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Chemistry Questions
Calculate the mole fraction of ethyl acetate, in a toluene-ethyl acetate mixture if you mix 1...
Which of the following substances will react more strongly with each other (select the best reducing...
How can you calculate the heating value of liquid propane? Please show an equation
Data: 8.0 grams of CuSO4 • 5H2O in a 125 mL Erlenmeyer flask: 8.130 grams 1)...
Describe the chemical structural features that can increase the crystallinity of the polymer.
Example of electron donating and electron withdarwing groups are: (a) -CH3, -NH2 (b) -OCH3 and -CH3...
What is reverse phase and which compound will eluted first (acetamide, acetone,, and dichloroetane) in a...
Which reaction(s) will have a positive entropy change? Select all that apply. Entry field with incorrect...
What are enzymes and what do they do for the cell? Why does a cell need...
Data Record 1. Temperature of the water = ______18___ oC 2. Table for recording mass of...
3. An enzyme can catalyze a reaction with either of two substrates, S1 or S2. The...
3. A naturally occurring acidic red pigment extracted from the cochineal insect contains only carbon, hydrogen...
13) a 0.10 HF solution is 8.4% ionized. Calculate the H+ ion concentration. Someone solve this...
the titration of an impure sample of KHP found that 36.0 ml of 1.00M NaOH was...
Many metabolic reactions are coupled reaction. Such as the first step in glycolysis drawn below: Glucose...
Hydrocarbon mixtures are used as fuels. What mass of CO2 gas is produced by the combustion...
Swimmers experience decrease in visibility on diving to greater depths. Given that the mean molar absorption...
For a particular reaction, delta H is 67.6 kJ/mol and delta S is 126.9 J/(molk). Assuming...
rank Ca, Cu, Fe, Mg, Sn, and Zn in terms of increasing reactivity. rank most (if...
Each electron in an atom may be described by a set of four quantum numbers. For...
Determine the enantiomeric excess of this lab experiment: NOTE: Please be through in your explaination Racemic...
A liquid has an enthalpy of vaporization of 30.8 kJ/mol. At 273 K it has a...
An electron in an excited state of a hydrogen atom emits two photons in succession, the...
Consider a solution of 0.36 M C2H5NH2 (Kb = 5.6×10-4). Decide if each of the following...
What is the pH of a 0.25 M solution of KCOOH?
Bacteriorhodopsin is a protein found in Halobacterium halobium that converts light energy into a transmembrane proton...
Are the following compounds organic or inorganic? 1. barium nitrate 2. sodium chloride 3. potassium nitrite...
Using 0.200 ml H2O2 10 mL H2SO4 (aq) 1 M Solution titrated with KMnO4(aq) 0.20M In...
Substances tend to diffuse from higher to lower concentrations. So why is is that during osmosis,...
A lignite coal has the following ultimate analysis on the dry basis: C =...
10.0 mL of a Cu2+ solution of unknown concentration was placed in a 250 mL Erlenmeyer...
An aqueous solution containing 5.93 g of lead(II) nitrate is added to an aqueous solution containing...
Surface tension accounts for which of the following observations? a) liquids can be used in hydraulic...
What is the value of the equilibrium constant, K for a redox reaction involving the transfer...
Calculate the pH at the equivalence point for the titration of 0.110 M methylamine (CH3NH2) with...
what are the maximum numbers of electron in the following? A)n=4, L=3 B) n=2, L=1, ML=0...
1) You pipet a known amount of this standardized HCl into a 15 cm sample tube...
Methyl m- and o-methylbenzoates give nearly identical Electron Impact mass spectra with the exception of the...
What feature of a reaction would ensure that its rate would respond to a pressure jump?
Strain, Thomas and Katz measured the molar absorptivity of chlorophyll a in 1963 and obtained a...
WHat is the pH of MgF2 in water if the Ksp for MgF2 is 6.4*10^-9 for...
A 1.00g sample of the rocket fuel hydrazine N2H4 is burned in a bomb calorimeter containing...
According to a recent study1, it takes between 5.6 and 10.2 million joules of energy to...
In some communities the amount of arsenic (As3+) in the water supply has become an important...
Having trouble with this lab. This is the table. I am trying to figure out the...
An atom of 81^Br has an experimentally determined nuclear mass of 80.9163 amu. Calculate the mass...
What is photosyntheis?
ΔGo = 775 kJ for the vaporization of boron carbide: B4C (s) = 4 B (g)...
Briefly describe how it would be possible to experimentally determine the heat of ionization for the...
An organic compound contains carbon, hydrogen, and sulfur. A sample of it with a mass of...
Lactic acid builds up during exercise. A 1.00 gram sample of this acid required 25.88 mL...
1. Chapter 12 Question 1 - True/False Part A Intermolecular forces are the attractive forces between...
Part A: The frequency of green light is approximately 6.0*1014 s-1. The mass of an electron...
A compound has an M+ ion at 122 amu. There is no M+2 peak. The height...
What is the percent ionization of a 0.456 M aqueous solution of hydrosulfuric acid? Ka1 =...
Explain the basis for each of these limitations on the oxidation states in which certain elements...
Carbon monoxide gas reacts with hydrogen gas to form methanol. CO(g)+2H2(g)→CH3OH(g) A 1.10 L reaction vessel,...
State 2 differences you will expect to see in the electronic spectrum of bromine gas and...
Shown below are the reactions occurring in the direct methanol fuel cell (DMFC). I 2 CH3OH(aq)...
what is the role of the calcium oxide (quicklime) in the protein test?
PF5 possesses ___ C2 axis and____ mirror planes of symmetry. (A) 0, 3 (B) 0, 4...
A solution of NaSCN is added dropwise to a solution that is 0.0821 M in Hg22+...
Which of the following combinations is not suitable for making a buffer? A. Na2CO3 and NaHCO3...
Which will have the smallest temperature change for a given addition of energy? Select one: a....
Calculate the De Broglie wavelength of a bucky-ball, a spherical molecule with molecular formula of C60,...
Be sure to show all of your work and when performing calculations, report answers to the...
A buffer solution contains 0.56 mol of ascorbic acid (HC6H7O6) and 0.54 mol of sodium ascorbate...
5.0 moles of NH3 and 5.0 moles of H2 are introduced into a 4.00L flask. At...
Please, What is alcohol in chemistry and biology and what is the types of alcohol ?...
Using the bond energies below determine the value and sign of delta H for 2H-Br +...
If the pH of a 1.00-in. rainfall over 1300miles2 is 3.20, how many kilograms of sulfuric...
A single “unit” in Nylon 66 is made from one diaminohexane molecule and one adipoyl chloride...
Calculate the number of Ag nanoparticle having a 5 nm radius.?
What bonds are broken and what bonds are formed in the synthesis of: a.Nylon 66 b.Glyptal...
O2 molecules can dissociate to form O atoms by absorbing electromagnetic radiation. If it takes 498...
A certain quantum mechanical system has the energy levels shown in the accompanying diagram. The energy...
How does surface energy influence protein adsorption? Think of contact angles to base your answer from.
If you mix equal volumes of 0.1 M HCl and 0.2 M TRIS (free amine form),...
To resolve an object in an electron microscope, the wavelength of the electrons must be close...
How many Square Kilometers are eqiuvalent to 28.5cm squared
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