Chemistry
Chemistry A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted? PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET A GOOD DISCOUNT 🙂
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Chemistry A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted? PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET A GOOD DISCOUNT 🙂
Chemistry A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted? PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET A GOOD DISCOUNT 🙂
Science 1.Nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.41 g/mL. How much of the concentrated stock solution in milliliters should you use to make 2.5 L of 0.500 M HNO3? 2. Complete the table. [H3O+] [OH-] pOH pH Acid or Basic 1.0 * […]
Chemistry 1. Which of the following chemicals is toxic but useful? 2. Which of the following chemical is sweet smelling but narcotic? 3. Hexanal can be oxidized to a(n) ? 4. If propanoic acid reacts with what to become ethylpropanoate? 5. Pentenol is an example of an aldehyde. (T/F) 6. A Heptanone can be oxidized […]
Stoichiometry 1. How many grams of hydrogen gas are produced upon complete reaction of 4.6 moles of sodium with water? What assumption must you make concerning the water?Sodium oxide is the other product. 2. How many moles of water are produced from the complete combustion of 3.21 x 10-4 mg of propane(C3H8)? What is the […]
Chemistry A student following the procedure in this experiment prepared three solutions by adding 11.50, 23.00, and 34.50 mL of a 7.60 x 10-2M NaOH solution to 50.00 mL of a .112M solution of a weak acid. The solutions were labeled 1, 2, and 3 respectively. Each of the solutions was diluted to a total […]
Environmental Chemistry 1. What are the five major classes of material making up the composition of atmospheric aerosol particles? Why are they so important? 2. The size distribution of particles emitted from coal-fired power plants is bimodal (is it?). What are some of the properties of the smaller fraction in terms of potential environmental implications? […]
Chemistry Subject #1 : Considering the schematic below for Water: Condensation @ 100 ºC \ Freezing @ 0 ºC \ Gas / Steam ======================= Liquid ==================== Solid / Ice \ Boiling @ 100 ºC \ Melting @ 0 ºC a) Draw a plot (with Temperature in Celsius degrees on the y-axis and Time in minutes […]
Chemistry assignment Complete the data table with the measured and calculated results. Solution pH [H+] [X-]eq [HX]eq Ka pKa log{[X-]eq/[HX]eq} 1 2 3 4 5 6 Show a sample calculation for each column for trial 1 here: Results: 1. Calculate the average value of pKa. 2. Graph the values of pH vs. log{[X ]eq/[HX]eq}. (Be […]
Chemistry 1. Experimental evidence suggests that the nitrogen atom in ammonia, NH3, has four identical orbitals in the shape of a pyramid or tetrahedron. a) Draw an energy-level diagram to show the formation of these hybrid orbitals (hint: no electron promotion is required) b) Name the type of hybrid orbitals found in NH3, of the […]
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