Hey there!
From ideal gas equation we know, PV = nRT
All the terms have their usual significance.
PV =w/M * RT
( where , n is number of moles = w/M, we = weight of gas, M = molecular weight of the gas)
Therefore, PV = wRT/M
At standard conditions , value of pressure, P = 1atm and standard temperature, T = 273K
And value of universal gas constant, R = 0.082 lit. atm. K⁻¹.mol⁻¹
Given that, weight of gas,
w = 5.60g and volume of gas,
V = 500mL = 0.5 Liters
Therefore, substituting all the value, we get :
Molar mass = 5.60 * 0.082 * 273 / 1 * 0.5
Molar mass = 250.7232 g/mole
Answer:
The correct answer is <em>C) Two atoms of silver are needed to complete the reaction.</em>
Explanation:
The Law of Conservation of Matter postulates that "the mass is not created or destroyed, only transformed." This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends.
Then, taking into account the Law of Conservation of Matter, as an atom cannot be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
For this, the chemical equation must be balanced. For that, you must first look at the subscripts next to each atom to find the number of atoms in each compound in the equation. If the same atom appears in more than one molecule, you must add its quantities. On the other hand, the coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts. By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
In this case:
Left side: 2 silver (Ag), 2 hydrogen (H) and 1 sulfur (S)
Right side: 2 silver (Ag), 2 hydrogen (H) and 1 sulfur (S)
In this case the equation is balanced because you have the same amount of all the elements on each side of the reaction. And <u><em>the 2 in front of 2Ag indicates that,since silver is a reagent, two atoms of silver are needed to complete the reaction. (option C).</em></u>
an element's name, chemical symbol, atomic number, atomic mass.
IDK what you are even asking for
<span>Inside the nucleus of an atom are protons and electrons. </span>
<span><span>Number of Protons-19 </span><span>Number of Neutrons-20 </span><span>Number of Electrons-<span>19</span></span></span>
