The charge is neutral.
To find the charge, subtract the number of electrons from the number of protons. Because they are the same, there is no charge.
Calculate the pressure using the Van der Waals equation and the pressure using the ideal gas equation PV=nRT. Subtract the two pressures to get the difference. then:<span>Calculate how many moles of ammonia you have using the ideal gas equation PV=nRT. Multiply the number of moles by the molar mass of ammonia to get the mass in grams.</span>
The question has mentioned three solvents: water, ethanol, and diethyl ether. Water is miscible with ethanol but not diethyl ether. As a result, it would be possible to separate a mixture of water and diethyl ether with a separatory funnel but not a mixture of water and ethanol using such techniques.
Substance X dissolves well in diethyl ether but not in water; substance Y dissolves well in water but not in diethyl ether. As a result, the two components of this mixture would end up in different layers when dissolved in a mixture of water and diethyl ether- which separate into two layers itself. One would expect to find
- a solution mostly of substance X in the diethyl ether layer, and
- a solution mostly of substance Y in the water layer.
Given the fact that diethyl ether has a density less than that of water (
as opposed to 
,) it would form the upper layer of its mixture with water. Separate the mixture with a separatory funnel. The question stated that both X and Y are under the solid state while the two solvents are both liquidsm implying that the boiling points of both species are higher than that of their respective solvent. Therefore heat the solutions till all solvent had evaporated to obtain X and Y.
Answer : Option B) Attempt to control the conditions.
Explanation : While conducting an experiment, a scientist should always attempt to control the reaction conditions.
If the reaction conditions are not controlled one can lose the expected result or observation that was supposed to be generated from the experiment. Like controlling the given temperature, pressure, addition of catalysts, etc. If these conditions are overlooked one may not achieve the expected results and will not reach to the conclusion.
