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Which of the following underlined items is not an intensive property (a) A chemical reaction reqyuires 3.00g of oxygen (b) Solid copper hydroxide is blue colored (c) the density of helium at 25degree celsius is 1.64X 10-4b/cm3 (d) the melting poit of aluminun metal is 933k 2- The diameter of the nucleus of an atom is approximately 1X10-15 meters if 1 nm is equal 11 angstroms what is the diameter of the nucleus in Angstroms? (a) 1x10-23A (b) 1X 10-8A (c) 1X10-7A (d) 1X10-5A (3) A gold ingot weight 5.50lbs if the density of gold is 19.31g/cm3 and the length and of the ingot are 12.0 and 3.00cm respectively what is the hight of the ingot (a)6.50X 10-3 cm 9b) 3.59cm (c) 11.2cm (c) 1.34X10^3cm
Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 25.0 L.
Which formula represents a salt?
Suppose that Mt=Lt=0.1M (exactly) and the pH is somehow fixed at 5.00. (This means that the charge balance no longer applies.) Use the equilibria and the two mass balances to find the concentrations of ML+, M+2, L-, HL.
Will the volume of a gas decrease, increase, or remain unchanged for each of the following sets of changes? a) The pressure decreased from 4 atm to 1520 mm Hg, while the temperature is decreased from 250°C to 212°F. b) The pressure is increased fr..
NH4CO2NH2(s)->2NH3(g) +CO2(g) (at equilibrium) starting with only the solid it is found at 40C the total gas pressure is 0.363 atm calculate equilibrium constant Kp
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing ?, ?, and lone pair electron orbital.
how many grams of cacl2 should be dissolved in 500 ml of water to make a .20 m solution of calcium
explain a resting nerve cell membrane sodium-potassium pump action potential and what wil happen if sodium channels
Calculate the potential of the cell. Indicate whether the reaction will proceed spontaneously in the direction considered (oxidation on the left, reduction on the right) or an external voltage source is needed to force this reaction to occur
A single pulse of a laser yields an average of 5.00 multiplied by 1018 photons with = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
the reaction 2ararrbc has a kc of 0.2. the reaction is commenced with initial con- centrations a 0.2 m b 0.2 m and c
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