Considering that the mantle is 44.8% oxygen and 21.5% silicon by mass, calculate the mole ratio of oxygen atoms to silicon atoms in the mantle.
Solved
Show answers
More tips
- H Health and Medicine Discover the Hidden Principles and Real Results of the Japanese Diet...
- C Computers and Internet Google Search Tips and Tricks: Everything You Need to Know...
- F Food and Cooking Experts Name Top 5 Healthiest Teas...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- F Food and Cooking How many stages of coffee roasting are there?...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- H Health and Medicine Boosting Immunity: A Complete Guide on How to Improve Your Body’s Natural Defenses...
Answers on questions: Chemistry
- C Chemistry A gas occupies 12.5 ft at -- 173 °C. At what Celsius temperature will its volume be 16.0 ft Assume that pressure remains constant....
- C Chemistry The graph shows the relationship between each player s gains and Strikes it determine which team member have the same radio of game to strake and select the confusion...
- C Chemistry Please help, I don’t know what I’m doing...
- C Chemistry 1 poin What is the complementary sequence of the following strand of DNA: GTTAACCTGTAC *...
- C Chemistry HELP M Winds and ocean breezes occur due to . A. None of these B. Conduction currents C. Boiling D. Convection currents...
- C Chemistry which option is an example of a chemical property? A ability to decompose B color C melting point D density which option is an example of a chemical property A boiling...
- C Chemistry Genetic diversity is crucial to a species chance of survival over generations true or false?...
- C Chemistry Fractional distillation is a technique used to separate complex mixtures of hydrocarbons based on differences in their...
- C Chemistry Hy did dr. tyson decide to exclude pluto from the exhibits of planets...
- C Chemistry When two atoms with different electronegativities are bonded together, a bond exists. these are displayed with an arrow originating at the atom with the electronegativity...
Ответ:
The mantle has a mass of around that is around 68.4% of earth's mass.
So to calculate moles we need to first find out the mass of oxygen and silicon present in mantle. It is given that oxygen is 44.8% by mass in mantle and 21.5% by mass in mantle, therefore to calculate its mass, we need to use
Now, to calculate mass percentage of oxygen
Similarly the mass of silicon can be calculated
Now, the moles of any substance is calculated by
where, mass of oxygen in kilograms is
So,
Similarly
Now, to calculate mole ratio we need to divide every moles to the lowest calculated mole that is the moles of Si and round it off to the nearest whole number.
Ответ:
The mole ratio of oxygen atoms to silicon atoms in mantle is 3.6 : 1
Explanation:
To calculate the mole ratio of oxygen and silicon in mantle, use will follow some steps:
Step 1: Converting Mass percent into mass of Oxygen and Silicon.
We are given 44.8% of oxygen is present in mantle by mass.
This means that 44.8 grams of oxygen is present in 100 grams of mantle.
Similarly, 21.5 grams of silicon is present in 100 grams of mantle.
Step 2: Calculating the moles of Oxygen and Silicon.
To calculate the number of Moles, we will use the formula:
For Oxygen:Molar mass of oxygen = 16 g/mol
Given mass of oxygen = 44.8 grams
Putting values in above equation, we get:
For Silicon:Molar mass of silicon = 28 g/mol
Given mass of silicon = 21.5 grams
Putting values in above equation, we get:
Step 3: Calculating the number of atoms of Oxygen and Silicon.
According to mole concept:
1 mole of an element contains number of atoms.
Calculating the number of atoms of Oxygen:2.8 moles of oxygen will contain atoms
Calculating the number of atoms of Silicon:0.767 moles of silicon will contain atoms
Step 4: Calculating the mole ratio of Oxygen and Silicon atoms
Mole ratio of atoms of Oxygen : Silicon =
Hence, the mole ratio of atoms of Oxygen and Silicon is 3.6 : 1
Ответ:
A) It limits the nuclear spin to certain allowed spin states.
Explanation:
A nucleus with an odd atomic number or an odd mass number has a nuclear spin, which can be observed through NMR.
A proton is the simplest nucleus, and its odd atomic number of 1 implies that it has one spin. We can visualize a spinning proton as a positively charged rotating sphere. This movement of a charged particle is like an electric current in a wired loop. It generates a magnetic field called the magnetic moment. When a small magnetic bar is placed in the field of a larger magnet, it rotates to align itself with the field of the larger magnet, a lower energy arrangement than an orientation against the field. Quantum mechanics requires that the proton's magnetic moment is aligned with the external field or against the field. The lowest energy state with the proton aligned with the field is called the spin alpha state (α spin). The higher energy state with the proton aligned against the external magnetic field is called the beta spin state (β spin).
In the absence of an external magnetic field, the magnetic moments of the protons have random orientations. When an external magnetic field is applied, each proton in a sample it assumes β state or α state. Because the state of spin α is lower in energy, there are more α spins than β spins.