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Suppose you have a cube of copper metal that is 0.236cm on a side with a mass of 0.1206 g. If you know that each copper atom (radius = 128 pm) has a mass of 1.055 x 10^-22, how many atoms are there in this cube? What fraction of the cube is filled with atoms? Why is there "empty" space in the lattice?
calculate the number of ATP molecules that can be harvested during the complete oxidation of an 18-carbon fatty acid
a sample of nitrogen gas occupies a volume of 3.87 liters at 52.8oc and 2.11 atm. what will the new temperature in degc
If 5.45mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram
The rate constant for a particular second-order reaction is 0.47 M-1 s-1. If the initial concentration of reactant is 0.25 mol/L, it takes _____ s for the concentration to decrease to 0.13 mol/L.
exactly 18.9 ml of water at 26.0 c are added to a hot iron skillet. all of the water is converted into steam at 100c.
Sand consist mainly of silicon dioxide. When sand is heated with an excess of coke (carbon), pure silicon and carbon monoxide are produces. Write a balanced equation for the reaction
consider the following reaction2n2og rarr 2n2g o2gin the first 15.0 s of the reaction 1.7times10-2nbspmol o2nbspis
The reaction for the decomposition of dinitrogen monoxide gas to form an oxygen radical is: N2O--->N2 + O2. If the activation energy is 250 kj/mol and the frequency factor is 8.0 x 10^11 s^-1, what is the rate constant for the first order reaction..
Phosphorus-32 is used in the form of Na2HPO4 in the treatment of chronic myeloid leukemia, among other things. (a) The isotope decays by beta-particle emission. Write a balanced equation for this process.
The test tube contained some water (besides the metal) that was subsequently added to the calorimeter. Considering a higher specific heat for water, will the temperature change in the calorimeter be higher, lower, or unaffected by this technique e..
Using the periodic table only, arrange the members of each of the following sets in order of increasing bond strength.
The purity of a 0.287 -g samole of Zn(OH)2 is determined by titrating with a standard solution, requiring 37.8 mL. The HCL solution was standardized by precipitating AgCl in a 25.0-mL aliquot
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