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Determine the number of grams H2 formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41 x 1023 atoms of Fe according to the following reaction. 2 HCl(aq) + Fe(s) ? H2(g) + FeCl2(aq)
What volume of pure oxygen gas (O2) measured at 546 K and 1.00 atm is formed by complete dissociation of 0.7 mol of Ag2O? 2 Ag2O(s) → 4 Ag(s) + O2(g)
a) What is the molarity of the acetic acid? b) If the density of the vinegar is 1.006 g/cm3, what is the mass percent of acetic acid in the vinegar.
An Element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an isotope with 205.9745 amu, 22.10% of an isotope with mass 206.9766 amu. Calculate the average atmoic mass and identify element.
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency \rm 1.5\times 10^{15}~Hz
A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph when he throws a fast ball. Find the de Broglie wavelength
What concentration of CO3^2- is need to initiate precipitation. Neglect any volume changes during the addition.
Why is there a difference in water soluility when looking at the structure of methyl ethyl ketone and chlorobenzene. Methyl ethyl ketone has a water solubility of 268 g/L, while chlorobenzene has a water solubility of 0.47 g/L.
concentrated sulfuric acid used in the labortory is 95% by mass. calculate the mass of water in 100-g
a. what is the orientation of the hydroxyl group when the compound is in chloroform solution? what evidence supports
What should you observe happening to the gas produced: A) If the concentration of the acid HCl is increased? B) If the solid calcium carbonate is in powder form
The molar volume of Al2O3 at 25°C and 1 atm is 25.715 cc/mole. Its coefficient of thermal expansion is 26·10-6 K-1 and the coefficient of compressibility is 8.0·10-7 atm. Estimate the molar volume of Al2O3 at 400°C and 10 kilobars pressure.
Percent Mass and Stoichiometry, You are the science officer on the Starship Enterprise. The ship is circling a new planet. The away team comes back with some rocks and minerals
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