Answer:
a. fission reactions because nuclear power comes from nuclear fission
A representative particle is the smallest unit of a substance that can be broken down without altering the composition. Matter is composed of three types of representative particles: atoms, molecules and formula units.
Atoms and Elements
Atoms are the smallest particle that can be split. Substances that contain only one kind of atom are called elements.
Molecules
The molecule is the representative particle of molecular compounds. It is also the representative particle of diatomic elements.
Formula Unit
The representative particle of an ionic compound is the formula unit. A formula unit uses a formula to calculate the basic whole number ratio of the ions in an ionic compound.
Diatomic Elements
Diatomic elements, or molecules, are made up of two atoms of the same element. These diatomic elements are not part of a compound.
Answer:
11625 miles
Explanation:
A second of light is the distance that light travels in a second. It has a value of 299792458 kilometers or if we do the unit conversion, 186,000 miles. A mile is 1.609 kilometers
Let's make a rule of three:
1 light s travels a distance of 186000 miles
0.062500 light s would travel a distance of (0.062500 . 186000) = 11625 miles
Answer:
Explanation:
Hello,
In this case, since the law of conservation of mass allows us to notice that the mass of carbon in the burned compound is also present in the resulting carbon dioxide, we can compute such moles as shown below:
Next, hydrogen in the sample is present at the products in the water only, and in one mole of water, two moles of hydrogen are present, thereby:
Nevertheless, the amount of oxygen in the sample must be computed by subtracting both the mass of carbon and hydrogen from the previously computed moles:
And the moles:
Next, we compute the mole ratios with respect to the element having the smallest number of moles (oxygen) to obtain the subscripts in the empirical formula:
Then, we have:
Finally, by multiplying by two, we obtain the smallest whole subscripts:
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