A 26.51 gram sample of cobalt is heated in the presence of excess iodine. A metal...

A 26.51 gram sample of cobalt is heated in the presence of excess iodine. A metal iodide is formed with a mass of 140.7 g. Determine the empirical formula of the metal iodide.

Enter the elements in the order Co, I

empirical formula =

Expert Solution

mass of Co = 26.51g

mass of metal iodide = 140.7g

mass of I = mass of metal iodide - mass of Co

= 140.7-26.51 = 114.19g

no of moles of Co = W/G.A.Wt

= 26.51/58.933 = 0.4498moles

no of moles of I = W/G.A.Wt

= 114.19/126.9 = 0.8998 moles

Co : I = 0.4498 : 0.8998

= 1:2

The empirical formula of metal iodide = CoI2

queen_honey_blossom answered 2 years ago

A 21.31 gram sample of cobalt is heated in the presence of excess fluorine. A metal...

A 21.31 gram sample of cobalt is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 41.93 g. Determine the empirical formula of the metal fluoride

a 15.04 gram sample of chromium is heated in the presence of excess iodine. a metal...

a 15.04 gram sample of chromium is heated in the presence of excess iodine. a metal iodide is formed with a mass of 125.2g. determine the empirical formula of the metal iodide

A 7.640 gram sample of iron is heated in the presence of excess iodine. A metal...

A 7.640 gram sample of iron is heated in the presence of excess iodine. A metal iodide is formed with a mass of 42.36 g. Determine the empirical formula of the metal iodide.

A 44.39 gram sample of iron is heated in the presence of excess oxygen. A metal...

A 44.39 gram sample of iron is heated in the presence of excess oxygen. A metal oxide is formed with a mass of 63.46 g. Determine the empirical formula of the metal oxide. Enter the elements in the order Fe, O empirical formula =

A 1.0 gram sample of an unknown metal was heated to 75 C, and then placed...

A 1.0 gram sample of an unknown metal was heated to 75 C, and then placed in a calorimeter filled with 100mL of water that had an initial temperature of 26 C. Once the system was allowed to reach thermal equilibrium the temperature of the water was 31 C. what is the specific heat capacity of the metal?

A 45.0-gram sample of copper metal was heated from 20.0 C to 100.0 C. Calculate the...

A 45.0-gram sample of copper metal was heated from 20.0 C to 100.0 C. Calculate the heat absorbed (in kJ) by the metal. If this 45.0-gram sample of copper is now placed in 150 grams of water at 20.0 C in a calorimeter, what will be the temperature of the water at thermal equilibrium? What gains heat? What loses heat? How much heat is exchanged (in kJ)? Specific heat of Copper .385 and a density of 8.92

A 0.831 gram sample of SO3 is placed in a 1.00 L rigid container and heated...

A 0.831 gram sample of SO3 is placed in a 1.00 L rigid container and heated to 1100 K. The SO3 decomposes to SO2 and O2 : 2SO3(g) ↔ 2SO2(g) + O2(g) At equilibrium, the total pressure in the container is 1.300 atm. Calculate the value of Kp at 1100 K Extra Credit: Consider two containers A and B where A is a rigid container and B is a container with a massless, frictionless piston that maintains constant pressure....

A sample of metal with a mass of 350 g is heated to 100 degrees celcius...

A sample of metal with a mass of 350 g is heated to 100 degrees celcius and dropped into 400 g of water at 21.4 degrees celcius. The temp of the water rises to 28.0 celcius. Assume no heat is lost to the environment. What is the amount of heat gained? What is the specific heat of the metal?

1. Can iodine be added before the primary stain in a Gram stain? Explain. If iodine...

1. Can iodine be added before the primary stain in a Gram stain? Explain. If iodine was added before the primary stain, what would be the final color of gram positive and gram negative cells in the stain and why? 2. Since you can’t identify bacteria from a Gram stain, why might a physician perform a Gram stain on a sample before prescribing an antibiotic? 3. The cell envelope of Mycobacterium sp. is unlike the envelope of other bacteria. While...

What is the purpose of the iodine in the Gram stain procedure? If this step was...

What is the purpose of the iodine in the Gram stain procedure? If this step was left out, what color would Gram negative and Gram positive cells appear after completion of the stain?

Question