Show all of the work used to solve this problem. 4. (i) K2Cr2O7 + 4 NH4Cl + 3 H2SO4 ——— K2SO4 + (A) (B) Sublime. 33. 21. Academia.edu is a platform for academics to share research papers. If a flashbulb contains 3 5.4 X 10- grams of aluminum, what mass of oxygen must be present for complete combustion of the aluminum? If there are 'x' atoms in 5 grams of carbon, how many atoms are there in 5 grams of silicon? Molarity is the concentration of x moles of solute in 1 L of solution. 5. Glucose and urea are non electrolytes. Thus, the statement (d) is wrong for gases. Solutions with varied molarities have different properties i.e., a low molarity acid and high molarity acid can react differently and at … The Solution is evaporated till crude, crystalline mass of ammonium chloride is obtained. Explain your answer. Cheap paper writing service provides high-quality essays for affordable prices. So mass of a gas can be determined by weighing the container in which it is enclosed. Equivalent weight of NaOH is ~ 40.0 g i.e. About 1837 electrons are equal in mass to the mass of one proton or one neutron. (d) : Mass of the gas = mass of the cylinder including gas mass of empty cylinder. 2. Commercially it is prepared by neutralizing ammonia with HCl. To make 1 N NaOH solution - dissolve 40.0g of NaOH in 1 litre of water. 1. NH3 + HCl ---- NH4Cl The crude salt is purified by crystallization. 62 1 mole CO 2 1 mole C g C = (19.73 103 g CO2) 44.01 g CO2 1 mole CO 2. Solution: W= itE/96500 = 1×10×60×31.75/96500. (d) : Temperature (T) = 25oC = 298 K. Aluminum and oxygen combine in a mass ratio of 9.00 to 8.00. Esha Shah 64 Ammonium Chloride Formula: NH4Cl Mol. The % SO4 2will be taken to be 1.51 times the average % Cu found in the sample on the assumption that for every mole of copper (2+) cation there must be a mole of sulfate (2-) anion. (Kf for water = 1.86 °C/mol) ... Ans. A summary of each type of particle, its mass and relative charge is shown in Table 3.1. 380 × 730 = 365 mL 760 20. 12.011 g C 3 = 5.385 10 g C 1 mole C. Similarly, the entire mass of hydrogen that was present in the original sample ends up in the products as H2O: NaCl is an electrolyte which dissolve to give ions. It might seem impossible to you that all custom-written essays, research papers, speeches, book reviews, and other custom task completed by our writers are both of high quality and cheap. Will, the mass of copper and silver, deposited on the cathode be the same or different? Equivalent mass of Cu2+ is different from the equivalent mass of Ag+ so obviously the mass of copper deposited will not be the same as the mass of silver deposited. Finally the percent by weight of water in the sample can be taken to the difference between the sum of the percent by weights of the other three species and 100%. ... How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at 14 °F ? Wt:53.49 Preparation: 1. 2. 2 Cr2O2Cl2 + 2 (NH4)2SO4 + 3 H2O. Hence the mass of carbon in the original sample must be equal to the mass of carbon that is found in the CO2. What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres? 6. sum of atomic weight - (Na — 23g) + (Oxygen — 16g) + (Hydrogen — 1g) 2.