Chapter 2: Problem 97
Which of the following has a positive charge? A. proton B. neutron C. atom D. electron
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Chapter 2: Problem 97
Which of the following has a positive charge? A. proton B. neutron C. atom D. electron
These are the key concepts you need to understand to accurately answer the question.
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Iron ( \(\mathrm{Fe})\) can combine with oxygen \((\mathrm{O})\) to produce any one of the three different iron oxides: \(\mathrm{FeO}, \mathrm{Fe}_2 \mathrm{O}_3\), and \(\mathrm{Fe}_3 \mathrm{O}_4\). Of the three oxides, \(\mathrm{FeO}\) is the most unstable. If \(\mathrm{FeO}\) is exposed to air, it forms \(\mathrm{Fe}_2 \mathrm{O}_3\). Which equation correctly describes this reaction? A. \(\mathrm{FeO}+\mathrm{O}_2 \rightarrow \mathrm{Fe}_2 \mathrm{O}_3\) B. \(\mathrm{FeO}+\mathrm{O}_2 \rightarrow 2 \mathrm{Fe}_2 \mathrm{O}_3\) C. \(2 \mathrm{FeO}+\mathrm{O}_2 \rightarrow \mathrm{Fe}_2 \mathrm{O}_3\) D. \(4 \mathrm{FeO}+\mathrm{O}_2 \rightarrow 2 \mathrm{Fe}_2 \mathrm{O}_3\)
If a cyclist in the Tour de France travels southwest a total distance of \(12,250 \mathrm{~m}\) in 1 hour, what would the velocity of the cyclist be? A. \(3.80 \mathrm{~m} / \mathrm{s}\) southwest B. \(3.40 \mathrm{~m} / \mathrm{s}\) southwest C. \(3.40 \mathrm{~m} / \mathrm{s}\) northwest D. \(3.80 \mathrm{~m} / \mathrm{s}\) southeast
At room temperature, which of the following liquids has the highest density? A. orange juice B. milk C. honey D. water
A man does a push-up by applying a force, which results in \(0.50 \mathrm{~J}\) of work. If it takes 2 seconds to do the push-up, what is his power? A. \(0.50 \mathrm{~W}\) B. \(0.25 \mathrm{~W}\) C. \(1.25 \mathrm{~W}\) D. \(0.025 \mathrm{~W}\)
The following chemical equation takes place in the presence of specific heat. $$ \mathrm{CaCO}_3(\mathrm{~s}) \rightarrow \mathrm{CaO}(\mathrm{s})+\mathrm{CO}_2(\mathrm{~g}) $$ This reaction is an example of a A. redox reaction B. combination reaction C. decomposition reaction D. displacement reaction
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