deadrain5087 deadrain5087

25-10-2022
Chemistry

Answered

a 5.000 g sample of a compound containing only potassium, rhenium and chlorine was analyzed and found to contain 0.530 g of potassium and 1.935 g of chlorine. if the formula mass (molar mass) of the compound is approximately 734 g/mol, what is its chemical formula? write your answer as kxreyclz, where x, y, and z are whole numbers, but not subscripted.

Answer :

QWTiffany QWTiffany

06-11-2022

The chemical formula based on mentioned information is K1Cl6Re1.

Firstly calculating the mass of Rhenium. Using law of conservation of mass for the calculation.

Total mass = sum of individual mass of chlorine, potassium and Rhenium

Mass of Rhenium = 5 - (0.530 + 1.935)

Mass of Rhenium = 2.535 grams

Now calculating the number of moles of each atom. Number of moles will be calculated by division and the formula is -

Number of moles = mass ÷ molar mass

Number of moles of Potassium = 0.5÷39

Number of moles of Potassium = 0.01

Number of moles of Chlorine = 1.935 ÷ 35

Number of moles of Chlorine = 0.06

Number of moles of Rhenium = 2.535 ÷ 186

Number of moles of Rhenium = 0.01

So, predicting the chemical formula -

K : Cl : Re = 0.01 : 0.06 : 0.01

Multiplying all the three ratio with 100

K : Cl : Re = 1 : 6 : 1

So, the chemical formula is K1Cl6Re1.

Learn more about chemical formula -

https://brainly.com/question/11681864

#SPJ4

Answer Link

Other Questions

A teacher has given a lab student a white chemical sample and asks her to confirm that it contains 7. 03 x 1023 formula units of sodium hydroxide(NaOH). Using t

PLEASE HELP!!!!!! The rate of effusion of unknown gas X is found to be about 2. 5 times that of SF6 gas (MW = 146 g/mol) at the same conditions of temperature a

A solution of potassium hydroxide (KOH) was titrated against a solution of hydrochloric acid. It took 35cm3 of the hydrochloric acid to completely neutralise th

A chemist is studying the rate of the Haber synthesis: N2 + 3H2 2NH3 Starting with a closed reactor containing 1. 25 mol/L of N2 and 0. 50 mol/L of H2, the chem

Enter the appropriate symbol for an isotope of potassium-39 corresponding to the isotope notation AZXZAX. Express your answer as a chemical symbol using isotope

This is how fluorine appears in the periodic table. Which is one piece of information that "9" gives about an atom of fluorine? The atomic mass is different th

If the actual yield of sodium chloride from the reaction of 8. 3g of sodium and 4. 5g of chlorine is 6. 4g, what is the percent yield? 2Na(s) + Cl2(g)-->2NaC

Draw the major organic product of the reaction of aniline with excess methyl iodide. Include any lone pairs of electrons and nonzero formal charges. Draw only o

Calculate the mass of sodium carbonate needed to make 1. 0 g of sodium chloride How would I solve this and what would the answer be??

A chemist determines that 1. 26 g of iron reacts with 0. 54 g of oxygen to form rust. What is the percent composition of each element in the new compound?