None QUESTION 19A sample of lake water at 25°C has a hardness of 25 mg/L and [Mg2+] 1.0×104 M. Which of the following statements is true?OA Hardness index of the lake water is 25 mg CaCO3/LOB. Hardness index of the lake water is 0.25 M.OC Hardness index of the lake water is 25 MDD. Hardness index of the lake water is 2.5 M

To determine which statement is true, we first need to understand what water hardness is and how it…

Answered: QUESTION 19 A sample of lake water at…

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Physics And Measurement

Section: Chapter Questions

Problem 15P: One gallon of paint (volume = 3.78 103 m3) covers an area of 25.0 m2. What is the thickness of the...

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1. What is the density of water at room temperature? A. 1000 g/ml C. 1000 g/cc 2. What is the specific gravity of aluminum if its density is Pal = 2 700 kg/m³? A. 2.7 x 10-12 C. 2.7 x 1012 3. What is the specific gravity of gold if its density is Pau 19 300 kg/m³? A. 19.3 x 10-12 С. 19.3 х 1012 3. How much volume does a 200 kg of water(H20) occupies? А. 0.200 m3 C. 0.002 m³ 4. A cube with a weight of 50 kg is sitting above the table. If the cube has a side length of 2m, how much pressure does the cube exert on the table? B. 1 kg/m³ D. 1 g/cc В. 2.7 х 106 D. 2.7 В. 19.3 х 106 D. 19.3 В. 0.020 m3 D. 2.000 m³ В. 25 Ра С. 245 Ра А. 12.5 Ра С. 122.5 Ра 5. Crawling in a frozen lake decreases the chance of breaking the ice rather than walking on it. Which of the following explains the reason behind? A. More body heat is transferred to the ice when crawling B. The body is heavier when walking than crawling C. Crawling put lesser pressure on the ice rather than walking D. Walking put lesser…

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