A molecule of an unknown substance has a mass of 1.75⋅10−211.75⋅10-21 grams. What is this substance's molar mass?
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A molecule of an unknown substance has a mass of 1.75⋅10−211.75⋅10-21 grams. What is this substance's...
You have an unknown substance that contains three elements: carbon, hydrogen, nitrogen. Your burn 7.114 grams of the unknown formula in excess oxygen gas to get 10.03 g of CO2 and 10.26 g of H20. What is the empirical formula of the unknown? what is the molecular formula if the molar mass of the unknown is 248.04 g/mol?
Problem # 3: what is the molar mass of 35.0 g of an unknown substance that depresses the freezing point of 0.350 kg of water 0.50 °C? K, for water is 1.86 °C/m. [10 points
if 3.011 x 10^23 molecules have a mass of 20.04 grams, what is the mokar mass if this substance? 8) If 3.011 x 1023 molecules have a mass of 20.04 grams, what is the molar mass of this substance? A) 40.08 g/mol B) 10.02 g/mol C) 20.04 g/mol D) 6.658 x 10-23 g/mol E) none of the above
A 5.00 milliliter sample of a substance has a mass of 12.5 grams. What is the mass of a 100 milliliter sample of the same substance? Question 5 options: 40.0 g 125 g 400 g 250 g
Calculate the solubility of a molecule using Ksp values Question If a substance X has a solubility of 2.4 x 10-mg/L, and a molar mass of 188 g/mol, what is the molar solubility of the substance? Select the correct answer below: 3.8 x 10-M O 9.2 x 10 M O 1.3 x 10-10 M 4.7 x 10 "M
It takes 79.91 cal to vaporize 2.0 grams of an unknown substance. What is the enthalpy of vaporization for this substance.
An unknown substance has a mass of 43.3g and occupies a volume of 34.0 mL. What is it's density in g/mL
Determine the molar mass of an unknown non-electrolyte compound given the following data: 1.453 grams of the unknown compound is dissolved in 10.08 grams of water (Kf = 1.853 0C/m). The solution freezes at -1.47 0C. What is the molar mass of the unknown compound?
The molar mass of unknown molecular compound is determined using freezing point depression. The substance is dissolved in benzene (C6H), an organic solvent. Use the data below to determine the molar mass of the substance. 8.65 g Mass of unknown compound Freezing point of solution Volume of benzene -10.21°C 35.0 mL 5.53°C Freezing point of benzene Density of benzene Kf for benzene 0.8765 g/mL 5.12°C/m Molar mass = g/mol
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier #4 (All unknowns are nonelectrolytes, soi-1) Determination of the freezing point of pure l-butyl alcohol: (Record time-temperature data on the next page) 29.62 1. Mass of empty test tube 2. Mass of test tube and t-butyl alcohol after determination of freezing point of pure t-butyl alcohol 50.25 20.71 3. Mass of t-butyl alcohol Determination of the molar mass of an unknown: (Record time-temperature data...