Question

Problem Solving Show all your calculation steps and round up your answers to the nearest significant figures where applicable. (A sample of 3.86g of nickel metal (Ni) reacts with bromine vapor to form 14.42g of a yellow solid product. What is the empirical formula of the product? (Ni: 58.69 g/mol; Br: 79.90 g/mol) 114 points) The compound TeyCl, was prepared by the reaction of tellurium with chlorine gas in the following reaction: 3Te + Cl2 - TeCl2 Suppose you react 8.96g of Te with chlorine gas. How many grams of Te3Cl2 do you expect to get? (Te: 127.60 g/mol; CI: 35.45 g/mol) (14 points)

Answer 1

Anster The solid Product contains Ni and Br. All the nickel reacted remain present in product. So, amount of or in Product (14.42-3-86) g = 10.56g ma 88 Number of moles = molas mass 3.86 58.69 mol of Ni So, 3.86 g of Ni = 0.0658 mol of Ni 10.56g of Br 10.56 6) F 8ช 79.96 = 0.1322 mol of Br Mol of Ni u Mol of Br = 0.0658 : 0.1322 1: 0.1322 0.0658 1:2 2 so, empirical formula of product is Nibra