Activity In this activity, you will explore the use, appearance, and conservation of a mineral. Start by choosing one of the minerals
listed below. Click the mineral name to access its data sheet from the US Geological Survey (USGS). Use the information
from the data sheet and from page three of the recycling data table to answer questions about the mineral.
. Chromium
• Copper e
Lead e
. Nickel
Titanium e
Zince
.
Part A
Which mineral did you choose? What is one way that this mineral is used in your home?
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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.

What woukd most likely be the transmittance at a 0.70 m solution of solute a? a) 7.6%b) 1.1%c)4.0%d)4.6%

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both