How many molecules are contained in each of the following? (Please enter your answers in scientific notation, i.e, 1.00E+25) 2.36 mol S8 0.617 mol NH3 18.6 g of C2H5OH 1478 g of Cl2

42.161 * 1223 molecules of salt + 18.066 × 1023 molecules of sugar

What is the mass of 3.5 x 10^-3 molecules of copper (II) carbonate? Use correct significant figures and units.

Perform each of the following calculations.  You must show your work to receive credit and must must round your answer to the correct number of significant figures. How many moles are in each of the following: 1. 8.43 x 1025 atoms of Fe 2. 4.75 x 1024 molecules CO 3. 2.43 x 1020 atoms Al

Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjected to combustion analysis it produced 1.471 g CO2 and 0.226 g H20. What is its empirical formula? Attach the PDF copy of your solution with final answer following the significant figure rules and enclosed in a box.

Convert 3.45 × 1018 molecules of OF2 to grams. Convert the 15.2 moles of NH4Cl to grams. Convert the 85.0 g of CO to particles. How many oxygen atoms are in 2.50 moles of C6H12O6? Calculate the molar mass of the Pb(CO3)2 (use the periodic table). How many moles of oxygen are in 45.7 moles of potassium nitrate? Convert the 123 g of CaF2 to moles. Convert the 5.62 × 1025 atoms of B to moles.

4.88×1020 H2O2H2O2 molecules Express your answer using three significant figures.    Calculate the mass in grams of each sample.

A74.12 g sample of a hydrocarbon (CH) has a mass of carbon that is equal to 62.90 g. Given this information, determine the empirical formula of this hydrocarbon. (MMC- 12.01 and MM=1.008). Throughout your calculations, maintain at least 4 significant figures. In each answer box place the appropriate subscript for each specified element which in essence conveys this compound's empirical formula

11) Diego is saving turtles from a plastic net and must swim across 1.403 x 1034 molecules of water. How many liters of water does Diego need to swim through to get to the turtles? 12. There are 104 days in summer vacation and one of those days you go for a swim. The pool has a total of 3.0013 x 106 liters of H₂O. How many molecules of H₂O are there in the pool? How many grams of H₂O? How many atoms of oxygen are there? 100

49.410% potassium, sulfur, and 30.32% oxygen are found to be in a sample found in an unlabeled container. What is the empirical formula of this compound? . Write the K then the S then the O. • Do NOT use a ZERO to represent the O or the system will count your answer as wrong.) . You will not be able to type subscripts. Just type the numbers where they go. For example, S₂03 would be typed in as 5203.