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21 Mar 2018

132. Which answer is an example of the law of multiple proportions? Explain. a. Two different samples of water are found to have the same ratio of hydrogen to oxygen. b. When hydrogen and oxygen react, the mass of water formed is exactly equal to the mass of hydrogen and oxygen that reacted. c. The mass ratio of oxygen to hydrogen in water is 8:1. The mass ratio of oxygen to hydrogen in hydrogen peroxide (a compound that only contains hydrogen and oxygen) is 16:1.

Name: 132. Which answer is an example of the law of multiple proportions? Explain. a. Two different samples...
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Description: 132. Which answer is an example of the law of multiple proportions? Explain. a. Two different samples of water are found to have the same ratio of hydrogen to oxygen. b. When hydrogen and oxygen react, the mass of water formed is exactly equal to the mass ...

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mdasfaaruddinshareefLv10

24 Jun 2023

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24 Mar 2018

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Joey Tang

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19 May 2020

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Please answer the questions 13-16 marked as the âREPORT FOR EXPERIMENT 3â by reading the first 4 pictures if it helps.

EXPERIMENT 3 Preparation and Properties of Oxygen MATERIALS AND EQUIPMENT Solids: candles, magnesium (Mg) strips, dry yeast, fine steel wool (Fe), wood splints. Solution: 3 percent hydrogen peroxide (HOp), pneumatic trough, 20 to 25 em length rubber tubing, 25 X 200 mm ignition tube, five wide-mouth (gas-collecting) bottles, five glass cover plates. DISCUSSION Oxygen is the most abundant and widespread of all the elements in the earth's crust. It occurs both as free oxygen gas and combined in compounds with other elements. Free oxygen gas is diatomic and has the formula O2 Oxygen is found combined with more elements than any other single element, and it will combine with all the elements except some of the noble gases. Water is 88.9 percent oxygen by mass and the atmosphere is about 21 percent oxygen by vol- ume. Oxygen gas is colorless and odorless, and is only very slightly soluble in water, a prop- erty important to its collection in this experiment. Oxygen may be obtained by decomposing a variety of oxygen-containing compoun of these are mercury(ID oxide (HgO, mercuric oxide), leadIV) oxide (PbO2, lead dioxide), potas- sium chlorate (KCIO,), potassium nitrate (KNO,), hydrogen peroxide (H02), and water (H,O). In this experiment oxygen is produced by decomposing hydrogen peroxide, and five bottles of oxygen will be collected by the downward displacement of water. After collection, some the physical and chemical properties of oxygen will be observed. A. Decomposition of Hydrogen Peroxide to Generate Oxygen Hydrogen peroxide decomposes very slowly at room temperature. The rate of decomposition is greatly increased by adding a catalyst, manganese dioxide. Although manganese dioxide contains oxygen, it is not decomposed under conditions of this experiment. These equations represent the changes that occur Word Equation: Hydrogen peroxide Water + Oxygen Formula Equation: 2H,0,la)H,oN)+ 0g) B. Collection of Oxygen The oxygen is collected by a method known as the downward displacement of water. The gas is conducted from a generator to a bottle of water inverted in a pneumatic trough

CAN SOMEONE SHOW ME HOW TO DO THESE PROBLEMS?

A sample of H2SO4 contains 2.02 g of hydrogen, 32.07 g of sulfur, and 64.00 g of oxygen. How many grams of sulfur and grams of oxygen are present in a second sample of H2SO4 containing 8.78 g of hydrogen?

Mass of Sulfer = ____ g

Mass of Oxygen = _____ g

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Compund I: _____

3. In a combustion reaction, 49.0 g of hydrocarbon reacts with 96.0 g of oxygen to produce water and carbon dioxide. If 57.7 g of water is produced, how much carbon dioxide is produced?

Mass= ______g

Consider a gaseous binary compound with a molar mass of 62.09 g/mol. When 1.39g of this compound is completely burned in excess oxygen, 1.21 g of water is formed. Determine the formula of the compound. Assume water is the only product that contains hydrogen.