Get college assignment help at uniessay writers A gas expands and does P-V work on the surroundings equal to 328 J. At the same time, it absorbs 108 J of heat from the surroundings. Calculate the change in energy of the gas.
A 75.0-L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank?
for a solution that is 0.270M CH3H5O2(Ka=1.3*10^-5)and 0.089M HI, calculate[H3O ] [OH-] [C3H5OO-] [I-]
Liquid ammonia (boiling point = -33.4°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from -65.0°C to -12.0°C?
How to balance C4H10S(l) O2(g)?
Explain why the following nucleophilic substitution reaction will not take place: CH3OH :Br ->:OH CH3Br
The heat of solution of NH4NO3 is 26.2 kJ/mol. Is heat evolved or absorbed when a solution of NH4NO3 is diluted by addition of more water?
can you please help me with 6 and 7?
How many grams of N2 can be produced when 6.90g O2 reacts?
What will be the final temperature of a mixture made from equal masses of water at 24.1 C, ethanol at 37.3 C, and iron at 93.3 C? The specific heat capacities of each are: 0.449J/g C (Fe), 4.18J/g C(Water), and 2.42 J/g C (ethanol).
Get college assignment help at uniessay writers A calorimeter contains 29.0 of water at 15.0. When 1.40 of (a substance with a molar mass of 48.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.0. Calculate the enthalpy change, , for this reaction per mole of . Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings
LEWIS DOT STRUCTURE OF IF4
“1)The nucleotides in the backbone of DNA are held together by…… bond. A)Phosphodiester B)Peptide C)Hydrogen D)glycosidic 2)why do carboxylic acids have higher boiling points than similar alcohols or aldehydes? A) They have an additional oxygen atom. B)The carboxylic acid chain is not liner. C)They are more water soluble. D) They form dimers that are relatively stable. 3) Cholestrol belongs to the …… group of lipids. A)Steroid. B)Phospholipid C)Tricylglycerol D)Wax E)Phostaglandin. 4)Write the reaction for neutralization of b-hydroxybutyric acid with NaOH. 5)Carbon monoxide binds to hemoglobin 140 times more strongly than oxygen does. what does this tell you about the equilibrium constants for the two reactions of hemogolobin with carbon monoxide and oxygen? A) the equilibrium constant for the binding of qxygen is greater. B) The concentration of carbon monoxide at equilibrium is twice that of oxygen. C) The equilibrium constant for the binding of CO is greater. D)Oxygen and carbon monoxide have the same formula mass. E)oxygen and carbon monoxide react with hemoglobin in different fashions. 6)How do sugars form cyclic hemiacetals? A)A molecule of sugars reacts with itself. B) A molecule of sugar reacts with an added aldehyde. C)Two molecules of sugar react with one another. D)A molecule of sugar reacts with an added alcohol. E) A sugar molecule decomposes. TOTAL Question (Five Multiple Choice) 1 ( Formula writing)”
a 27.7 sample of CO2(g) was collected over water at 25 degree celcius ans 1atm.What pressure due to CO2(g) (the vapour pressure of water at 25c is 23.8 torr? what will the volume be of CO2 be at the same temp and pressure after removing the water vapour
Which of the following elements will have the same number of core electrons as P? a. calcium b. nitrogen c. arsenic d. zinc e. chlorine
How much heat is produced by the complete combustion of 300 g of CH4?
If a bottle of nail polish remover contains 180 of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 .
A calorimeter contains 16.0 of water at 13.0. When 2.20 of (a substance with a molar mass of 66.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 25.0. Calculate the enthalpy change, , for this reaction per mole of . Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.
a. Which of the following correctly pairs the spectral series with its wavelength range? 1. Balmer, wisible 2. Brackett, x-ray 3. Ritz-paschen, long-wave infared 4. lyman, short-wave infared 5. ritz-paschen, UV
What is the Mn:O mole ratio in Mn2O5
Organic hydrogenation reactions, in which H2 and an “unsaturated” organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 150. kJ is given off per mole of C2H4 reacting, how much heat is released when 14.7 kg of C2H6 forms?
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