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Explain how many grams of C2H2 must burn according to the equation below in order to heat 2.34x104 grams of H2O from 25*C to 50*C?
C2H2(g) + 5/2 O2(g) > H2O(l) + 2CO2(g) (Delta H = -1212kJ)
Explain what additional piece of information must you look up?
Correct the refractive index and boiling point to 20 degrees Celsius and 1 atmosphere and calculate the density of the unknown?
Calculate the pH of 1.00 L of a buffer that is 0.200 M in HC2H3O2 and 0.100 M in NaC2H3O2. The Ka of HC2H3O2 = 1.8E-5
The sodium isotope,^21,11 Na,with a half-life of 23s, undergoes decay by emitting a positron. write the complete nuclear reaction.
How do scientists know what is the composition of something. i.e. when they mention that "oxygen was obtained" how can they identify the element or compound without a doubt
When a neutralization reaction was carried out using 100 ml of .7890 NH3 water and 100 ml of .7940M acetic acid change in temperature was found to be 4.76 degress C. Specific heat of reaction mixture was 4.104 J g-1 K-1 and density was 1.03 g mL-1..
A chemist must prepare 0.9 L of sodium hydroxide solution with a pH of 13.40 at 25 C. He will do this in three steps: Fill a 0.9 L volumetric flask about halfway with distilled water
there is a no change in VMAX and an increase in KM,app. E. As [I] increases, there is a decrease in VMAX and no change in KM,app.
When you allow a can of carbonated beverage to sit open so that the carbon dioxide is released to the atmosphere ,does the pH of beverage remain the same,increase or decrease. Explain
The melting point of tropylium bromide is above 200 degree C, quite high for an organic compound. How can you account for these experimental observations?
Explain the prostaglandin precursor arachidonic acid has the molecular formula C20H32O2. Specified that arachidonic acid is an acyclic carboxylic acid that contains no carbon-carbon triple bonds explains how many carbon-carbon double bonds are pre..
What mass of helium gas is needed to pressurize a 120.0 L tank to 264 atm at 25°C?
Calculate the percent (by volume) of air that would be displaced when all of theN2 (l) get evaporated. it is given that Liquid nitrogen has a density of 0.807 g/mL
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