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Q1: Discuss the various phases of matter and their physical and chemical changes.
Q2: Define atomic number, mass number, isotopes, and organize the elements by using the periodic table.
Q3: Recognize the basic concepts of organic chemistry and the classes of organic compounds.
Q4: Define chemical reactions, reactants, and products, and state the law of conservation of mass.
1. Differentiate between ionization energy, electron affinity, and electronegativity.
2. Define a catalyst and describe how it can affect the rate of reaction.
3. Explain the levels of protein structure. 4 levels with examples
While in Europe, if you drive 117km per day, how much money would you spend on gas in one week if gas costs 1.10 per liter and your car's gas mileage is 41.0km/L ?
What is the pH of a 0.125 M solution of the weak base B if (delta) H= -28.0 kj and (delta) S = -175 J/K for the following equilibrium reaction at 25 degrees C. B(aq) + H20 (l) BH+ (aq) + OH- (aq)
Using an Erlenmeyer flask with 2ml of water instead of 50ml, would it make the experimental molarity higher, lower or no change compared to the actual valve?
A 70 piece of ice at 0 is added to a sample of water at 6. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?
Determine the molar mass of the nonelectrolyte if the osmotic pressure of the solution = 23.6 atm, also express your answerin g/mol?
Question- the empirical formula of a certain compound is CHN. If the molar mass of this substance is 135 g/mol, what is the molecular formula of the compound
The C-C bond in this structure should become the C2-C3 bond in (2R,3S)-2-bromo-3-phenylpentane. Type the name of an atom or group to add to the structure, or press the atom's button. Click on an H atom to replace that H atom with the atom or group..
Isopropyl alcohol "rubbing alcohol" has a vapor pressure of 10.0 mm Hg at 2.4 degrees Celsius and 100 mm Hg at 39.5 degrees Celsius. Calculate
When an 8.00-g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 3.993 kJ•K-1, the temperature decreases by 0.360 K. Compute the molar heat of solution of KCN.
Describe all the symmetry planes in the staggered conformation of ethane. Draw a figure and arrows to show any rotational symmetry axes in the staggered conformation of ethane.
A reaction in which and react to form products is zero order in , one-half order in , and second order in .By what factor does the reaction rate change if is doubled
The turnover number for an enzyme is known to be 5,000 min-1. From the following set of data, calculate the Km and the total amount of enzyme present in these experiments.
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