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Question 39 (1 point) 0.117 mol of a particular substance weighs 21.9 g. What is the...
What is the molar mass of a particular compound if 0.087 mol weighs 5.16 g?
In a boiling point elevation experiment, the number of mol of a nonionizing, nonvolatile solute dissolved in benzene is 0.00176 mol. The mass of the solute is 3.55g. What is the approximate molar mass of the nonionizing, nonvolatile substance? Consider amu equivalent to g / mol (molar mass ) A. 20,000 amu B. 20 amu C. 2000 amu D. 500 amu
mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of the substance, in units of g/mol? (1) 228 g/mol (2) 17.1 g/mol (3) 4.38 x 10 g/mol (4) 62.8 g/mol 10. Identify the correct net ionic equation for the reaction that occurs when solutions of Ba(CIO) and KSOiare (1) Ba?"(aq) + SO2(aq) +BaSO4(s) (2) 2K (aq) + 2CIO (aq) - K(CIO)a(s) (3) Kla) ClOc(aq) - KCIO (S) (4) Bal(aq) + (aq) + SOP(q)- kBaSO4(6)...
A 0.117 g sample of a monoprotic acid is dissolved in water and titrated with 0.100 M KOH. What is the molar mass of the acid if 13.0 mL of the KOH solution is required to neutralize the sample? molar mass: g/mol
What is the identity of substance X if 0.380 mol of X weighs 17.5 g? ОА. N2O4 O B. NO3 ос. No2 ор. N20
An unknown sample weighs 0.2436 g was dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL). The freezing point depression (∆Tf) was 2.5°C. Calculate the molar mass of the unknown substance. (Kf = 20.5 °C/m) ∆Tf = Kf m where Kf is the freezing point depression constant and m is molality. 526 g/mol 1.50 g/mol 128 g/mol 2.44 g/mol
If the molar mass of a substance is 44.01 g/mol, what is the mass of 1.05 x 1024 molecules of the substance? HTML Edita T. x : A 6.25 g sample of magnetite (Fe3O4) contains 4.52 g of Fe. What are the percentages of iron and oxygen in magnetite? HTML Editor Calculate the number of moles of NaHCO3(sodium bicarbonate, or baking soda) in a 5.0 g sample of this substance. A chemical reaction requires 3.50 moles of copper(II) nitrate, Cu(NO3)2....
A sample of a substance with the empirical formula XC1_2 weighs 0.5785 g. When it is dissolved in water and all its chlorine is converted to insoluble AgCl by addition of an excess of silver nitrate, the mass of the resulting AgCl is found to be 1.2794 g. The chemical reaction is XCI_2 + 2 AgNO_3 rightarrow 2 AgCI + X(NO_3)_2 Calculate the formula mass of XCI_2. Formula mass XCI_2 = g mol^-1 Calculate the atomic mass of X. Atomic...
A sample of a substance with the empirical formula XCl3 weighs 0.4393 g. When it is dissolved in water and all its chlorine is converted to insoluble AgCl by addition of an excess of silver nitrate, the mass of the resulting AgCl is found to be 1.1926 g. The chemical reaction is XCl3 + 3 AgNO33AgCl + X(NO3)3 (a) Calculate the formula mass of XCl3. Formula mass XCl3 = g mol-1 (b) Calculate the atomic mass of X. Atomic mass...
Substance 1: Physical description: This substance is a lustrous, gray substance. Chemical information: Observed melting point: 2065-2070°C Observed boiling point: 2,972-2975 °C Estimated molar mass: 102 g/mol Density: 3.95 g/cm Solubility in water: Insoluble Other: This substance is a thermal conductor but an electrical insulator. This substance is very hard and abrasive. Spectroscopic information: There is no 'H or 13C NMR data for this substance. Sources: