Gaseous butane
CH3CH22CH3
reacts with gaseous oxygen gas
O2
to produce gaseous carbon dioxide
CO2
and gaseous water
H2O
. If
36.4g
of water is produced from the reaction of
49.99g
of butane and
339.9g
of oxygen gas, calculate the percent yield of water.
Round your answer to
3
significant figures.
In: Chemistry
Consider the combustion of butane:
C4H10(g) +O2(g)->CO2(g)+H2O(l) (unbalanced)
Let 2.00 g of butane gas and 3.05 atm of oxygen gas completely react (limiting) in a 2.00-L container at 125C.
2.1 Will there be a net increase or decrease in total pressure after the reaction is complete?
2.2 After complete reaction, what will be the mole fraction of H2O gas in the system?
In: Chemistry
In: Chemistry
Based on their names alone, which of these enzymes requires a nucleoside triphosphate as a substrate, or produces it as a product?
Palmatoyl Synthase
Rubicate Synthase
Succinyl CoA Synthetase
Citrate Synthase
In: Chemistry
1).If the pH of 1.000 L of HCL is 2.3377, what is the H+? What would the final pH be if 0.17644 g of NaOH were added? Show the reaction between these 2 compounds
2) The pH of solution .1000 M 2,6-Dinitrophenol (acid form, like [HA] is 1.293. If you determine that the phenolate (anion from the weak acid, like [A-]) is 2.41 x 10^-4 M what is the pKa of 2,6-DNP?
In: Chemistry
Comment on the problems of using chromium-based oxidizing agents in practical organic chemistry.
In: Chemistry
The equilibrium constant for the reaction
2 C3H6(g) ↔ C2H4(g) + C4H8(g)
Is found to fit the expression: lnK = A + B/T + C/T2, between 300 and 600 K, where A = -1.04, B = -1088 K, C = 1.51x105 K2. Calculate the standard reaction enthalpy and standard reaction entropy at 400 K.
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A compound has a molar mass of 100 g/mol and the percent composition (by mass) of 65.45% C, 5.45% H, and 29.09% O. Determine the empirical formula and the molecular formula.
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Assuming that you work in a confectionery industry which include gum, sugars, and chocolates which are polysaccharides, describe a hypothetical method of developing a confectionery that will have a jelly-like consistency inner layer enclosed in a brittle outer layer. (Clue: You may prepare each layer and alter their properties separately prior to mixing. Provide biochemical explanation.)
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For the reaction; write the conventional equation, ionic equation, and net ionic equation, when solid copper (II) hydroxide is "dissolved" by hydrochloric acid.
In: Chemistry
1. Write the isotope needed, by identifying A, Z, and X, to balance the following nuclear fission reaction: 23592U+10n→14054Xe+AZX+4 10
|
2. Complete each of the following nuclear equations: |
Part A 10n+?→13253I+0−1e Express your answer as an isotope. Part B 42He+12250Sn→?+11H Express your answer as an isotope. Part C ?→3517Cl+0−1e Express your answer as an isotope.
3.
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In: Chemistry
How many grams of water at 25°C must be added to a Dewar flask (isolated system) containing 20 g of ice at -5°C to satisfy the conditions in (a) through (d)? Compute the entropy change in each case.
Predict the sign of ΔS in each case before doing the calculation.
a) The final temperature is -2°C; all the water freezes.
b) The final temperature is 0°C; half the water freezes
c) The final temperature is 0°C; half the ice melts
d) The final temperature is 10°C; all the ice melts
In: Chemistry
In: Chemistry
Describe the pathway your body uses to produce energy during a period of starvation?
In: Chemistry
A 21.8 g sample of ethanol (C2H5OH, 46.07 g/mol) is burned in a bomb calorimeter, according to the following reaction equation. If the temperature of the rises from 13.0 °C to 79.3 °C, what is the heat capacity of the calorimeter?
C2H5OH(l) + 3 O2(g) →2 CO2(g) + 3 H2O(g) ΔH°rxn = –1235 kJ
In: Chemistry