How many molecules are contained ın each of the following samples? (a) 1.9 kg OClb (b)...
Calculate the number of molecules present in each of the following samples. (a) 0.650 mol acetylene, C2H2, a fuel used in welding (b) How many molecules are in a snowflake containing 9.00 10-5 g of H2O (c) a 100. mg tablet of vitamin C, C6H8O6 NOTE THE UNITS OF mg. (d) how many ATOMS are in the vitamin C sample in part (c)? (d) how many ATOMS of oxygen are in the vitamin C sample in part (c)?
how many molecules are contained in a 7.05
How many molecules are contained in a 7.05-g sample of dimethylmercury? Express your answer in molecules to three significant figures. What is the percentage of mercury (by mass) in the sample? Express your answer as a percent to four significant figures.
How many molecules are contained in each of the following number of moles? Report your answer using two significant figures. a. 5.6 mol of penicillin molecules b. 0.84 mol of NH3 molecules a. × 10 molecules
How many grams of phosphorus are contained in 18.9g of K_3PO_4? How many molecules of CusO_4 are in 74.92g of the substance? Calculate the percent composition of each element in the following compounds. a. Fe_2O_3 b. AI_2(CrO_4)_3 c. (NH_4)_3PO-3
How many H2O molecules are contained in 1.50 L of water? Assume the density of water is 1.00 g/mL. How many H atoms are contained in 1.50 L of water? Assume the density of water is 1.00 g/mL. please show work, thanks
Name EXERCISE D (continued) S. How many molecules of sulfrie acid are contained in 14 mmol of sulfuric acid? How many atoms of oxygen are in this sample? 6. A sample of nitrogen gas weighs 130 g. Write the chemical formula for nitrogen gas. How many molscules of elemental nitrogen is this? How many atoms of nitrogen are in this sample? 7. Consider sample (A) containing 5.99 x 10 molecules (formula units) of ammonium carbonate and sample (B) containing 93.5...
D How many moles and how many molecules of zinc chloride are in a weighing 89.5 g? A) 0.432 mol, 2,60 x10-24 molecules B) 0,887 mol, 5.34 x 1023 molecules C)0657 mol, 4.0 x 1023 molecules D) 0.887 mol, 4.0 x 1024 molecules 8) Which of the following underlined items is not an intensive property? A)A chemical reaction requires 3.00 g of oxygen. )Solid copper hydroxide is blue colored C) The density of heliumm at 25 C is 1.64 x...
How many atoms are contained in each of the following? 6.7 g CO2 ?
How many molecules of liquid ethyl mercaptan, C2H6S, are contained in a 1.0 ?μL sample? The density of ethyl mercaptan is 0.84 g/mL. (show all work)
How many grams of Pb are contained in a mixture of 0.155 kg each of PbCl(OH) and Pb2Cl2CO3?