A mixture contains 0.250 Mol of Mn2O3 and 20.0 g of MnO2. 1) How many atoms...

A mixture contains 0.250 Mol of Mn2O3 and 20.0 g of MnO2.

1) How many atoms of oxygen are present in the mixture?

2) How many grams of manganese are in the mixture?

Expert Solution

Mn2O3 moles = 0.250

MnO2 moles = mass /molar mass

= 20.0 / 87

= 0.230

total moles of oxygen in the mixture = 3 x 0.250 + 2 x 0.230

= 1.21

1mol contain -----------------------> 6.023 x 10^23 atoms

1.21 moles -------------------------> 1.21 x 6.023 x 10^23 atoms = 7.29 x 10^23 atoms

oxygen atoms = 7.29 x 10^23 atoms

2)

manganese moles = 2 x 0.250 + 0.230 = 0.73

molar mass of Mn = 54.93 g/mol

mass of manganese = 0.73 x 54.93 = 40.1 g

mass of manganese = 40.1 g

queen_honey_blossom answered 2 months ago

1. A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole...

1. A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2 , and an unknown quantity of He . The temperature of the mixture is 0 ∘C , and the total pressure is 1.00 atm . How many grams of helium are present in the gas mixture? 2. A gas sample has a unknown pressure with a temperature of 51 ∘C . The same gas has a pressure of 2.96 atm when the temperature...

An equilibrium mixture is 1.0 L flask contains 0.70 mol HI(g) and 0.10 mol each of...

An equilibrium mixture is 1.0 L flask contains 0.70 mol HI(g) and 0.10 mol each of I2(g) and H2(g). If 0.30 mol H2, 0.60 mol I2 and 0.20 mol HI are added to this equilibrium mixture how many moles of each gas will be present when equilibrium is reestablished?

A mixture of 20.0 mol% benzene, 5.00 mol% toluene, and 75.0 mol% air is compressed isothermally...

A mixture of 20.0 mol% benzene, 5.00 mol% toluene, and 75.0 mol% air is compressed isothermally at 70 degrees C until condensation first appears. What is the mole fraction of benzene in the condensate? You may assume that air is noncondensable (and thus its vapor pressure is large) and this system obeys Raoult's Law. Note: when solving Antoine's equation it is best to keep all sig figs through calculation and then truncate them at the end. Question options: 0.605, 0.832,...

A mixture contains 1.37x10^23 molecules PCl3 and 0.385 mol PCl5- how many grams of chlorine and...

A mixture contains 1.37x10^23 molecules PCl3 and 0.385 mol PCl5- how many grams of chlorine and how many moles of phosphorous are there?

1) How many atoms are there in 51.3 g of barium chloride (BaCl2)? 2) How many...

1) How many atoms are there in 51.3 g of barium chloride (BaCl2)? 2) How many moles of carbon monoxide (CO) are in 29.3 g of the compound? 3) What is the formula for copper(II) phosphate? Capitalization and punctuation count? 4) How many atoms of phosphorus are in 2.90 mol of copper(II) phosphate? 5) How many moles of N are in 0.191 g of N2O? 6) A sample of C3H8 has 7.68 × 1024 H atoms. How many carbon atoms...

1. 26 mol of P4O10 contains how many moles of P? ? mol P 2. How...

1. 26 mol of P4O10 contains how many moles of P? ? mol P 2. How many moles of N are in 0.247 g of H2O? ? mol N 3. How many total atoms are in 0.870 g of P2O5? ? atoms

A gas mixture in a 1.00L reaction vessel at 100ºC contains 4.5 mol of Br(g) and...

A gas mixture in a 1.00L reaction vessel at 100ºC contains 4.5 mol of Br(g) and 33.1 mol F2(g). Compte the mole fraction of each gas in this mixture. When this mixture is heated to 150ºC, Br2(g) and F2(g) react to form BrF5(g) according to the following balanced chemical reaction: Br2(g)+ 5F2(g)---------- 2 BrF5(g). At a certain point, 2.2 mol of BrF5(g) is present in this reaction vessel. Determine the mole fractions of Br2(g), F2(g) and BrF5(g) at this point...

-How many atoms are in 4.39 g of CO2? -How many molecules are there in 8.0...

-How many atoms are in 4.39 g of CO2? -How many molecules are there in 8.0 g of ozone, O3? -How many sulfur atoms are there in 21.0 g of Al2S3? -How many sulfur atoms are present in 25.6 g of Al2(S2O3)3? -Determine the number of moles of aluminum in 96.7 g of Al.

How many oxygen atoms are in 3.70 g of quartz?

How many total atoms are in 0.850 g of P2O5?

Question