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the memory metal, nitinol, is a alloy of nickel and titanium. It is called a memory metal because after being deformed, a piece of nitinol wire will return to its original shape. The structure of nitinol consists of a simple cubic array of Ni atoms and an inner penetrating simple cubic array of Ti atoms. In the extended lattice, a Ti atom is found at the center of a cube of Ni atoms; the reverse is also true. a) Describe the unit cell for nitinol b) What is the empirical formula for nitinol? c) What are the coordination numbers (number of nearest neighbors) of Ni and Ti in nitinol?
Sodium chloride has a solubility of 35.7g/100mL water. If you have 350mL of water and you add 115g of sodium chloride to it and mix well
Determine the error in the molar mass of Mg(ClO4)2. If 0.982(+/- 0.002)g is dissolved in a 250 mL (+/-0.08 mL) volumetric flask and water added to the mark, what is the concentration and error in the concentration of ClO4-?
A chemist burns 160 g of aluminum in oxygen to produce aluminum oxide. She produces 260 g of aluminum oxide. Write a balanced equation and calculate the theoretical yield and percent yield.
How many grams of oxygen (O2) are needed to completely react with 2.40 g of propane (C3H8) according to the equation below?
What would the potential of a standard hydrogen (S.H.E.) electrode be if it was under the following conditions?
If you wanted to make a 3 liter solution of 500 mM formic acid buffer at ph 3.9 how many grams each of sodium formate (MW=68g/mol) and formic acid (MW=46g/mol) would you add... 98.6 g sodium formate and 2.3g of formic acid or 20.2 sodium formate
write a balanced equation for the reaction that occurs between the solutes. Calculate the concentration of each remaining ion in solution. Is the resultant solution acidic or basic
A helium balloon is filled to a volume of 2.5 L at atmospheric pressure. If the balloon is placed inside a sealed container and the pressure is reduced to 455 torr.
Calculate the standard heat of reaction, or , for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero.
Phosphorus donor atoms with a concentration of 10^16 cm^-3 are added to a pure sample of silicon. assume that the phosphorus atoms are distributed homogeneously throughout the silicon.
Calculate the kg of fuel used for 100 kg mol of outlet ?ue gas and the kg mol of air used. (Hint: First calculate the mol O2 added in the air, using the fact that the N2 in the ?ue gas equals the N2 added in the air. Then make a carbon balance to ..
A mixture of 2.0 mol of H2 (g) and 1.0 mol of O2(g) is placed in a sealed evacuated container made of a perfect insulating material at 25 C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
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