Exams & Certification

Write a formula for each of the following ionic compounds. copper(II) chloride Express your answer as a chemical formula.Write a formula for each of the following ionic compounds. copper(II) chloride Express your answer as a chemical formula. The Correct Answer and Explanation is : The chemical formula for copper(II) chloride is CuCl₂. Explanation: Thus, CuCl₂ […]

a. Write the formula for copper (II) phosphate b. Calculate the molecular weight for copper (II) phosphate c. Calculate the number of moles of copper (II) phosphate in 129.4 g of copper (II) phosphate. d. Calculate the total number of atoms of phosphorus in 129.4 g of copper (II) phosphate. The Correct Answer and Explanation

Empirical/Molecular Formula Practice Worksheet Directions: Find the empirical AND molecular formulas given the percent compositions or masses. SHOW YOUR WORK to receive full credit 1) 26,4% Carbon 3.3 % Hydrogen 70.3 % Oxygen Molar Mass: 91.0 g/mol Empirical Formula: Molecular Formula: 2) 81.8 grams Carbon 18.2 grams Hydrogen Molar Mass: 132,0 g/mol Empirical Formula: Molecular

Empirical/Molecular Formula Practice WorksheetDirections: Find the empirical AND molecular formulas given the percent compositions or masses. SHOW YOUR WORK to receive full credit.1)26.4% Carbon3.3% Hydrogen70.3% OxygenMolar Mass: 91.0 g/mol The Correct Answer and Explanation is : To determine the empirical and molecular formulas from the given percent compositions and molar mass, follow these steps: Step

Prove a) 1 + cos 72° + cos 144° cos 216″ cos 288° = 0 b) cos 36° cos 72° cos 108° cos 144°-0 Hint: Use the result of ex. 1d) The Correct Answer and Explanation is : Part a: Prove that [1 + \cos 72^\circ + \cos 144^\circ + \cos 216^\circ + \cos 288^\circ

From the IP address 192.168.10.1 and the subnet mask 255.255.255.192; Answer the Questions below: How many bits been borrowed from the last octet from the subnet mask? * Is this address 192.168.10.192, a network address? * How many sub networks it will be? *  Is this address 192.168.10.190, a broadcast address? * How many

Convert the angle measure 62◦ 33 to decimal degree form. The Correct Answer and Explanation is : To convert the angle 62° 33′ to decimal degree form, we follow a systematic method. This involves separating the degrees (°) from the minutes (‘) and converting the minutes into a fraction of a degree. Step-by-Step Process: Thus,

The management of Kunkel Company is considering the purchase of a $34,000 machine that would reduce operating costs by $9,000 per year. At the end of the machine’s five-year useful life, it will have zero scrap value. The company’s required rate of return is 12%. Click here to view Exhibit 11B-1 and Exhibit 11B-2, to

A solution of H2SO4with a molal concentration of 8.010 m has a density of 1.354 g/mL. What is the molar concentration of this solution?A solution of H2SO4with a molal concentration of 8.010 m has a density of 1.354 g/mL. What is the molar concentration of this solution?What is the molality of a 62.5 % by

Which of the following is the smallest carbohydrate? chitin cellulose sucrose O starch O glycogen The Correct Answer and Explanation is : The smallest carbohydrate among the options listed is sucrose. Explanation: Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen atoms. They can vary greatly in size, from simple sugars (monosaccharides) to