Exams & Certification

Ms Shikongo, our mathematics teacher bought 40 calculators at N$ 8.20 each and a number of other calculators costing N$ 2.95 each. On all these items, she spent N$ 387.00. How many of the cheaper calculators did she buy? The Correct Answer and Explanation is : Let the number of the cheaper calculators be ( […]

Requirement 1. Prepare two income statements for the year, one using absorption costing and one using variable costing. Begin by preparing the income statement for the year using absorption costing. Quality Industries Income Statement (Absorption Costing) For the Year Ended Sales revenue 500,000 Less: Cost of goods sold 330,000 Gross profit $ 170,000 Less: Operating

Label the stages of mitosis. Labels Prophase Early interphase Late prophase Late interphase Metaphase Cytokinesis Telophase 2 ? @ E E M Drop Zones Telophase Cytokinesis Reset All Early interphase < prev=”” 22=”” of=”” 60=”” www=”” jud=”” late=”” interphase=”” next=”” prophase=”” late=””> The Correct Answer and Explanation is : Mitosis Stages: Explanation: Mitosis is the

Unlike eutherians, both monotremes and marsupials A) lack nipples B) have some embryonic development outside the uterus ) lay eggs are found in Australia and Africa 23) All animals, whether large or small, have ? A) an external body surface that is dry basic body plan that resembles a two-layered sac a body surface covered

Which of the following best describes the polarity for acetone? A. Acetone has polar bonds but is a nonpolar molecule. B. Acetone has nonpolar bonds and is also a nonpolar molecule. C. Acetone has polar bonds and is also a polar molecule. D. Acetone has nonpolar bonds but is a polar molecule. The Correct Answer

A geometric distribution has a pdf given by P(X=x) = p(1-p)^x, where x = 0, 1, 2, …, and 0 < p=””>< 1.=”” this=”” form=”” of=”” the=”” geometric=”” starts=”” at=”” x=”0,” not=”” at=”” x=”1.” given=”” are=”” the=”” following=””> E(X) = (1-p)/p, and Var(X) = (1-p)/p^2 A random sample of size n is drawn; the data

STOICHIOMETRY WORKSHEET 5 MASS-MOLES-ATOMS/MOLECULES 1. Fill in the tables (1 mole = 6.022 * 10%). Substance Mass Moles Atoms Silicon 0.456 lb Boron 8.2 mol Manganese ug 3.97 X 1024 Aluminum 0.0628 kg Carbon 8 5.9 mol Chlorine Іь 4.920 X 1022 Substance Mass Moles Molecules 5.928 Ammonium Carbonate Sulfuric Acid g 0.987 mol Sodium

Which Mass Wasting Process Has The Slowest Rate Of Movement? A Creep B Rockslide C Rock Avalanche D Slump The Correct Answer and Explanation is : The correct answer is A. Creep. Creep is the mass wasting process with the slowest rate of movement. It refers to the gradual downslope movement of soil and rock

Calculate the % yield for the reduction of Benzil using sodium borohydride (NaBH4) Show the balanced chemical equation for the reaction and how you determined the limiting reagent. Mass of benzil is 0.404 g. Mass of sodium borohydride is 0.0801 g. Mass of hydrobenzoin product is 0.239 g. Remember that boron donates 4 H-. The

1) mass of benzil moles x molar mass of benzil 0.35 mmol x 210.232 g/mol 73.5812 x 10^-3 g =73.58 mgmass of benzoin = 0.35 mmol x 212.24 g/mol 74.284 x 10^-3 g = 74.284 mg2)a) one mole of sodium borohydride (NaBH4) can reduce four moles of aldehyde or ketone therefore one mole of sodium