silica in class guide 472

Paragraph 5: Discuss Fractional Distillation of petroleum oil to give the chemical feedstock to make synthetic polymers for commercial use of products in our daily lives and discuss your personal thoughts on incresing US drilling in the Gulf of Mexico or in the Artic. Think about it, every time you go to the grocery store and get a plastic bag which immediately gets discarded. Include your thoughts on mandatory recycling in the US especially for schools, government buildings, etc.

Direction: Classify each example below. Write C, if it is chemical, M, if it is mechanical, and B, if it is Biological Weathering. 1.) A seed has found its way into a rock and a plant is beginning to split the small stone. 2.) The pollution has recently been high, and acid rain is destroying some monuments. 3.) A combination of fungi and algae grow upon the surface of a rock slowly "eating it away". 4.) Flooding has caused a landslide and part of the hillside has been affected. 5.) The salty water of the ocean is eating away the concrete support posts of the pier.

What distinguishes substances like salt and sugar from those found in e-waste like lead,mercury, cadmium and arsenic?

Can someone draw a chemical structure for this? Like how they put them pictures in the books.

EXTRACTION OF A PURE METAL FROM A METAL ORE closely follows one method of making copper metal in the industry. Imagine doing this reaction on a much larger scale (thousands of tons a day instead of a few grams). What effects could this process have on the environment?

2Na + BaCl2 --> Ba + 2NACI is what type of reaction?

QUESTION 4 From the Coursebook: What is a useful marker point for the Global Anthropocene? When glacial sediments are replaced by organic sediments When Carbon Dioxide (CO2) and Methane (CH4) first get recorded in rocks and sediment When Carbon Dioxide (CO2) and Methane (CH4) first appeared in the atmosphere Excess of radioactive isotopes such as 14C and 239Pu in rocks and sediments

what is the Gravimetric analysis? how we can use it to determine the Phosphorus content of commercial plant food?

7. Methylhydrazine is commonly used as a liquid rocket fuel. Its combustion is indicated by the following reaction. N₂H3 CH3(1) + O20) → N2(9) + CO2(g) + H₂O (9) a. Balance this equation. b. Calculate AH for this reaction.

How is using thamine as a catalyst rather than cyanide an application of green chemistry?

Form a hypothesis that might explain which season is CO2 concentration the highest and which season the lowest and write a brief description explaining why it is the way it is. Hint: Plant photosynthesis reduces the CO2 concentration and decay processes increase

Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose. What is another name for dynamite?     KBr     KOH     TNT     C-4     CFC

The research group has recently focused on identifying the chemical properties of fluorocarbons, such as CF4 and C2F4. These fluorocarbons display a very different reactivity compared to hydrocarbons. Teflon (C2F4)n is a fluoropolymer. When Teflon is mixed with silica at high temperature, all solid decomposes into gases. Write down the reactions that can take place during the process and explain your reasoning.

-> Review A Bookmark Concept S21 / 6 of 16 What is the percentage of metal in the compound Iron (III) Chromate (Fe2(CrO4)3)? O A. 24.30% B. 58.23% C. 55.78% D. 39.79%

3.Which of these processes produces carbon dioxide?    A-photosynthesis   B-burning of fossil fuels   C-animal perspiration   D-planting trees