculate the number of equivalents of NaOH required to reach the equivalence point?
he reduction table in your notes, calculate the standard cell potential for the following reactions. 2 Al3+(aq) + 3 Pb(s) 2 Al(s) + 3 Pb2+(aq)
A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2 HgO(s) 2 Hg(l) + O2(g) Hrxn = 181.6 kJ (a) How much heat is needed to decompose 504 g of the oxide? kJ
for a parallel reaction a giving b and c the reaction rate constant k1 4.8 times10-7 s-1 the selectivity between c and
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
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