Exams & Certification

“Find the gravitational force between the Sun and the Earth. Given Mass of the Sun = 1.99×10^30 kg Mass of the Earth = 5.98×10^24 kg The average distance between the Earth and the Sun = 1.5×10^11 m.” The Correct Answer and Explanation is: To find the gravitational force between the Sun and the Earth, we […]

The gravitational force of attraction between earth and the sun is 35.4710^21 N, Calculate the mass of the sun, given the mass of the earth is 5.9810^24 kg and the mean distance between the earth and the sun is 1.49610^11m given G=6.6710^-11 The Correct Answer and Explanation is: The gravitational force of attraction between two

The arrangement of keys on a keyboard, QWERTY reflects the keyboard layout by ? representing the phonetics of the alphabets most closely associated with the keyboard ? taking the letters of the first six alphabetic characters found on the top row of keys ? using the alphabetic characters most frequently used on the keyboard ?

Explain the effect of adding a catalyst on rate of reaction. The Correct Answer and Explanation is: A catalyst increases the rate of a chemical reaction without being consumed in the process. It does this by providing an alternative reaction pathway with a lower activation energy. Activation energy is the minimum energy required for reactants

Why does a catalyst increase the rate of a reaction? What is the difference between a homogeneous and heterogeneous catalyst? Would a given reaction have the same rate law for both a catalyzed and an uncatalyzed pathway? Explain fully. The Correct Answer and Explanation is: A catalyst increases the rate of a reaction by providing

What is the empirical formula of fructose (C6H12O6) found in honey? The Correct Answer and Explanation is: The empirical formula of fructose (C6H12O6) is CH2O. Explanation: The empirical formula represents the simplest whole-number ratio of the elements in a compound. To find the empirical formula for fructose, we first need to express the molecular formula

The carbohydrate fructose found in honey and fruits has an empirical formula ofCH2O. If the experimental molar mass of fructose is 180g, what is its molecular formula? The Correct Answer and Explanation is: The empirical formula of fructose is CH2OCH_2OCH2​O, which means that the ratio of carbon, hydrogen, and oxygen atoms in the simplest form

Fructose is A. a simple carbohydrate which follows empirical formula B. a complex carbohydrate which follows empirical formula C. a simple carbohydrate which does not follow empirical formula D. a complex carbohydrate which does not follows empirical formula The Correct Answer and Explanation is: The correct answer is A. a simple carbohydrate which follows the

The Correct Answer and Explanation is: Correct Answers: (a) astaxanthin: C₁₀H₁₃O(b) lutein: C₂₀H₂₈O(c) abscisic acid: C₁₅H₂₀O₄(d) capsanthin: C₄₀H₅₆O₃ Explanation The empirical formula of a compound represents the simplest whole-number ratio of atoms of each element present in the compound. The molecular formula, on the other hand, gives the actual number of atoms of each element

Climate and weather. ram below. VENN DIAGRAM WEATHER CLIMATE Both WORD BOX Predictable Unpredictable Average Climatology Meteorology Precipitation Temperature Rainfall Jumidity Wind Direction/Speed Clouds pressure Evaporation Daily Short ter ng term Seasons yearly observed over The Correct Answer and Explanation is: Here is the correct distribution of the words from the word box into the