Let's </span>assume that the given gas is an ideal gas. Then we can use ideal gas equation,<span> PV = nRT<span> </span> Where,
P = Pressure of the gas (Pa)
V = volume of the gas (m³)
n = number of moles (mol)
R = Universal gas constant (8.314 J mol</span>⁻¹ K⁻¹)<span>
T = temperature in Kelvin (K) <span> The given data for the gas </span></span>is,<span>
P = 777 torr = 103591 Pa
V = </span>125 mL = 125 x 10⁻⁶ m³<span>
T = (</span>126 + 273<span>) = 399 K
R = 8.314 J mol</span>⁻¹ K⁻¹<span>
n = ?
By applying the formula, 103591 Pa x </span>125 x 10⁻⁶ m³ = n x 8.314 J mol⁻¹ K⁻¹ x 399 K<span> n = 3.90 x 10</span>⁻³<span> mol
</span>Moles (mol) = mass (g) /
molar mass (g/mol)<span>
Mass of the gas = </span><span>0.281 g </span>Moles of the gas = 3.90 x 10⁻³ mol <span>Hence, molar mass of the gas = mass / moles = 0.281 g / </span>3.90 x 10⁻³ mol <span> = 72.05 g/mol
Beryllium has an electronic configuration of 1s2 2s2 in its natural state. When in an ion state of Be2+ it loses the electrons in a 2s shell and has a configuration of 1s2. This means that Be2+ has 2 electrons.
The limiting reactant is the substance of the reactants that runs out first. The excess reactant is the substance with the greater amount than necessary to react completely with the limiting reactant after a chemical reaction.
The scientists use the method of cytokinesis to grow new plants, and they represent a method of plant growth substance and that promotes the division of cells through the cutting of plant roots and stem. They involve in cell growth and differentiation.
This method leads to cell growth man farmers use it for increasing their crop yields. As an application of this method to cotton plants can lead to a 5 to 10% increase during the drought conditions.
