Answer:
Cedar, mahogany, red wood or something else is fine, but the only downside is that it will cost you more. However, a project that is partially or fully exposed to the elements, something more than normal lumber is a must. The most cost effective method is to use pressure treated lumber.
Explanation:
This problem is providing us with the percent composition of a compound containing magnesium, nitrogen, oxygen and water. Thus, the empirical formula is required and found to be Mg(NO₃)₂·6H₂O.
<h3>Empirical formulas</h3>
In chemistry, empirical formulas are used in order to figure out the minimum whole-number representation of a molecular formula, which contains the actual number of atoms.
Thus, we start determining it by assuming the given percentages as masses and calculating the moles with the atomic or molar mass of the involved species:
Next, we divide by the 0.386 as the smallest number of moles in order to determine their subscripts in the chemical formula:
Hence, the empirical formula turns out to be Mg(NO₃)₂·6H₂O, which is actually a hydrate (hexahydrate).
Learn more about percent composition: brainly.com/question/12247957
I cant see anything, can you provide a picture or something please
Answer:
Water and Ammonia will form Solution.
Explanation:
Solution is a Homogeneous mixture of two or more components. The solute present in the solvent can not be distinguished neither microscopically nor visually. This formation of Homogeneous mixture usually takes place due to greater intermolecular interactions between the Solute and Solvent. Hence, in given scenario we are not given with the amount of components, therefore we can decide on the basis of interactions between the components.
In case of Water and Ammonia there exist a stronger type of intermolecular interactions called as Hydrogen Bond Interactions as in both compounds Hydrogen atoms are attached to more electronegative atoms like Oxygen and Nitrogen. Hence, as Like Dissolves Like, so these two components will form a Solution.
While in second case, Pentane is a non polar compound while Sodium Chloride is an ionic compound with positive Na and negative Cl. So, these two compounds cannot interact with each other, Hence will fail to form a solution and results in the formation of Suspension.
Because of the Law of Conservation of Energy, the heat loss plus the heat used to combust the sample should calculate to the actual heat capacity. A calorimeter is ideally an insulated vessel. However, in reality, heat is dissipated. Therefore, the heat capacity that we calculate in the experiment will always be less than the actual value. This is accounted by the heat lost.