Which legal principle refers to the governance of a nation through well-defined laws rather than an arbitrary exercise of power by individuals?
Solved
Show answers
More tips
- S Science and Technology Understanding Magnetic Storms: A Guide to This Natural Phenomenon...
- D Dating, Love, Relationships How Long Can Love Last?...
- A Auto and Moto Mastering One-Movement Parking: All You Need to Know...
- C Computers and Internet How to Properly Order Clothing from International Online Stores...
- H Health and Medicine Headache: A Comprehensive Guide to Treatment...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- F Food and Cooking How to Quickly Put your Child to Sleep?...
- C Computers and Internet How to Create a Website for Free and Easy?...
- F Family and Home Parquet or laminate, which is better?...
Answers on questions: Chemistry
- H Health La enfermedad cisticercosis es crónica...
- H History Which of the following best describes the first continental congress of 1774? the first continental congress was a meeting in boston to discuss how to handle an unwanted...
- E English I want to know like what are words and phrases admired in the book the book is the basketball mystery the boxcar children so I have to write a definition of the words and...
- E English Select three questions that are open ended, precise, and likely to produce detailed, interesting answers in an interview with Rikki-tikki-tavi. How did you feel fighting...
Ответ:
Principle requiring the government to be conducted according to law. Everyone is answerable for their acts and no one is above the law.
Ответ:
Explanation:
We are asked to find how many molecules of methane are in 14.8 grams of the substance.
1. Convert Grams to MolesFirst, we convert grams to moles. We use the molar mass, or the mass of 1 mole of a substance. These values are equivalent to the atomic masses found on the Periodic Table, however the units are grams per mole instead of atomic mass units.
We are given the compound methane, or CH₄. Look up the molar mass of the individual elements (carbon and hydrogen).
C: 12.011 g/mol H: 1.008 g/molCheck the formula for subscripts. Hydrogen (H) has a subscript of 4, so there are 4 moles of hydrogen in 1 mole of methane. We must multiply hydrogen's molar mass by 4, then add carbon's molar mass.
H₄: 1.008 * 4 = 4.032 g/mol CH₄: 12.011 + 4.032 = 16.043 g/molNow we use dimensional analysis to convert. To do this, we set up a ratio using the molar mass.
Since we are converting 14.8 grams of methane to moles, we multiply by this value.
Flip the ratio so the units of grams of methane cancel.
2. Moles to MoleculesNext, we convert moles to molecules. We use Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this problem, the particles are moles of methane. Set up another ratio using Avogadro's Number.
Multiply by the number of moles we calculated.
The units of moles of methane cancel.
3. RoundThe original measurement of grams (14.8) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 5 in the thousandth place tells us to round the 5 in the hundredth place up to a 6.
14.8 grams of methane is equal to approximately 5.56 × 10²³ molecules of methane.