Atom is a neutral element found in nature without any charge. In other words, it has same number of Protons and electrons, whereas ion is a charged thing, either positive or negative. We can find their charge by:
Charge = Number of Protons - Number of Electrons
Hope this helps!
Answer:
Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
Gravitational energy or gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity. It is the potential energy associated with the gravitational field, which is released when the objects fall towards each other.
In science and engineering, the weight of an object is the force acting on the object due to gravity. Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of the gravitational force
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Explanation:
The correct answer is D) Ar
Answer:
The answer to your question is 1.49 mol of Cl₂
Explanation:
Data
mass of Al = 40.5 g
mass of Cl₂ = 212.7 g
moles of excess reactant = ?
- Balanced chemical reaction
2 Al(s) + 3Cl₂(g) ⇒ 2AlCl₃
Process
a) Calculate the molar mass of the reactants
molar mass of Al = 2 x 26.98 = 53.96 g
molar mass of Cl₂ = 6 x 35.45 = 212.7 g
b) Calculate the theoretical proportion Al/Cl₂ = 53.96/212.7 = 0.254
Calculate the experimental proportion Al/Cl₂ = 40.5/212.7 = 0.19
As the experimental proportion is lower than the theoretical proportion we conclude that the limiting reactant is Aluminum.
c) Calculate the grams of excess reactant
53.96 g of Al ------------------ 212.7 g of Cl₂
40.5 g of Al ------------------- x
x = (40.5 x 212.7) / 53.96
x = 8614.35 / 53.96
x = 159.64 g of Cl₂
Excess Cl₂ = 212.7 - 159.64
= 53.057 g
d) Calculate the moles of Cl
35.45 g of Cl ----------------- 1 mol
53.057 g of Cl --------------- x
x = (53.057 x 1)/35.45
x = 1.49 mol of Cl₂
