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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.
Which sample contains more molecules? ethanol, water, or neitherwater ethanol neither Which sample has a larger mass? ethanol, water, or neitherwater ethanol neither Which sample contains more oxygen atoms? ethanol water or neitherwater ethanol neither Which sample has a larger volume? ethanol water or neither
how many moles of carbon dioxide will be formed upon the complete reaction of 0.793 moles carbon monoxide with excess water?
Zinc metal reacts with hydrochloric acid according to the following equation: Zn + 2HCl --> ZnCl2 + H2. How many grams of hydrogen gas can be obtained if 50.0 g of zinc react completely?
container and found that no change had occurred after one week. Offer possible explanations for the lack of reaction. Assume that A, B, and C are totally miscible liquids.
A 100.00 mL buffer solution is 0.175 M in HClO and 0.150 M in NaClO. What is the pH after addition of 85.0 mg go NaOH?
Please review the occurrence and cycling of calcium in nature, along with its use. Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
Which of these is a coefficient in this chemical reaction? P4s(s)+5o2(G) p4o10(S)
The heater used to heat 1400 L of air in a hot air balloon is turned off. c) A balloon filled with helium at an amusement park is left in a car on a hot day.
Calculate the [Zn2+] in a solution of ZnC2O4 held at a pH of 3.00. Remember C2O4^2- is a weak base so you must consider other equilibria. (Ksp(ZnC2O4)=7.5X10^-9, Kb1=1.8X10^-10, Kb2=1.8X10^-13).
If the mass of the metal cylinder pictured below is 18.71 g, calculate the density of the cylinder.
Investigators have reported experimental observation of the He2 ‘complex' (i.e., a very weakly bonded molecule). The fact that the observation required temperatures in the neighborhood of 1 mK is consistant with computational studies that hcDe for..
A 100.0ml sample of 0.100M methylamine(CH3NH2, kb=3.7x10-4) is titrated with 0.250M HNO3. Calculate the pH after the addition of each of the following volumes of acid. a) 0.0 ml b) 20.0 ml c) 40.0 ml d)60.0 ml
what is the global pH change incurred after injection of the HCl? What would the pH change be if this same amount of 1.000 M HCl were put into a gallon of pure water?
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