Exams & Certification
The Correct Answer and Explanation is: The correct answer to the problem is 1.16 × 10⁻¹⁸ g. To determine the mass of 2.50 × 10⁴ molecules of nitrogen gas, we use the molar mass of nitrogen gas and Avogadro’s number. The molar mass of nitrogen gas (N₂) is approximately 28.02 g/mol, and Avogadro’s number is […]
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Fill in the blanks by using the correct term/words. 1. _ Enzyme that unwinds DNA 2. Fragments of copied DNA created on the lagging strand 3. The strand that is copied in a continuous way, from the 3′ to 5′ direction 4. Binds Okazaki fragments 5. Builds a new DNA strand by adding complementary bases
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Write the net ionic equation for the reaction that takes place between aqueous magnesium chloride and aqueous sodium hydroxide: MgCl2(aq) + 2NaOH(aq) → Mg(OH)2(s) + 2NaCl(aq) The Correct Answer and Explanation is: Net Ionic Equation: Mg2+(aq)+2OH−(aq)→Mg(OH)2(s)\text{Mg}^{2+}(aq) + 2\text{OH}^-(aq) \rightarrow \text{Mg(OH)}_2(s)Mg2+(aq)+2OH−(aq)→Mg(OH)2(s) Explanation: To write the net ionic equation, we start by understanding what occurs in the
Sin 12 degree sin 18 degree sin 54 degree The Correct Answer and Explanation is: To evaluate the expression:sin(12∘)⋅sin(18∘)⋅sin(54∘)\sin(12^\circ) \cdot \sin(18^\circ) \cdot \sin(54^\circ)sin(12∘)⋅sin(18∘)⋅sin(54∘) we can make use of known trigonometric identities and exact values for special angles. Step-by-step calculation: Start by using known sine values for 18° and 54°: Multiplying these two:sin(18∘)⋅sin(54∘)=(5−14)⋅(5+14)\sin(18^\circ) \cdot \sin(54^\circ) =
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What type of biological molecules is ATP? nucleic acid carbohydrate protein lipid The Correct Answer and Explanation is: ATP, or adenosine triphosphate, is classified as a nucleic acid. More specifically, it is a nucleotide, which serves as a fundamental unit for nucleic acids such as DNA and RNA. ATP consists of three essential components: adenine,
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Three possible causes of high suction pressure are low superheat, overcharge, dirty evaporator. 18. A likely indication of non-condensables in a refrigeration system is lower than normal head pressure. 19. Bad compressor valves are usually indicated by low suction pressure and low head pressure. 20. Allowing head pressures to go too low will cause the
Write the singular form of each of the following words: pleurae, gyri, ganglia, fissures. Write the plural form of each ofthe following: villus, tibia, encephalitis, cervix, stoma. The Correct Answer and Explanation is: Correct Answers: Singular Forms: Plural Forms: Explanation: Medical and anatomical terminology often originates from Latin or Greek. Understanding singular and plural forms
NaNO3 soluble or non soluble The Correct Answer and Explanation is: Correct Answer: Soluble Sodium nitrate (NaNO₃) is soluble in water. This solubility is due to the nature of both the sodium ion (Na⁺) and the nitrate ion (NO₃⁻), which are known for forming compounds that easily dissolve in water. To understand why NaNO₃ is
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Why shouldn’t classes overlap when summarizing continuous data in a frequency or relative frequency distribution? Choose the correct answer below: A. Classes shouldn’t overlap so that the class width is as small as possible. B. Classes shouldn’t overlap so that they are open-ended. C. Classes shouldn’t overlap so there is no confusion as to which
Why shouldn’t classes overlap when summarizing continuous data in a frequency or relative frequency distribution? The Correct Answer and Explanation is: Correct Answer:Classes should not overlap when summarizing continuous data in a frequency or relative frequency distribution to avoid confusion and ensure that each data value is counted in one and only one class. Explanation: