A train travels from New York to Washington D.C. daily following a fairly straight path. If you made a scale model of the train tracks and determined that the distance the train travels is 240 inches, what is the most likely scale you are using?
A.
1 inch = 1 inch
B.
1 inch = 1 foot
C.
1 inch = 1 mile
D.
1 inch = 1 yard
Solved
Show answers
More tips
- P Philosophy Why Did God Create Man and Place Him in Obscurity?...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Chemistry
- C Chemistry A compound was analyzed in a lab to determine its empirical formula. Decomposition of the compound at a standard temperature and pressure produced 9.00g carbon,...
- C Chemistry How many ions are found in 7.64g of KI? please show work...
- C Chemistry What must happen to break a chemical bond? Energy must be released. Electrons must be provided. Energy must be provided....
- C Chemistry Will Give Brailest pls help its a test...
- C Chemistry Why is it important that the perodic table is structured as a table rathe than a list of elements. please answer me...
- C Chemistry Describe why we experience seasons. Include words: tilt, axis, orbit, angle of sun....
- C Chemistry Calculate AGrxn for this equation, rounding your answer to the nearest whole number....
- C Chemistry Volume of 125 g of oxygen gas (O2) at STP?...
- C Chemistry Explain and define the principle quantum number without the internet....
- C Chemistry I got tha last one wrong Wha this one ?...
Ответ:
Mass of iron oxide: 79.85 g
Explanation:
Given data:
Mass of iron = 112 g
Mass of O₂ = 24 g
Mass of iron oxide formed = ?
Solution:
4Fe + 3O₂ → 2Fe₂O₃
Number of moles of Fe:
Number of moles = mass/ molar mass
Number of moles = 112 g/ 55.85 g/mol
Number of moles = 2 mol
Number of moles of O₂:
Number of moles = mass/ molar mass
Number of moles = 24 g/ 32 g/mol
Number of moles = 0.75 mol
Now we will compare the moles of oxygen and iron with iron oxide.
Fe : Fe₂O₃
4 : 2
2 : 2/4×2 = 1
O₂ : Fe₂O₃
3 : 2
0.75 : 2/3×0.75 = 0.5
The number of moles of iron oxide formed by oxygen are less thus it will be limiting reactant.
Mass of iron oxide:
Mass = number of moles × molar mass
Mass = 0.5 mol × 159.69 g/mol
Mass = 79.85 g