CHEMISTRYYY!!!!

what are the organic compounds (list 6,)

• 1. Methane (CH4), 2. Ethanol (C2H5OH), 3. Acetic acid (C2H4O2), 4. Glucose (C6H12O6), 5. Benzene (C6H6), 6. Octane (C8H18)
• Carbon, Phosphorus, hydrogen, oxygen, nitrogen and sulfur.

• Iron oxide (Fe2O3)
• Sodium chloride (NaCl)

  chlorine(cl)

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What 4 elements make up 95% of the human body weight?

• Copper, Manganese, Selenium, Iodine
• Oxygen, Carbon, Hydrogen, Nitrogen also known as chon.

• Sodium, Magnesium, Chlorine, Zinc
• Calcium, Phosphorus, Potassium, Iron

What is a subscript?

• A subscript is a character set above the baseline of text.
• A subscript is a mathematical operation performed on numbers.
• A subscript only applies to the element directly before the #.

• A subscript is a type of font style used for headings.

Coefficient meaning :

• A coefficient is a type of variable in an equation.
• A coefficient is the sum of all terms in an expression.
• It tells you how many molecules are in an element or compound you have in a formula.

• A coefficient is a graphical representation of data.

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Is the coefficient a big # or little number in a formula?

• big number

• The coefficient cannot be a decimal.
• The coefficient is always a little number.
• The coefficient is always a big number.

What is the Law of conservation of masss?

• Mass can be created or destroyed in chemical reactions.
• The total mass of a system can change over time.
• The Law of Conservation of Mass states that mass cannot be created nor destroyed. The mass of reactants must equal the mass of the product.

• Mass is only conserved in open systems.

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What's also another true thing about the law of conservation of mass?

• Most chemical reactions use or release energy in the form of heat to the environment.

• Mass is only relevant in biological processes.
• Mass is lost during physical changes.
• Mass can be created in chemical reactions.

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• Chemical formulas are only used in organic chemistry.
• Chemical formulas represent the physical state of a substance.
• They tell us which elements are in a substance. They also tell us how many atoms of each are present.

• Chemical formulas are used to describe the color of compounds.

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• A chemical equation is a description of a physical change.
• A chemical equation is a symbolic representation of a chemical reaction. It uses chemical formulas . Shows reactants and then products.

• A chemical equation is a method for measuring temperature changes.
• A chemical equation is a list of all elements in the universe.

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What is a molecule?

• A molecule is a single atom.
• A molecule is a large structure made of cells.
• A molecule is a type of chemical reaction.
• A molecule is made up of 2 or more elements whether they are the same(elements) or different(compounds)

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