Exams & Certification

Under the contribution approach to the income statement, the difference between sales and is contribution margin. manufacturing costs cost of goods sold all fixed expenses all variable expenses The Correct Answer and Explanation is : Correct Answer: All Variable Expenses Explanation: The contribution approach to the income statement is also known as the contribution margin […]

In 25 polcapitas contemptions of sofiat drinks in Country A was reported to be 18.26 gallons. Assume that per capita consumption of soft drinks in Country A is approximately normally distributed, with a mean of 18.26 gallons and a standard deviation of 4 gallons. What is the probibility that Someone in Country A consumed more

The density of acetonitrile (CH3CN) is 0.786 g/mL and the density of methanol (CH3OH) is 0.791 g/mL. A solution is made by dissolving 15.7 mL of CH3OH in 92.3 mL of CH3CN. What is the mole fraction of the methano in this solution? The Correct Answer and Explanation is The mole fraction of methanol in

The atmospheric pressure on the top of Mt Everest, an altitude of 29,035 ft, is only 259.9 mm Hg. What is the partial pressure of oxygen in the lungs at this altitude (assuming that the % O2 is the same as in dry air, 20.88%)? Report the pressure to the tenths of a mm Hg

The Correct Answer and Explanation is : 1. Mass Moment of Inertia of a Sphere The mass moment of inertia (I) of a solid sphere of mass ( M ) and radius ( R ) about an axis passing through its center is: [I = \frac{2}{5} M R^2] Derivation: For a hollow sphere, where mass

A precising definition reduces the vagueness of a word and defines a vague term more precisely. A word is vague if it allows for borderline cases in which it is difficult or impossible to tell whether the word applies. A precising definition helps to determine whether the applies to a specific situation or does not

1.The equation from the combustion of hexane is:C6H14(g)+19/2 O2(g) -(arrow sign) 6CO2(g)+7H2O(g)Calculate the number of moles ofa) CO2 produced in the combustion of 1.50 moles of hexaneb) H2O produced in the combustion of 0.25 moles of hexanec) O2 consumed in the combustion of 0.40 moles of hexane The Correct Answer and Explanation is : Solution:

The combustion of hexane (C6H14), a component of gasoline, is represented by the balanced chemical equation: 2 C6H14(I) + 19 O2(g) ® 12 CO2(g) + 14 H2O(g). If 1.0 mole of hexane undergoes combustion, moles of O2 are required.a. 19 molesb. 7 molesc. 9.5 molesd. 26 molese. 21 moles The Correct Answer and Explanation is

The short-run aggregate supply curve shows: O What happens to output in an economy when the government spends more money O The relationship between the price level and aggregate expenditure O How firms respond to changes in interest rates Changes in output in an economy as the price level changes, holding all other determinants of

comparing CH3Br (polar) and CH4(non-polar) electronegativity C-Br = 0.3 – no dipole moment C-H = 0.4 – no dipole moment how is CH3Br polar? do you add the dipoles facing thesame direction to get 1.5? The Correct Answer and Explanation is : Why is CH₃Br Polar While CH₄ is Non-Polar? Methyl bromide (CH₃Br) is polar,