Help me please UniA compound that will be produced on Mars during food productionhas a % composition of 40.002% carbon, 6.714% hydrogen, and53.284% oxygen. If the molar mass of the compound is 180.156g/mol, what is the molecular formula of the compound? (~2.

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Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter5: Gases

Section: Chapter Questions

Problem 25QAP: Cyclopropane mixed in the proper ratio with oxygen can be used as an anesthetic. At 755 mm Hg and...

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If the empirical formula of a compound is found to be CH2, which of the following value is a plausible molecular mass for the compound? The answer is 70.15. How did you get that?
In 1997, at the United Nations Conference on Climate Change, the major industrial nations agreed to expand their re-search efforts to develop renewable sources of carbon-basedfuels. For more than a decade, Brazil has been engaged in aprogram to replace gasoline with ethanol derived from the rootcrop manioc (cassava).(a) Write separate balanced equations for the complete combus-tion of ethanol (C₂H₅OH) and of gasoline (represented by theformula C₈H₁₈).(b) What mass of oxygen is required to burn completely 1.00 Lof a mixture that is 90.0% gasoline (d=0.742 g/mL) and 10.0%ethanol (d=0.789 g/mL) by volume?(c) If 1.00 mol of O₂ occupies 22.4 L, what volume of O₂ isneeded to burn 1.00 L of the mixture?(d) Air is 20.9% O₂ by volume. What volume of air is needed toburn 1.00 L of the mixture?
The human body excretes nitrogen in the form of urea,NH₂CONH₂. The key biochemical step in urea formation is thereaction of water with arginine to produce urea and ornithine.(a) What is the mass percent of nitrogen in urea, arginine, andornithine? (b) How many grams of nitrogen can be excreted asurea when 135.2 g of ornithine is produced?
Na2SO4 • XH2O If I have 0.548 g of the hydrate after weighing and 0.272 g of H2O was lost after heating the hydrate, what is the value of x for the hydrate?
An experiment requires that enough C2H5Cl be used to yield 13.9 g of chlorine.How much C2H5Cl must be weighed out?
Aluminum reacts with tellurium to form aluminum telluride. If 27.00 g of Al reactwith 95.70 g of Te, what is the theoretical yield of aluminum telluride ingrams?
1.1 It is well-known that te emission of greenhouse gasses such as carbon dioxide presents a very grave threat to the environment. Attempts are ongoing to absorb this gas by several means. One such approach involves the use of vegetation, as plants utilize the gas by means of photosynthesis. One such plant , which has shown great promise, is the "Spekboom" It has been estimated that fully-grown Spekboom can absorb 3.8 tonnes of carbon per hectare of plants per year. If the system is fully functional, South Africa can generate 234.5 x 109 kWh of electricity per year. Assume that 1559 pounds of CO2 is emmited per year per Megawatt-hour of electricity generated in the country. Determine, by means of the use of conversion factors, how many square kilometres of Spekboom could theoretically absorb all of this carbon dioxide ? 1.2 Consider the molecule, ClPO2 (The Phosphorus atom is the central atom) 1.2.1 Draw the 3-D Lewis dot structure of the molecule, including all possible resonance…
A 15.152-gram sample of a hydrate was heated to drive off the water, leaving Al(NO3)3 (s) with a mass of 8.603 grams. Calculate the value of in Al(NO3)3•nH2O (s).
a) Calculate the molar mass of sucrose, C12H22O11.(b) How many moles of sucrose are present in: (i)1.00 gram; (ii) 1.00 pound, and (iii) 1.00 kg of sucrose?(c) How many sucrose molecules are present in a 4.536-gsampleof sucrose?(d) How many atoms of carbon, hydrogen, and oxygen,respectively, are present in 4.536 g of sucrose?(1 lb = 453.6 g; Avogadro’s number = 6.022 x 1023/mol)
The active ingredient in Tum is calcium carbonate. a). What is the chemical formula of calcium carbonate?. b, what is the molar mass of calcium carbonate? c. How many moles of calcium carbonate are in one roll of Tums that contains 12 tablets? d). If the Daily Value (DV) for Ca^2+ to maintain bone strength in older women is 1500 mg, how many Tums tablets are needed each day? f). What is the mass percent composition of calcium carbonate?.
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