I'm not good at chem. : (
c3h8 + 5o2 --> 4h2o + 3co2

if 0.45 grams of water is formed during the combustion of propane, how many grams of carbon dioxide is formed?

There will be 0.825 grams of CO2 produced

Explanation:

Step 1: Data given

Mass of water formed = 0.45 grams

Molar mass of water = 18.02 g/mol

Molar mass of CO2 = 44.01 g/mol

Step 2: The balanced equation

C3H8 + 5O2 → 4H2O + 3CO2

Step 3: Calculate moles of water

Number of moles water = mass of water / molar mass water

Number of moles water = 0.45 grams / 18.02 g/mol

Number of moles water = 0.025 moles

Step 4: Calculate moles of CO2

For 1 mol of propane we need 5 moles of O2 to produce 4 moles of H2O and 3 moles of CO2

When 0.025 moles of H2O are produced, we'll get 3/4 * 0.025 = 0.01875 moles of CO2 produced

Step 5: Calculate mass of CO2 produced

Mass of CO2 = moles of CO2 * molar mass of CO2

Mass of CO2 = 0.01875 moles * 44.01 g/mol

Mass of CO2 = 0.825 grams

There will be 0.825 grams of CO2 produced

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environmental implications of pesticides

synthetic pesticides ensure high crop yields. while effective in achieving this goal, pesticides contaminate soil, air, ground and surface water, as well as the plants and animals that come into contact with these contaminated sources. freshwater and marine organisms are particularly susceptible to pesticides through agricultural runoff. pesticides also reduce soil fertility (necessitating the use of synthetic fertilizers) and can travel far from the original source, contaminating water and air hundreds of miles from the location of application (see references 2).

health implications of organics

although a subject of particular debate, many recent findings show that organic food is healthier than conventionally grown food. according to the usda, an extensive european union-funded study found that organically grown foods contain more beneficial compounds, such as the vitamins and antioxidants needed to combat many diseases (see references 5). organic milk, meat and eggs are regulated to ensure they are free of hormones administered to conventional livestock and poultry.

health implications of pesticides

pesticides affect human health in three ways: through skin contact, inhalation and ingestion. acute and long-term exposure to pesticides can cause serious health problems for farmers who apply them. the majority of other people are affected by drinking contaminated water and eating contaminated marine life (see references 3). pesticides have been linked to neurological disorders, endocrine and reproductive disorders, immune system deficiencies and cancer. according to the world health organization, acute pesticide poisoning (app) is responsible for significant annual mortality, especially in developing nations (see references 4).

other important considerations

not every small farm or business owner can afford the costly certification process required to be considered "certified organic," even if the farm is not using chemicals. "transitional" farms include those that once used chemicals and are now transitioning to organic-only production. in addition, though organic farming methods offer obvious environmental benefit, an organic apple shipped from around the world creates a different set of environmental problems. locally grown food (particularly locally grown, organic food) is key in sustainable food production.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be