When given the pressure and force of a system , how should the pressure formula be rearranged to solve for area
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Answer:
Area = force /pressure
Explanation:
Force is a push or pull. It is the product of mass and acceleration. When force is applied on a body of mass m, an acceleration of a is produced.
Pressure is defined as the force per unit area.
Pressure =
Area =
The SI unit of force is Newton (N), pressure is Pascal (Pa) and area is meter square (m²)
so if u want the area
area = force /pressure
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First of all you need to find 1 mole of Lithium by diving 1.68 mol by 4 and the answer should be 0.42 mol. To calculate the no. of moles of lithium oxide, you've to multiply 0.42 mol by 2. Hence the answer, 0.84 mol.
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First, let's add up all of the elements to find the total mass of the compound.
We know that there is 1 iron, 1 titanium, and 3 oxygen. We will reference the periodic table, and use the element's atomic weight.
Fe x 1: (55.85g x 1) = 55.85g
Ti x 1: (47.87g x 1) = 47.87g
O x 3: (16.00g x 3) = 48.00g
--------------------------------------
+ 151.72g
Now to find the percentage of titanium in the compound, we are going to divide the atomic weight of titanium by the total weight of the compound, and multiply by 100.
(weight of Ti) / (total weight of FeTiO3) x 100 = percent of Ti%
47.87g / 151.72 x 100 = 31.55%
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Answer:
A carbon-14 atom has 6 protons, 8 neutrons and 6 electrons. The number 12 or 14 in the name of carbon-12 and carbon-14 refers to their atomic mass.
Explanation:
Those atoms that have the same "atomic number" but differente "atomic mass" (or atomic weight) are called isotopes.
Atomic number indicates the amount of electrons that an atom has, which matchs with the number of protons it has.
Atomic mass indicates the sum of protons and neutrons that an atom has.
Example with carbon-12:
carbon atomic number = 6 (find this information in a periodic table)
electrons= 6
protons= 6
carbon atomic mass = 12 (find this information in a periodic table)
neutrons= atomic mass - number of protons= 12-6 = 6 neutrons
Using the same analysis for carbon-14:
carbon atomic number = 6
electrons= 6
protons= 6
carbon atomic mass = 14
neutrons= atomic mass - number of protons = 14-6 = 8 neutrons
In this way, carbon-14 is an isotope of carbon-12 because carbon-14 has the same atomic number than carbono-12 but different atomic mass.
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