The Philippines are rich in natural resources, which is leading to rapid development, meaning a huge ecological impact on the environment. The Philippines have started following the Ecological Footprint to help reduce their consumption of resources, and it has begun looking at ways to develop the Laguna Lake to help restore balance to the country.
There are several different types of feldspar, but they all contain aluminum, oxygen, silicon and 1 or more alkaline earth metals or alkali metals. The feldspars are not molecular, they have giant polymeric anions with cations in voids in the crystal. The feldspars are minerals, some have a definite chemical composition but many do not. What is common to all of them is that the number of (Si + Al) atoms is half that of oxygen- becuse tetrahedral [AlO4 ] units replace tetrahedral [SiO4] units in silica SiO2 framework and because the net effect is replacing Si4+ with Al3+ this creates a polymeric anion , and the charge balancing cations sit in the voids in the structure. You just take the formula and count how many atoms you see, paying attention to whatever subscripts and parentheses there might be. Because these are minerals the formulas can a look a little strange to chemists. For example labradorite, (Ca,Na)Al(Al,Si)Si2O8 In this the ratio ratio of Si:Al overall is between 3:1 and 1:1. The more Al in the mineral the more negative charge on the polymeric anion and the more balancing calcium and sodium cations there will be. The polymeric anion has 8 oxygen atoms so we expect there to be 4 balancing silicon and aluminium atoms. The formula shows there are three definites 2 silicon atoms and one aluminium, and the fourth is a mixture of Si and Al shown by the (Si, Al) part. If the fourth atom were all Si the ratio is 3:1 , if it were all aluminium it would be 1:1.
contex clues are words in a sentence that help you understand the meaning of a word you don't know [usually contex clues are before or after the word]
check your answer
RUSSIA
A Good Guess
you cant it is imposible
high contex
Wyoming, Alaska, Hawaii are definites...not sure on the fourth but would guess North Dakota
tyler burris in 4th hour contex geometry
CONTEX Summit is a package that allows for conference and collaboration among a large number of networked computers. It is designed to support all types of calls and can accommodate remote networks of thousands of individual PCs.
socail contex! yoo.
If you mean ethereal elements (Fire, Water, Earth, Wind) then three. But if you're talking the periodic table of the elements...then I am not sure. Oxygen and carbon are definites...
Epicurean Tourism is the enjoyment of a different culture and a different lifestyle through The cuisine and the foods enjoyed in their own cultural contex