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The pH of a household cleaning solution is 11.64. This cleanser is an aqueous solution of ammonia with a density of 1.00 g/mL. What is the mass percentage of ammonia in the solution?
Draw formulas that illustrate the hydrogen bonding that may exist between two polyamide molecules after fibers have been cold drawn. In this lab,
The constant pressure molar heat capacities of ice and water are 37.7 J/ mol K and 75.3 J/ mol K respectively. The molar enthalpy of fusion of ice is 6.01 kJ/ mol at 0.00° C. The system consists of a 105 gram sample of H2O, initially in the form o..
The water level in a graduated cylinder initially at 223 mL rises to 282 mL after a piece of lead is submerged. What is the mass in grams of the lead?
A mixture of gases conssists of CH4 at a partial pressure of 143 mm Hg, N2 at a partial pressure of 469 mm Hg, and O2 at a partial pressure of 563 mm Hg
Mild acid treatment of this compound produces a solution which reduces periodic acid. What is the structure of Michelleose? Explain your reasoning
Consider a piece of gold jewelry that weighs 9.95 and has a volume of 0.695 . The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 , respectively. If the total volume of the jewelry is the sum of the volumes of the gold
Calculate the number of grams of NO2( molar mass=46.01 g/mol) gas inside a .500 L container at STP.
Consider two samples of liquid: one mole of water H2O and one mole of ethanol C2H5OH. The density of water is 1.0 g/mL, and the density of ethanol is 0.785 g/mL. Answer each of the following questions by selecting the correct choice.
For which of the following species is resonance an important property: HONO, HONO2, N3-, NO2-, NO2
The reactant concentration in a second-order reaction was 0.410 M after 190s and 1.60×10^?2 M after 820s . What is the rate constant for this reaction
A single pulse of a laser yields an average of 5.00 × 1018 photons with λ = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0g of ice?
A 75.0 mL volume of 0.200 M NH3(Kb=1.8e-5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 21.0 mL of HNO3
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