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Calculate the 147Sm/144Nd ratio of a rock containing 1.83 ppm Sm and 5.51 ppm Nd. The atomic weight of Sm is 150.36 and that of Nd is 144.24. The isotopic percentage abundance of 147Sm is 15.0 and that of 144Nd is 23.954.
When ethane (C2H6) reacts with chlorine (Cl2) the main product is C2H5Cl; but other products containing Cl (chlorine), such as C2H4Cl2, are also obtained in small quantities. The formation of these other products reduces the yield of C2H5Cl. In a ..
A water solution containing 2.00 g of an unknown molecular substance dissolved in 10.00 g of water has a freezing point of 4.0°C. a. Calculate the molality of the solution.
The water level in a graduated cylinder initially at 210 mL rises to 277 mL after a piece of lead is submerged. What is the mass in grams of the lead?
A mixture of 4.0 mol of H2 and 2.0 mol of O2 is placed in a sealed evacuated container made of a perfect insulating material at 27C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
The concentration of this compound in the sample is 0.000030 M and the path length of the sample is 1.0 cm
Calculate the pH of a solution made by adding 42 g of sodium acetate, NaCH3COO, to 16 g of acetic acid, CH3COOH, and dissolving in water to make 300. mL of solution.
The nitrate ion (NO3-) is a very poor nucleophile. In fact, solvents such as water or methanol (also weak nucleophiles) are more reactive nucleophiles than the nitrate ion
How could you ascertain wheter the alcohol or the carboxylic acid furnishes the hydroxyl group that appears in the molecule of water
I need help in describing the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
Consider the reaction: 2 K(s) + 2 H2O(l) -> 2 KOH(aq) + H2(g), DH = ? The heat released when 24.9g of K reacts with excess water is 124 kJ. Determine the enthalpy change, DH, for the above equation as written
Concentration of H 2 is observed 2.15 moles/L When the reaction N 2 (g) + 3 H 2 (g) ?? 2 NH 3 (g) comes to equilibrium. Determine the numerical value of the Kc equilibrium constant?
How many valence electrons does one molecule of aspartame have? What are the bond angle measurements of aspartame?
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