The following procedures are carried out during a laboratory activity to determine the mass in a grams of CuSO4 in a sample of CuSO4.5H2O.
Step 1 - Determine the mass in grams of the crucible and CuSO4.5H20.
Step 2 - Determine the mass in grams of the crucible and CuSO4.
Step 3 - Determine the mass in grams of the CuSO4.5H2O.
Step 4 - Determine the mass of the empty crucible.
Step 5 - Determine the mass in grams of CuSO4.
Which sequence of steps would produce the desired result using on three weighings?

What is the strongest intermolecular force between an nacl unit and an h2o molecule together in a solution? covalent bonding dipole-dipole force hydrogen bonding ion-dipole force

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions.what elemental classification does oxygen belongto? done