A platinum (Pt) wedding band weighs 8.1 grams. Assuming the band is 100% pure Pt, how...
Be sure to answer all parts. How many mol of platinum (Pt) atoms are equivalent to one billion platinum atoms? Enter your answer in scientific notation. _×10_mol Pt (select)−11−19−9−17−13−15
a) How many atoms are in 92.2 g of pure aluminum? b) How many grams of carbon, C, would contain the same number of atoms as 39.948 g of argon, Ar? c) How many grams of S are in 785 g of SO2?
How many atoms of 12C are there in a 3.50 grams of a pure sample of this particular isotope?
Please answer 2,3,4 2. How many platinum (Pt) atoms are in a cube that is I mm on each side? What is the average volume occupied by each atom? (Divide the total volume by the number of atoms in the volume.) 3. What is the side of a cube holding exactly 1 mol of gold (Au) atoms? Assume that the equilibrium separation distance of the ions in sodium fluoride (NaF) is the sum of the Na and F ionic radii....
4 NH_3 + 5O_2 4NO + 6 H_2O How many grams of NH_3 will react with 43.4 g 02? The theoretical yield of a reaction was determined to be 23.4 g and the actual yield is 15.6 g. Calculate the %yield. Calculate the molarity of a 625 mL solution containing 12.6 g NaOH. Calculate the number of grams of glucose in 3.50 times 10^2 mL of a 15.0% solution. Calculate % (m/m) of platinum in gold ring with 12.00 g...
00 ml of 3% cresol 25. How many ml of pure liquid cresol (100%) are needed to prepare 2 solution? 26, How many ml of pure glucose (100%) are needed to make 2 liters of 6% glucose solution?
How many grams of pure iodine are in 2 liters of a 1:20 iodine solution? OA. 10g OB, 40 g ° C. 100 g D. 400 g
6) Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 °C? The freezing point for pure water is 0.0°C and Kf is equal to 1.86 °C/m.
9:41 A chromoly (a 41xx series) steel ball bearing weighs 4.224 grams. It contains the following weight fraction of elements added to iron shown in the table below. (note: all of the elements plus the iron should add up to 100 wt%). Determine how many atoms are in the ball bearing. The answer should be in units of moles with three decimals of accuracy Component weight % Sulfur Silicon Phosphorus 0.024 Manganese 0.546 Carbon Molybdenum 10.205 Chromium .925 0.043 16...
LABORATORY 10 DETERMINATION OF VITAMIN C CONCENTRATION 3. How many grams of (pure) vitamin C is contained in your unknown stock solution (Part A)? Hint: The solution is made in a 1-L bottle. 4. Consider the following titration: If 21.35 mL of 0.005 M iodine solution is needed to titrate a solution of commercial vitamin C tablet (500 mg) pre- pared in a 100-mL volumetric flask, then what is the mass (%) of vitamin C in the commercial tablet? 5....