7. A compound is composed of carbon, hydrogen and oxygen. It was analysed and the folloWIng results were obtained: o Mass of sample = 30.50 g o Mass of carbon in sample = 12.08 g o Mass of hydrogen in sample 2.06 g a. Find its empirical formula. b. If the relative molecular mass of the compound is 180, find its molecular formula.

7. A compound is composed of carbon, hydrogen and oxygen. It was analysed and the folloWIng results were obtained: o Mass of sample = 30.50 g o Mass of carbon in sample = 12.08 g o Mass of hydrogen in sample 2.06 g a. Find its empirical formula. b. If the relative molecular mass of the compound is 180, find its molecular formula.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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To increase the body's metabolic rate the human body uses a hormone name epinephrine. The experimental analysis concluded that the hormone composes of carbon, hydrogen, oxygen, and nitrogen. The percentage composition of the hormone is 59.0% carbon, 7.15% hydrogen, and 26.2% oxygen. Determine the empirical formula. Select one: O a. COH13NO3 O b. C3H1103 O c. C18H26NO4 O d. CoH1304 O e. COH13N2O3 Consider two organic molecules, isopropanol, and hexane. One dissolves in water and the other G 4x 72%
To increase the body's metabolic rate the human body uses a hormone name epinephrine. The experimental analysis concluded that the hormone composes of carbon, hydrogen, oxygen, and nitrogen. The percentage composition of the hormone is 59.0% carbon, 7.15%% hydrogen, and 26.2% oxygen. Determine the empirical formula. Select one: O b. C18H26NO. Oc CgH 30 CHiN2O
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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
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A 2.25 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was combusted in excess oxygen. This produced 1.27 g CO₂ and 0.778 g H₂O. A second sample of this compound with a mass of 4.93 g produced 5.05 g SO3. A third sample of this compound with a mass of 7.75 g produced 3.13 g HNO3. Determine the empirical formula of the compound. Enter the correct subscripts on the given chemical formula. empirical formula:
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