Chemistry, 20.06.2020 20:57 christopherarreola56
Prepare the NaOH Solution
1. Take a 250 mL volumetric flask from the Containers shelf and a balance from the Instruments shelf and place them on the workbench. Zero the mass of the volumetric flask on the balance.
2. Take sodium hydroxide from the Materials shelf and add 1 g to the flask. Record the mass from the balance display.
3. Place the volumetric flask on the workbench. Add water from the Materials shelf to the volumetric flask until the meniscus of the liquid is level with the volume mark on the 250 mL volumetric flask. Zoom in on the volumetric flask for a closer view. Note: Be sure not to add too much water in this step. The volumetric flask is designed to contain a specific volume of liquid. If the volume becomes greater than the mark on the flask, the concentration is no longer accurately known and the solution needs to be remade.
Calculate the expected concentration of the sodium hydroxide solution. The molar mass of NaOH is 39.997 g/mol.
Calculate and record the expected mass of benzoic acid required to react with 20.00 mL of a 0.100 M sodium hydroxide solution.
Answers: 3
Chemistry, 22.06.2019 17:00
Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.
Answers: 2
Chemistry, 22.06.2019 21:50
28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action
Answers: 1
Chemistry, 23.06.2019 00:00
Mercury turns to a vapor at 629.88 k. how much heat is lost when 75.0 g of mercury vapor at 650 k condenses to a liquid at 297 k?
Answers: 1
Prepare the NaOH Solution
1. Take a 250 mL volumetric flask from the Containers shelf and a balance...
Physics, 11.10.2020 23:01
History, 11.10.2020 23:01
Mathematics, 11.10.2020 23:01
Mathematics, 11.10.2020 23:01
English, 11.10.2020 23:01
Mathematics, 11.10.2020 23:01
English, 11.10.2020 23:01
Advanced Placement (AP), 11.10.2020 23:01
Spanish, 11.10.2020 23:01
Biology, 11.10.2020 23:01
English, 11.10.2020 23:01
Mathematics, 11.10.2020 23:01
Mathematics, 11.10.2020 23:01