Exams & Certification

identify the following elements as metal, nonmetal, or metalloid a. copper b. sulfur c. sodium 3. How many protons, neutrons and electrons are in the following isotope: The Correct Answer and Explanation is : Let’s break this down step by step. Part 1: Identifying Elements as Metal, Nonmetal, or Metalloid a) Copper (Cu): Copper is […]

The average annual snowfall for Boise, ID, is 19.8 inches. Anchorage, AK, receives an average of 74.5 inches. Fill in the blanks:  Â (a) Anchorage receives, on average, % more snow than Boise. Round to the nearest percent. The Correct Answer and Explanation is : To calculate the percentage of snow Anchorage receives more

A solid sample containing some Fe2+ ion weighs 1.026 g. It requires 26.54 mL of 0.01486 M KMnO4 to titrate the Fe2+ in the dissolved sample to the pink endpoint. How many moles of MnO4 are required? 9.860 x 10-5 moles 0.01486 moles 1.635 x 10-6 moles 3.944 x 10-1 moles 3.944 x 10-4 moles

Complete the table below for calculating the molar mass of the ionic compound iron(II) iodide. Number of ions Mass of ion in one mole of iron(II) iodide Formula Molar mass of ion Fe2+ g/mol x Cation mol Anion T g/mol X mol Molar mass iron(II) iodide g/mol Complete the table below for calculating the molar

Which of the following is true of divorce or remarriage in older adults? 1.Divorce is far less common among younger adults than older adults. 2.Rising divorce rates, increased longevity, and better health have led to an increase in remarriage among older adults. 3.Women are more likely than men to remarry, thus removing themselves from the

The proper quantity of safety stock is typically determined by Group of answer choices minimizing an expected stockout cost setting the level of safety stock so that a given stockout risk is not exceeded carrying sufficient safety stock so as to eliminate all stockouts meeting 95% ?of all demands minimizing total costs The Correct Answer

Ca(OH)2 +H2SO4 —> CaSO4 +2H2O What is the net ionic equation ?with steps The Correct Answer and Explanation is : To determine the net ionic equation for the reaction: [ \text{Ca(OH)}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{CaSO}_4 + 2\text{H}_2\text{O} ] we need to break down the reaction into its ionic components and eliminate the spectator ions. Let’s

Which of the following best describes Snap layouts?A. Prearranged settings for how open windows displayB. Adds files to the computerC. Contains shortcuts to the most frequently used foldersD. Used to switch between open desktops The Correct Answer and Explanation is : The correct answer is A. Prearranged settings for how open windows display. Explanation: Snap

Which of the following best describes Snap layouts? Prearranged settings for how open windows display Adds files to the computer Contains shortcuts to the most frequently used folders Used to switch between open desktops The Correct Answer and Explanation is : The correct answer is “Prearranged settings for how open windows display.” Explanation: Snap Layouts

The acceleration due to gravity at sea level is g = 9.81 m/s2. The radius of the earth is 6370 km. The universal gravitation constant is G = 6.67 × 10−11 N-m2/kg2. Use this information to determine the mass of the earth. A person weighs 180 lb at sea level. The radius of the earth