Your dad is working on creating a brick border for the lake in your backyard each brick has a mass of 100 g and a volume of 20 cm3. what is the density of the brick? explain the steps you took the solve this problem showing your work then explain of the brick will float or not if it falls in the lake. why or why not (50 POINTS)

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

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.

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?