Exams & Certification
Calculate the % v/v of a glycerol-water mixture prepared by adding 100 g of glycerol (specific gravity 1.263) to 1 liter of water. (ONE DECIMAL PLACE) The correct answer and explanation is: To calculate the % v/v (volume/volume percent) of a glycerol-water mixture, we need to find the volume of glycerol and the total volume […]
How many asymmetric centers are present in the compound shown below? 2 4 3 1 The Correct Answer and Explanation is: The correct answer is 3. An asymmetric center, or a chiral center, is a carbon atom that is bonded to four different groups. To determine the number of asymmetric centers in the provided molecule, we
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How many asymmetric centers are present in the compound below? (CH3NH2) OH CH3CH=CH2 The Correct Answer and Explanation is: The compound you’ve provided is CH3NH2 (methylamine) OH (hydroxyl group) CH3CH=CH2 (propene). Let’s break this down: Conclusion: There are no asymmetric (chiral) centers in this compound. A chiral center is a carbon atom that is attached
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what is 0.16, 6 repeating as a fraction? The Correct Answer and Explanation is: To convert the decimal 0.16 repeating (written as 0.166666… where the 6 repeats) into a fraction, we can follow a step-by-step process. Step 1: Set up an equation Let x=0.166666… x = 0.166666…x=0.166666…, where the 6 repeats indefinitely. Now, multiply both
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Russ and David have a dump truck full of mulch to spread in the yard. By lunchtime, Russ has spread 3/5 mulch, and David has spread 1/3 mulch. How much more mulch do the boys have to spread? The Correct Answer and Explanation is: To find how much more mulch Russ and David need to
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Which algebraic expression is a polynomial with a degree of 2? 4x³ – 2x 10x² – ?x 8x³ + \frac{5}{x} + 3 6x² – 6x + 5 The Correct Answer and Explanation is: The correct answer is 6x² – 6x + 5. To determine the correct answer, we must first understand the two conditions given in
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Velocity refers to the rate of change in displacement. True or false. The Correct Answer and Explanation is: True. Velocity refers to the rate at which an object’s displacement changes over time. It is a vector quantity, meaning it has both magnitude (speed) and direction. Displacement itself is defined as the change in position of
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Why do you think is CCl2O much less polar than CH2O The Correct Answer and Explanation is: CCl2O (carbonyl dichloride) is much less polar than CH2O (formaldehyde) due to the difference in electronegativity of the atoms involved and the molecular geometry of the two compounds. In CH2O, the central carbon atom is double-bonded to an
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Draw the Lewis structure for the CH2O molecule: Based on this structure_ the number of polar bonds and non-polar bonds is 01) 3 polar bonds and no non-polar bonds 2) 2 polar bonds and non ~polar bond polar bonds and 2 non-polar bonds no polar bonds and 3 non-polar bonds 2 polar bonds and 2
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Find the molecular mass of sulphuric acid The Correct Answer and Explanation is: The molecular mass of sulfuric acid (H₂SO₄) can be calculated by adding the atomic masses of all the atoms in the molecule. Step-by-step calculation: Adding them all together: Therefore, the molecular mass of sulfuric acid (H₂SO₄) is 98 g/mol. Explanation: The molecular
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