Determine the empirical formula for each substance. A dead alkaline battery is found to contain a compound of Mn and O. Its analysis gives 69.6% Mn and 30.4% O. 2 A compound is 38.77% Cl and 61.23% O. 3 Magnetic iron oxide is 72.4% iron and 27.6% oxygen. 4 A liquid compound is 18.0% C, 2.26% H, and 79.7% Cl. The Mole and Ch

Is this correct answer?

Finding the formula

5. The molecular mass of caffeine is 194.2 g/mole. A sample was analyzed, and it was found to be 49.5 % C, 5.2 % H, 16.5 % O, and 28.8% N. What is the molecular formula of caffeine?

3. Determine mass percent of nitrogen and iron in Fe(NO3)3.

5.What is the percent by mass oxygen in (NH4)2HPO3 Group of answer choices a, 31.88 b, 48.46 c, 41.36 d, 39.55 6. What is the empirical formula of the substance containing 0.423 g C, 2.50 g Cl and 1.34 g F ? Group of answer choices a, CClF3 b, CCl3F c, C2ClF2 d, CCl2F2

D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10⁹ moles of Zn 27) 7.70 x 10-⁹ moles of Mg(NO3)2 28) 8.42 x 1027 atoms of tin 29) 6.39 x 10¹8 atoms of sulfur 30) 5.99 x 1030 molecules of SiO₂