Chapter 7 Review Chemical Formulas.Docx - Name:_Class: _Date: _ Chapter 7 Review Chemical Formulas And Chemical Compounds Section 1 Short Answer Answer | Course Hero: Why The Past 10 Years Of American Life Have Been Uniquely Stupid

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Tools to quickly make forms, slideshows, or page layouts. Well this is maybe one of the most fundamental chemical reactions. To determine its composition, a sample is burned in excess oxygen, producing the following results: 1. So we could say some energy, and I'm being inexact right over here. Let me write that down. How many molecules are present in that 3.

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Well we have molecular hydrogen and we have molecular oxygen. C. Does the oxidation number of carbon change upon the formation of CO₂? And so in an actual, in an actual environment, in an actual system, it's constantly going back and forth between these two things. Symbols such as logos offices cars titles type of language or terminology. Voiceover] Let's talk a little bit about chemical reactions. NaOHWhat is the formula mass of sodium hydroxide? Chapter 7 review chemical formulas and chemical compounds with unusual. 6hydrogen in H₂O₂+1hydrogen in MgH₂-1sulfur in S₈0carbon in (CO₃)²⁻+4chromium in Na₂Cr₂O₇+6nitrogen in NO₂+4Following are samples of four different compounds.

And that's why energy's an important thing here. This "green" reaction releases massive amounts of energy along with super heated water (steam). So, you know, this reaction, strongly goes in this, in the direction of going to water. Chapter 7 review chemical formulas and chemical compounds examples. Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e. g., in search results, to enrich docs, and more. Others, like with heating or cooling water, are simply physical phase changes. Both of these are charged.

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If you react H2 and O2 you form water (H2O), that is what happens in reality, so the chemical equation must show that. It is already oxidized and can't burn any further without first breaking down the molecule back into hydrogen and oxygen. Course Hero member to access this document. All that fast-moving steam creates the thrust that propels the rocket from Earth. 50 mol sample of this compound? CHAPTER 7 REVIEW chemical formulas.docx - Name:_Class: _Date: _ CHAPTER 7 REVIEW Chemical Formulas and Chemical Compounds SECTION 1 SHORT ANSWER Answer | Course Hero. C. C₂H₅Naphthalene is a soft covalent solid that is often used in mothballs. Carbonic acid is actually an incredibly important molecule, or we could call it a compound because it's made up of two or, two or more elements, in living systems and in fact, you know, even in the environment. So let me make this clear. Phone:||860-486-0654|. So this makes this an ion, and actually right over here, this is a hydrogen, this is a hydrogen ion right over here. Instructions to Create a Strong Promotion Strategy for Your Clothing.

And even when you go out to get some fast food. This big tank contains a bunch of liquid oxygen and hydrogen. For every, for this reaction to happen, you actually have two molecules of molecular hydrogen. The more reactants you put in, the more chance they're going to bounce around and be able to react with each other. Carbonic acid is incredibly important in how your body deals with excess carbon dioxide in its bloodstream. Chapter 7 review chemical formulas and chemical compounds crossword. Q25 The organ in the form of a sac on the underside of the liver that stores. And so what are the reactants here? Well, they're any time that you have bonds being formed or broken between atoms or molecules. Assign the oxidation number to each atom in MgCO₃.

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I now have one, two, three, four hydrogens, just like that. Now let's talk about the idea. To make this reaction go the other way, you would have to do something called electrolysis, you provide energy, etcetera, etcetera. When you have carbonated drinks, it has carbonic acid in it that disassociates into carbon dioxide and that carbon dioxide is what you see bubbling up. Are they put separately? And this molecular oxygen, of course it's a molecule, but you would not call it a compound either. 1 Posted on July 28, 2022. 18 g/mol and it contains 93. Now why did I say molecular hydrogen? And to create this incredible amount of energy, it actually just... Chapter 7 Review : Chemical Formulas and Chemical Compounds (Mixed Review) Flashcards. You mix the two together with a little bit of energy and then you produce a ton of energy that makes the rocket, that makes the space shuttle. To have enough to power a large combustion reaction would require an incredibly large tank to hold it – the opposite of what's needed for an aerodynamically designed launch vehicle.

To get around this problem, turn the hydrogen gas into a liquid, which is denser than a gas. Hydrogen is generally referring to H, whether it's in H2O, NaHCO3, or just the element in general. It just really means that it's very unlikely to go the other way. Determine the molecular formula of naphthalene from this information. 25 mol of sodium hydroxide? C. Determine the number of moles of nitrogen present in the combustion products. So this is a molecule or compound, while this molecular hydrogen, you would not call this a compound. If you provide more of the products over here, then you're gonna go in that direction. B. Mg is +2, C is +4, and O is -2. c. No. Calculate the molar mass of nicotine to the nearest gram. Without chemical reactions, we would have no life, we would not even have the universe as we know it.

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Let me know if this helps. D. Determine the empirical formula of nicotine based on your calculations. 6. regimes of address and inclusionexclusion The question might therefore not be. So we have an arrow that moves us to the product, or we could say the products. And the word ion, that's just used to describe any molecule or atom that has either, has an imbalance of electrons or protons that cause it to have a net charge. When the propellant is ignited, the hydrogen reacts explosively with oxygen to form: water! Nonetheless, this is not a practical way of solving the droughts that affect many countries around the world.

Water is basically the ash of hydrogen. In the beginning of the video with the example of the water reaction, why doesn't Sal write 2H202 instead of 2H20? And look, I did not create or destroy any atoms. So much so that it's actually used for rocket fuel. You have to supply a lot of energy to go the other way.

If you actually provide more reactants, you're gonna go more in that direction. 5:19if there is a tank filled with oxygen and hydrogen how come it doesn't just turn into water? It looks all neat and organized but in a real system, these are all of these things just bouncing around in all different crazy ways. So what are chemical reactions. If its empirical formula is CH₂O, what is its molecular formula?

E. In a separate experiment, the molar mass of nicotine is found to be somewhere between 150 and 180 g/mol. This means cooling the hydrogen to a temperature of ‑423 degrees Fahrenheit (‑253 degrees Celsius). You see it right over here, one, two hydrogen atoms. These are the molecules that are going to react. Question 2 Correct 400 points out of 400 Question 3 Correct 400 points out of. Is this possible: H2 + O = H2O. 2 Posted on August 12, 2021. And just to get an appreciation of how much energy this produces, let me just show you this picture right over here.

But Babel is not a story about tribalism; it's a story about the fragmentation of everything. This new game encouraged dishonesty and mob dynamics: Users were guided not just by their true preferences but by their past experiences of reward and punishment, and their prediction of how others would react to each new action. Means of making untraceable social media posts crossword october. Research shows that antisocial behavior becomes more common online when people feel that their identity is unknown and untraceable. By 2013, social media had become a new game, with dynamics unlike those in 2008. To see how, we must understand how social media changed over time—and especially in the several years following 2009.

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We see this trend in biological evolution, in the series of "major transitions" through which multicellular organisms first appeared and then developed new symbiotic relationships. "Pizzagate, " QAnon, the belief that vaccines contain microchips, the conviction that Donald Trump won reelection—it's hard to imagine any of these ideas or belief systems reaching the levels that they have without Facebook and Twitter. We now have a Republican Party that describes a violent assault on the U. Capitol as "legitimate political discourse, " supported—or at least not contradicted—by an array of right-wing think tanks and media organizations. It's about the shattering of all that had seemed solid, the scattering of people who had been a community. The most recent Edelman Trust Barometer (an international measure of citizens' trust in government, business, media, and nongovernmental organizations) showed stable and competent autocracies (China and the United Arab Emirates) at the top of the list, while contentious democracies such as the United States, the United Kingdom, Spain, and South Korea scored near the bottom (albeit above Russia). Thank you for supporting The Atlantic. Means of making untraceable social media posts crossword solver. In a post-Babel democracy, not much may be possible. We see it in cultural evolution too, as Robert Wright explained in his 1999 book, Nonzero: The Logic of Human Destiny. It is unconcerned with individual rights. As he watched Twitter mobs forming through the use of the new tool, he thought to himself, "We might have just handed a 4-year-old a loaded weapon.

But social media made it cheap and easy for Russia's Internet Research Agency to invent fake events or distort real ones to stoke rage on both the left and the right, often over race. I think we can date the fall of the tower to the years between 2011 (Gurri's focal year of "nihilistic" protests) and 2015, a year marked by the "great awokening" on the left and the ascendancy of Donald Trump on the right. We are disoriented, unable to speak the same language or recognize the same truth. But by rewiring everything in a headlong rush for growth—with a naive conception of human psychology, little understanding of the intricacy of institutions, and no concern for external costs imposed on society—Facebook, Twitter, YouTube, and a few other large platforms unwittingly dissolved the mortar of trust, belief in institutions, and shared stories that had held a large and diverse secular democracy together. As these conditions have risen and as the lessons on nuanced social behavior learned through free play have been delayed, tolerance for diverse viewpoints and the ability to work out disputes have diminished among many young people. Across eight studies, Bor and Petersen found that being online did not make most people more aggressive or hostile; rather, it allowed a small number of aggressive people to attack a much larger set of victims. Structural Stupidity. A second way to harden democratic institutions is to reduce the power of either political party to game the system in its favor, for example by drawing its preferred electoral districts or selecting the officials who will supervise elections. Means of making untraceable social media posts crossword puzzle. Every state should follow the lead of Utah, Oklahoma, and Texas and pass a version of the Free-Range Parenting Law that helps assure parents that they will not be investigated for neglect if their 8- or 9-year-old children are spotted playing in a park. It is also the view of the "traditional liberals" in the "Hidden Tribes" study (11 percent of the population), who have strong humanitarian values, are older than average, and are largely the people leading America's cultural and intellectual institutions. Only within the devoted conservatives' narratives do Donald Trump's speeches make sense, from his campaign's ominous opening diatribe about Mexican "rapists" to his warning on January 6, 2021: "If you don't fight like hell, you're not going to have a country anymore. In the 20th century, America's shared identity as the country leading the fight to make the world safe for democracy was a strong force that helped keep the culture and the polity together. It's mostly people yelling at each other and living in bubbles of one sort or another.

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Childhood has become more tightly circumscribed in recent generations––with less opportunity for free, unstructured play; less unsupervised time outside; more time online. Research on procedural justice shows that when people perceive that a process is fair, they are more likely to accept the legitimacy of a decision that goes against their interests. What's more, they are the two groups that show the greatest homogeneity in their moral and political attitudes. Stop starving children of the experiences they most need to become good citizens: free play in mixed-age groups of children with minimal adult supervision. It has not worked out as he expected. Recent academic studies suggest that social media is indeed corrosive to trust in governments, news media, and people and institutions in general. It would also likely reduce the frequency of death threats, rape threats, racist nastiness, and trolling more generally. In the Democratic Party, the struggle between the progressive wing and the more moderate factions is open and ongoing, and often the moderates win. The one furthest to the right, known as the "devoted conservatives, " comprised 6 percent of the U. population.

Depression makes people less likely to want to engage with new people, ideas, and experiences. You can see the stupefaction process most clearly when a person on the left merely points to research that questions or contradicts a favored belief among progressive activists. Political polarization is likely to increase for the foreseeable future. The newly tweaked platforms were almost perfectly designed to bring out our most moralistic and least reflective selves. Reforms should limit the platforms' amplification of the aggressive fringes while giving more voice to what More in Common calls "the exhausted majority. Even before the advent of social media, search engines were supercharging confirmation bias, making it far easier for people to find evidence for absurd beliefs and conspiracy theories, such as that the Earth is flat and that the U. government staged the 9/11 attacks. Newspapers full of lies evolved into professional journalistic enterprises, with norms that required seeking out multiple sides of a story, followed by editorial review, followed by fact-checking. The cause is not known, but the timing points to social media as a substantial contributor—the surge began just as the large majority of American teens became daily users of the major platforms. We are cut off from one another and from the past. We must harden democratic institutions so that they can withstand chronic anger and mistrust, reform social media so that it becomes less socially corrosive, and better prepare the next generation for democratic citizenship in this new age.

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An autocracy can deploy propaganda or use fear to motivate the behaviors it desires, but a democracy depends on widely internalized acceptance of the legitimacy of rules, norms, and institutions. In his book The Constitution of Knowledge, Jonathan Rauch describes the historical breakthrough in which Western societies developed an "epistemic operating system"—that is, a set of institutions for generating knowledge from the interactions of biased and cognitively flawed individuals. More generally, to prepare the members of the next generation for post-Babel democracy, perhaps the most important thing we can do is let them out to play. Because rates of teen depression and anxiety have continued to rise into the 2020s, we should expect these views to continue in the generations to follow, and indeed to become more severe. The "Hidden Tribes" study, by the pro-democracy group More in Common, surveyed 8, 000 Americans in 2017 and 2018 and identified seven groups that shared beliefs and behaviors. In a comment to Vox that recalls the first post-Babel diaspora, he said: The digital revolution has shattered that mirror, and now the public inhabits those broken pieces of glass. They built a tower "with its top in the heavens" to "make a name" for themselves. These two extreme groups are similar in surprising ways.

Yet when we look away from our dysfunctional federal government, disconnect from social media, and talk with our neighbors directly, things seem more hopeful. One result is that young people educated in the post-Babel era are less likely to arrive at a coherent story of who we are as a people, and less likely to share any such story with those who attended different schools or who were educated in a different decade. Come, let us go down, and confuse their language there, so that they will not understand one another's speech. The mid-20th century was a time of unusually low polarization in Congress, which began reverting back to historical levels in the 1970s and '80s. The tech companies that enhanced virality from 2009 to 2012 brought us deep into Madison's nightmare. It just means that before a platform spreads your words to millions of people, it has an obligation to verify (perhaps through a third party or nonprofit) that you are a real human being, in a particular country, and are old enough to be using the platform. It's not just the waste of time and scarce attention that matters; it's the continual chipping-away of trust.

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Before the 2019 protests in Hong Kong, China had mostly focused on domestic platforms such as WeChat. The age should be raised to at least 16, and companies should be held responsible for enforcing it. Gurri is no fan of elites or of centralized authority, but he notes a constructive feature of the pre-digital era: a single "mass audience, " all consuming the same content, as if they were all looking into the same gigantic mirror at the reflection of their own society. Most Americans in the More in Common report are members of the "exhausted majority, " which is tired of the fighting and is willing to listen to the other side and compromise. Even so, from 2009 to 2012, Facebook and Twitter passed out roughly 1 billion dart guns globally. American factions won't be the only ones using AI and social media to generate attack content; our adversaries will too.

The problem is structural. They share a narrative in which America is eternally under threat from enemies outside and subversives within; they see life as a battle between patriots and traitors.

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