Handcrafted soaps can be prepared at home and are often enri…
Handcrafted soaps can be prepared at home and are often enriched with essential oils. A simple procedure to prepare this soap is given below. Step 1 Place 0.175 L of H2O(l) in a pot and place the pot into an ice bath. Step 2 Slowly add 50.0 g of NaOH(s) into the water. Step 3 Mix together olive oil, coconut oil, and salt in a large bowl. Step 4 Slowly add the NaOH(aq) in the pot to the oil mixture and let set for 24 hours. The molar concentration of the NaOH(aq) solution prepared in Steps 1 and 2 is ______ mol/L. Answer should be recorded as 3 digits (Ex. 1.23) – Do Not include Units
Read DetailsIn a Chemistry laboratory, a student titrated samples of sod…
In a Chemistry laboratory, a student titrated samples of sodium hydroxide, NaOH(aq), with a standardized solution of hydrochloric acid, HCl(aq). In this investigation, the net ionic equation that represents the reaction that occurs is i , and this reaction is completed at the ii . The statement above is completed by the information in row i ii A. NaOH(aq) + HCl(aq) → HOH(l) + NaCl(aq) endpoint B. NaOH(aq) + HCl(aq) → HOH(l) + NaCl(aq) equivalence point C. H3O+(aq) + OH–(aq) → 2 H2O(l) endpoint D. H3O+(aq) + OH–(aq) → 2 H2O(l) equivalence point
Read DetailsA diver blows a 0.750 L air bubble underneath the water. As…
A diver blows a 0.750 L air bubble underneath the water. As it rises to the surface, the pressure changes from 2.25 atm to 1.03 atm. The volume of the air bubble at the surface is ______ L. Answer should be recorded as 3 digits (Ex. 1.23) – Do Not include Units
Read DetailsIn order to prepare 250.0 mL of a 0.400 mol/L solution of th…
In order to prepare 250.0 mL of a 0.400 mol/L solution of the weed-killer, the initial volume of the 1.17 mol/L solution of weed-killer that should be used is ________ mL. Answer should be recorded as 3 digits (Ex. 12.3) – Do Not include Units
Read DetailsPlease complete this question on a blank piece of paper, ens…
Please complete this question on a blank piece of paper, ensuring to show all of your work During the Apollo 13 mission, astronauts had to modify lithium hydroxide, LiOH(s), canisters to survive after an explosion damaged the spacecraft. The purpose of these canisters was to remove carbon dioxide, CO2(g), from the air as represented by the following unbalanced equation. ___ LiOH(s) + ___ CO2(g) → ___ Li2CO3(s) + ___ H2O(l) What mass of LiOH(s) could remove the CO2(g) in 500.0 L of air when the pressure and temperature are 0.0405 kPa and 20.0°C?
Read DetailsMagnesium is an essential plant nutrient as it is necessary…
Magnesium is an essential plant nutrient as it is necessary component of chlorophyll. Magnesium is added to fertilizers in the form of magnesium nitrate, Mg(NO3)2(s), in order to maintain a soil concentration of 60.0 ppm magnesium. The mass of magnesium in 20.0 kg of soil is:
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