A 0.271-g sample of a gaseous hydrocarbon (CxHy) occupies 226 mL at 22.0 ºC at 735 torr. Calculate the molar mass of this hydrocarbon in g/mol. Express your answer as a number (not scientific notation) without units; for full credit, the last digit of your answer should be within ±1 of the correct value, with an appropriate number of significant figures.
Molar mass: Answer g/mol.
Complete combustion of 1.532 g of this gaseous hydrocarbon (CxHy) yields 4.484 g of carbon dioxide and 2.754 g of water. Calculate the moles of C and H in this amount of the hydrocarbon. Express your answers as a number (not scientific notation) without units; for full credit, the last digit of your answer should be within ±2 of the correct value, with an appropriate number of significant figures.
Answer moles C in CxHy
Answer moles H in CxHy
Determine the empirical and molecular formulas of this hydrocarbon. If a subscript in the formula is "1", enter it explicitly.
Empirical formula: CAnswerHAnswer.
Molecular formula: CAnswerHAnswer.
A 0.271-g sample of a gaseous hydrocarbon (CxHy) occupies 226 mL at 22.0 ºC at 735...
Gaseous hydrocarbon A 0.271-9 sample of a gaseous hydrocarbon (CxHy) occupies 117 mL at 22.0°C at 735 torr. Calculate the molar mass of this hydrocarbon in g/mol. Express your answer as a number (not scientific notation) without units, for full credit, the last digit of your answer should be within 11 of the correct value, with an appropriate number of significant figures. Molar mass: g/mol. Complete combustion of 1.532 g of this gaseous hydrocarbon (CxHy) yields 4.640 g of carbon...
A 77.18 g sample of a hydrocarbon (CxHy) has a mass of carbon that is equal to 66.89 g. Given this information, determine the empirical formula of this hydrocarbon. MMC = 12.01 and MMH = 1.008) Throughout your calculations, maintain at least 4 significant figures. In each answer box place the appropriate subscript for each spoiled element which in essence conveys this compound's empirical formula.
Strychnine is a poisonous alkaloid with a molecular formula of C21H22N2O2. What is the molar mass of strychnine (g/mol)? Give your answer to 4 significant figures. (Use C = 12.01 g/mol, H = 1.01 g/mol, N = 14.00 g/mol and O = 16.00 g/mol). Do not use scientific notation, do not include units in your answer, just write the number).
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2. Express your answer numerically in moles. 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 100 g of chlorine gas. Express the quantity in moles to three significant figures. 3) Sodium hydroxide, NaOH, is a strong base that is used in industrial synthesis and processes such...
0.8 pts Question 5 Complete neutralization of 25.00 mL of 0.15 15 M H2SO4 solution requires moles of KOH and forms grams H2O. (Hint: write the balanced equation first) (Report your answer with 4 significant figures. Do NOT express your answer in scientific notation) (Molar Mass H2O = 18.016 g/mol)
What is the formula mass of sodium chloride (in units of g/mol)? Use two decimal places in atomic masses. Only give the numeric value of your answer. o Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5e5 for 2.5 x 10") Type your response
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2. Express your answer numerically in moles. 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 100 g of chlorine gas. Express the quantity in moles to three significant figures. 3) Sodium hydroxide, NaOH, is a strong base that is used in industrial synthesis and processes such as...
ercent Composition, Empirical and Section 3 - Calculations (Moles, Percent Composition, Emp Molecular Formulas) In order to earn full credit, you must show your work clearly, include units significant figures 1. (pts) You are given 3.50g of TNI, CHN Tou are given 3.50g of TNT. C-HSN:0. Use this starting amount to determine the quantities requested below. k clearly, include units and use reasonable a) Determine the molar mass of TNT: g/mol (no work necessary for this one). b) Determine the...
i need help with questions 4, 5, 13, 15, 16 6 pts Question 4 Perform each of the following calculations of the measured numbers and express your answer rounded to the appropriate number of significant figures. Only type the number for the final answer in the box (no units). a) 67.50 mL - 35.50 mL mL b) 5.35 cm x 10.00 cm x 0.50 cm = cm Question 5 4 pts A scientist defines a new unit, the mini-meter, which...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...