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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Is pure 24-carat gold a substance, element, and/or compound? Explain.
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- Choose the pure substance from the list below. O tea O a casserole O mercury sugar water O pomegranate juicearrow_forwardA pure substance is: O composed of two or more regions with different compositions. O composed of two or more different types of atoms or molecules combined in variable proportions. composed of only one type of atom or molecule. O composed of two or more different types of atoms or molecules that has constant composition. Onone of the abovearrow_forwardmost of the materials around us are composed of mixtures of pure substances. What do you call a combination of two or more pure substances in which each pure substance retains its characteristic properties?arrow_forward
- Write a balanced chemical equation for each of the following. Express your answer as a chemical equation. Identify all of the phases in your answer. Gaseous butane (C4H10) reacts with oxygen gas to form carbon dioxide gas and water vapor. Liquid methanol (CH3OH) reacts with oxygen gas to form carbon dioxide gas and water vapor.arrow_forwardComplete the following statements. The provided aqueous KI/I2 was a: pure compound, heterogenous mixture, pure element, or a homogenous mixture The provided Na2S2O3 was a: heterogenous mixture, pure compound, pure element, homogenous mixturearrow_forwardMolecules can be described as O heterogeneous mixtures. O homogeneous mixtures. two or more atoms chemically joined together. mixtures of two or more pure substances. h mixtures of two or more elements that have a specific ratio between components. Attemp 1 Ho 24/7 Po aarrow_forward
- Fact, Law, Hypothesis, or Theory? __ An object less dense than the air flies up on its own. __ Atoms make and break chemical bonds by transferring or sharing their valence electrons to satisfy the octet rule. __ A firework is seen to burn with a green flame.arrow_forwardChalcopyrite is among the most common varieties of copper ore. Assuming chalcopyrite is 34.4% copper by mass (34.4 grams copper per 100. grams of ore), how many kilograms of chalcopyrite would be needed to smelt 30.0 kilograms of pure copper?arrow_forwardHow can you distinguish an element, from a compound, from a solution, from a heterogeneous mixture? Explainarrow_forward
- 4. What is the difference between a mixture and a pure substance?arrow_forwardComplete the table below. | mg 2 g %D d dm 8 m %3D g. 8 ks 300 cLarrow_forwardHere are four sketches of pure substances. Each sketch is drawn as if a sample of the substance were under a microscope so powerful that individual atoms could be seen. Decide whether each sketch shows a pure sample of an element or a pure sample of a compound. Substance A element O compound Substance C O element O compound Substance B O element O compound Substance D O element O compoundarrow_forward
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