kiekie1986
28.06.2019 •
Chemistry
For which of the following conversions does the value of the conversion factor depend upon the formula of the substance? a) moles of any substance to number of particles b) volume of gas (stp) to moles c) mass of any substance to moles d) density of gas (stp) to molar mass
Solved
Show answers
More tips
- A Animals and plants How to Store Carrots: Tips for Homeowners...
- L Legal consultation Juvenile Justice: Who Needs It?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
Answers on questions: Chemistry
- C Chemistry In this periodic table, which type of element is shown in green boxes? A. Noble gases B. Metalloids C. Nonmetals D. Metals...
- M Mathematics There are 5 hidden treasures in Level 1 of a smartphone game. Each of the other levels has 1 more hidden treasure than the previous level. a. How can you use the level number in...
- C Chemistry Fuerza neta es la resultante de todas las fuerzas que actúan sobre un cuerpo...
- C Chemistry What is domain and range in algebra...
- B Business Molly goes shopping at Publix, picks up 25 items that she needs for the week, and is quickly on her way. Publix, being an intermediary, makes it possible for Molly to buy all of...
Ответ:
For which of the following conversions does the value of the conversion factor depend upon the formula of the substance?
The answer is C
Ответ:
The answer is: C) mass of any substance to moles.
To converte mass to amount of substances, mass must be divided by molar mass (n = m ÷ M).
Molar mass M represent the mass of a substance divided by the amount of substance. If the formula is not correct, amount of substance is not correct.
For example, calculate molar mass of iron(II) chloride:
Atomic mass of iron is 55.8 g/mol.
Atomic mass of chlorine is 35.5 g/mol.
If compound is FeCl, molar mass would be 55,8 g/mol + 35,5 g/mol = 91,3 g/mlo, that is not correct.
If compound is FeCl₂, malar mass of compound would be:
55,8 g/mol + 2·35,5 g/mol = 126,8 g/mol, that is correct.
Ответ:
The pH of the solution is 7.8
Explanation:
The concentration of the solution is 0.001M and the dye could be in its protonated and deprotonated forms. If the concentration of the protonated form [HA] is 0.0002 M the concentration of the deprotonated form will be the subtraction between the concentration of the bye and the concentration of the protonated form:
[A-] = 0.001M - 0.0002M = 0.0008M
Also, the Henderson-Hasselbalch equation is
this equation shows the dependency between the pH of the solution, the pKa and the concentration of the protonated and deprotonated forms. Thus, replacing in the equation