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Calculate the mass (g) of NiS that will dissolve in 1100 mL of 0.169 M NiCl2 solution. The equation represents the solubility process.
NiS (s) <---> Ni2+ (aq) + S2- (aq)
Hydrogen gas was collected by downward displacement of water. A volume of 0.600 L of gas was collected at 25.0 °C and 740.0 torr. What volume will the dry hydrogen occupy at STP? The vapor pressure of water is 21.2 torr at 25.0 °C.
State what substances (if compounds, give their formulas) exist in each region. Label each substance in each region as solid, liquid, or gas.
which observed color band corresponds to the largest energy difference between levels and which is the smallest?
Determine whether each of the following causes an increase or decrease in the activity of the electron transport chain. 1. High NADH concentration
A compound is composed of elements C, H, and N. A 7.875-mg sample of the unknown compound was combusted, producing 21.363 mg of CO2 and 6.125 mg of H2O. What is the empirical formula for this compound? (Type your answer using the format CxHyNz for..
NH3 is a weak base (Kb=1.8 x 10^-5) and so the salt NH4Cl acts as a weak acid. What is the PH of a solution that is 0.039 M in NH4Cl?
A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 millicuries/mL. If the patient undergoing the test needs a dose of 10 millicuries
Considering given equation as P4(s) + 5 O2(g) P4O10(s) where ΔH = -3013 kJ/mol you just need to compute the heat evolved when 436 grams of white Phosphorous (P4)burns in air according to the given equation as above.
Produce a buffer solution that has a pH of 5.32. You already have a solution that contains 10 \rm mmol (millimoles) of acetic acid. How many millimoles of acetate
Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. (a) 100.0 mL of 0.42 M HC7H5O2 (Ka= 6.4 multiplied by 10-5) titrated by 0.42 M NaOH halfway point equivalence point
What is the rate of reaction of O2? What is the rate of formation of N2O5?
Chlorine consists of two major isotopes with the following atomic masses: 35Cl (34.9689 amu) and 37Cl (36.9659 amu). The average atomic mass of chlorine is 35.4527 amu.
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