What is the mass (in g) of 0.253 moles of manganese(IV) arsenate? Type your answer rounded...
Mass of empty beaker 55.202 g. Mass of beaker plus manganese 55.276 g. Mass of manganese used 0.074 g. Moles of manganese used??? Theoritical yield of manganese (II) chloride (moles) ??? SYNTHESIS B - MANGANESE(II) CHLORIDE Laboratory Report Observations, Data and Calculations 1. (2 marks) Describe your observations of the action of the hydrochloric acid on the manganese. 2. (3 marks) Fill in the data table: mass of empty beaker mass of beaker plus manganese mass of manganese used moles...
What is the mass in grams of manganese in 0.272 g of Mn3O4? Answer with three decimal places and the correct units, abbreviated.
The masses of several pennies was determined to be 2.575 g, 2.443 g, 2.504 g, 2.403 g, and 2.543 g. What is the standard deviation of these measurements? Type your answer rounded to the 4th decimal place without units (ex. N.NNNN). Note: even though the reading indicates that standard deviation usually rounded to 1 significant figure, on this question you will enter your answer rounded to the 4th decimal place, even if that means it has 2 or 3 sig...
Manganese(IV) oxide reacts with aluminum to form elemental manganese and aluminum oxide: 3MnO2+4Al→3Mn+2Al2O3 What mass of Al is required to completely react with 30.0 g MnO2?
A students weighed out 10.043 g aniline and reacted it with 40.497 g pyridinium tribromide. In the end, they isolated 23.617 g pure 2,4,6-tribromoaniline. What was their percent yield? Type your answer rounded to the second decimal place without units or a percent sign (ex N.NN)
A student weighed out 0.438 g anthracene and dissolved it in 5.14 mL xylene. They then added 0.269 g maleic an hydride, fit the flask with a reflux condenser and let the reaction reflux for 30.9 min. They isolated 0.582 g of product crystals. What was their percent yield? Type your answer rounded to the first decimal place (ex NN.N) without units or a percent sign.
A student weighed out 0.429 g anthracene and dissolved it in 5.27 ml xylene. They then added 0.213 g maleic anhydride, fit the flask with a reflux condenser and let the reaction reflux for 27.4 min. They isolated 0.534 g of product crystals. What was their percent yield? Type your answer rounded to the first decimal place (ex NN.N) without units or a percent sign.
How many moles of NaF are in 56.5 grams of a 25.3% by mass NaF solution? Use 41.99 g/mol for the molar mass of NaF. Enter your answer without units. Type your answer...
How many moles of NaF are in 58.1 grams of a 35.9% by mass NaF solution? Use 41.99 g/mol for the molar mass of NaF. Enter your answer without units. Type your answer D
2 points How many moles of NaF are in 54.5 grams of a 33.3% by mass NaF solution? Use 41.99 g/mol for the molar mass of Naf. Enter your answer without units. Type your answer. Previous Next