![yabfegi9669](/avatars/3533.jpg)
yabfegi9669
16.10.2020 •
Chemistry
How many atoms are in the following formula?
3Al2O3
Solved
Show answers
More tips
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
- G Goods and services How to Choose the Right High Chair for Your Baby?...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
Answers on questions: Chemistry
- C Chemistry The sum of 32/4 and 3...
- C Chemistry 2 science questions I am a bit stuck on, help much appreciated thank you ^^ (cant attach files for some reason) question - (b) Greenhouse gases cause global climate change.Give...
- C Chemistry Examine the chemical equation: C17H170N3(s) + 2C4H603(1) -- C2182105N(s) + 2C2H4O2(1)Does the equation describe a chemical change or a physical change? Explain....
- C Chemistry A 30.00 mL of solution of l was treated with 50.0 mL of 0.365 M AgNO3.Agl(s) was filtered off, and the filtrate (plus Fe3+) was titrated with 0.287M KSCN. When 37.60 mL had been...
- C Chemistry Help meeeee pleaseee...
- C Chemistry If a plant produces 4.76 mol of c6h12o6, how many moles of h2o are needed...
- C Chemistry Consider the following three-step mechanism for a reaction: cl2(g)⇌2cl(g)fast cl(g)+chcl3(g)→hcl(g)+ccl3(g)slow cl(g)+ccl3(g)→ccl4(g)fast what is the overall reaction?...
- C Chemistry All of the following are a change from a more condensed to a less condensed state of matter except (2 points) condensing boiling evaporating melting...
- E English Which approach does NOT help you connect your research to your thesis statement? A) providing a list of facts that you found interesting about the topic B) having each fact in a...
- P Physics The additional product of the nuclear fission reaction shown in the equation is _. (Hint: Pay attention to the coefficient.) * 23ZU +ón- 36n+ 3Ba +_ A-91Kr 36 B-92Br 35 C-93Kr 36...
Ответ:
Percent composition by element
Element Symbol # of Atoms
AluminiumAl 2
Oxygen O 3
so 2+3= 5 atoms
hope it helps : )
Explanation:
Ответ:
15 atoms total
Explanation:
2 Al atoms + 3 O atoms = 5 Al2O3 atoms
5 Al2O3 atoms * 3 = 15
another way to do it is:
2 Al atoms * 3 = 6 Al atoms
3 O atoms * 3 = 9 O atoms
6+9 =15 atoms total
Ответ:
Explanation:
Particles A and C are shown as if they are on the same vertical line, which means with the same kinetic energy. Both particle A and C are to the lett of particle B, which means that the formers have a lower kinetic energy than the latter.
Since the likelyhood of a particle to participate in the reaction increases with the kinetic energy, particle B is more likely to participate in the reaction than particles A and C. Hence, the first choice is incorrect.
The graph, although not perfectly symmetrical, does show a bell shape, hence there are many particles will low kinetic energy and many particles with high kinetic energy. You cannot assert that most of the particles of the two gases have high high speeds. Hence, second statement is incorrect, too.
At high values of kinetic energy (toward the right of the curve), the line labeled T₁ is higher than the line labeled T₂, meaning that at T₁ more particles have an elevated kinetic energy than the number of particles that have an elevated kinetic energy at T₂.
On the other hand, at low values of kinetic energy (toward the left of the curve) the line T₂ is higher than the line T₁, meaning that at T₂ more particles have a low kinetic energy than the number of particles that have low kinetic energy at T₁.
Hence, the last two paragraphs are telling that the average kinetic energy of gas particles at T₂ is is lower than the average kinetic energy of gas particles at T₁.
Since the average speed is proportional the the square root of the temperature, the same trend for the average kinetic energy is true for the average speed, and you conclude that the last statement is true: "The average speed of gas particles at T₂ is lower than the average speed of gas particles at T₁".
Since more particles at T₁ have high kinetic energy than the number of particles at T₂ that have a high kinetic energy, more particles of gas at T₁ are likely to participate in the reaction than the gas at T₂, and the third statement is incorrect.