Chapter 15 - cloudfront.net
... change is equal to the mass of all substances that remain after the change • Suppose logs in a fireplace had a mass of 85 kg • After they burn, all you see is ashes. If you weigh the ...
... change is equal to the mass of all substances that remain after the change • Suppose logs in a fireplace had a mass of 85 kg • After they burn, all you see is ashes. If you weigh the ...
Chemistry Unit Study Guide Key
... with bases 11)properties of bases – Bitter taste; slippery; pH above 7; react with acids ...
... with bases 11)properties of bases – Bitter taste; slippery; pH above 7; react with acids ...
An Introduction to Matter
... Group Tasks • Right Side: • I have developed a way to make bottled water that I guarantee will be chemical free. • Typically already, bottled water costs about $3/gallon. • You need to determine how much I should charge for Dr. Joe’s Chemical Free Water. ...
... Group Tasks • Right Side: • I have developed a way to make bottled water that I guarantee will be chemical free. • Typically already, bottled water costs about $3/gallon. • You need to determine how much I should charge for Dr. Joe’s Chemical Free Water. ...
CHAPTER 2 VOCABULARY (Highlighted)
... Smallest basic unit of matter Substance made of atoms of different elements that are bonded together in a particular ratio Chemical bond formed when two atoms share one or more pairs of electrons Substance made of only one type of atom that cannot be broken down by chemical means Atom that has gaine ...
... Smallest basic unit of matter Substance made of atoms of different elements that are bonded together in a particular ratio Chemical bond formed when two atoms share one or more pairs of electrons Substance made of only one type of atom that cannot be broken down by chemical means Atom that has gaine ...
Chemical Equations and Tests for anions
... the formula by changing the small number after an atom • This method of balancing equations is known as balancing by inspection practice with question 6.1 (a) to (n) on p77 ...
... the formula by changing the small number after an atom • This method of balancing equations is known as balancing by inspection practice with question 6.1 (a) to (n) on p77 ...
Review Sheet
... 5. Define Law of Conservation of Mass. Matter is neither created nor destroyed during an ordinary physical change or chemical reaction. 6. What do we change in a chemical equation to balance them? coefficients 7. What are six tips to balancing equations? a. Balance each type of element one at a time ...
... 5. Define Law of Conservation of Mass. Matter is neither created nor destroyed during an ordinary physical change or chemical reaction. 6. What do we change in a chemical equation to balance them? coefficients 7. What are six tips to balancing equations? a. Balance each type of element one at a time ...
Energy and Matter
... Warm up: Why is a chemical change different than a physical change? Temperature is a measure of kinetic energy Measured by thermometers Farenheit, Celcius, and Kelvin Scales C=5/9(F-32) F=(9/5C)+32 K=C+273 C=K-273 Absolute zero: where an atom has no more kinetic energy. Impossible to attain. ...
... Warm up: Why is a chemical change different than a physical change? Temperature is a measure of kinetic energy Measured by thermometers Farenheit, Celcius, and Kelvin Scales C=5/9(F-32) F=(9/5C)+32 K=C+273 C=K-273 Absolute zero: where an atom has no more kinetic energy. Impossible to attain. ...
Describing Chemical Reactions
... Characteristics of a Chemical Equation The equation must represent known facts. All reactants and products must be identified. ...
... Characteristics of a Chemical Equation The equation must represent known facts. All reactants and products must be identified. ...
Science 9
... What are the two types of reactions that involve a gain or a release of energy? Explain each type. ...
... What are the two types of reactions that involve a gain or a release of energy? Explain each type. ...
18 April 2007 - Santa Fe Institute
... Against vitalism and animism “The biosphere does not contain a predictable class of objects or of events but constitutes a particular occurrence, compatible indeed with first principles, but not deducible from those principles and essentially unpredictable” ...
... Against vitalism and animism “The biosphere does not contain a predictable class of objects or of events but constitutes a particular occurrence, compatible indeed with first principles, but not deducible from those principles and essentially unpredictable” ...
Chemical Reactions
... Law of Conservation of Mass • All chemical equations MUST be balanced because… • The Law of Conservation of Mass (or Matter) states that mass is neither created nor destroyed in physical or chemical changes ...
... Law of Conservation of Mass • All chemical equations MUST be balanced because… • The Law of Conservation of Mass (or Matter) states that mass is neither created nor destroyed in physical or chemical changes ...
Matter and Energy
... -determines the number of molecules (groups) of the formula -This number will be DISTRIBUTED just like in math. It applies to each element and is multiplied by each subscript to find the total number of atoms of each element and a total number of atoms in the molecule. ...
... -determines the number of molecules (groups) of the formula -This number will be DISTRIBUTED just like in math. It applies to each element and is multiplied by each subscript to find the total number of atoms of each element and a total number of atoms in the molecule. ...
Section 2-4 “Chemical Reactions and Enzymes”
... reaction started. Once the bonds are broken, the atoms are freed up and can make new molecules. When bonds form between the atoms to make new molecules, energy is released. The specific amount of energy that is needed to break a bond, or is releases when that same bond forms, is called bond energy. ...
... reaction started. Once the bonds are broken, the atoms are freed up and can make new molecules. When bonds form between the atoms to make new molecules, energy is released. The specific amount of energy that is needed to break a bond, or is releases when that same bond forms, is called bond energy. ...
Chapter 4
... the final solution? 4. 24.0 g of ethane (C2H6) are burned to form CO2 and H2O. How many grams of CO2 are produced? 5. 42.6 g Cu are combined with 84.0 g of HNO3 according to the unbalanced reaction below. Which is the limiting reagent and how many grams of Cu(NO3)2 are produced? ...
... the final solution? 4. 24.0 g of ethane (C2H6) are burned to form CO2 and H2O. How many grams of CO2 are produced? 5. 42.6 g Cu are combined with 84.0 g of HNO3 according to the unbalanced reaction below. Which is the limiting reagent and how many grams of Cu(NO3)2 are produced? ...
Honors Chemistry Review Packet KEY
... 35. In a physical change, the chemical composition of the substance does not change. In a chemical change, the chemical composition of the reactant(s) changes to form one or more products. 36. a) physical, b) physical, c) chemical, d) chemical 38. 43.2 grams (4.8 g hydrogen + 38.4 g oxygen = 43.2 g ...
... 35. In a physical change, the chemical composition of the substance does not change. In a chemical change, the chemical composition of the reactant(s) changes to form one or more products. 36. a) physical, b) physical, c) chemical, d) chemical 38. 43.2 grams (4.8 g hydrogen + 38.4 g oxygen = 43.2 g ...
Matter - Wsfcs
... What are the 2 most basic categories of matter? 2. If you shine a flashlight through a glass of KoolAid and then a glass of water with a little milk mixed in, which one(s) would you see the light beam going through the ...
... What are the 2 most basic categories of matter? 2. If you shine a flashlight through a glass of KoolAid and then a glass of water with a little milk mixed in, which one(s) would you see the light beam going through the ...
2: Chemistry Comes Alive: Objectives Part 1: Basic Chemistry
... 17. Explain the role of dehydration synthesis and hydrolysis in the formation and breakdown of organic molecules. 18. Describe the four levels of protein structure. 19. Indicate the function of molecular chaperones. 20. Describe enzyme action. 21. Compare and contrast DNA and RNA. 22. Explain the ro ...
... 17. Explain the role of dehydration synthesis and hydrolysis in the formation and breakdown of organic molecules. 18. Describe the four levels of protein structure. 19. Indicate the function of molecular chaperones. 20. Describe enzyme action. 21. Compare and contrast DNA and RNA. 22. Explain the ro ...
Chemical weapon
A chemical weapon (CW) is a munition that uses chemicals formulated to inflict death or harm on human beings. The Organisation for the Prohibition of Chemical Weapons (OPCW) states: The term chemical weapon may also be applied to any toxic chemical or its precursor that can cause death, injury, temporary incapacitation or sensory irritation through its chemical action. Munitions or other delivery devices designed to deliver chemical weapons, whether filled or unfilled, are also considered weapons themselves.They are classified as weapons of mass destruction (WMDs), though they are distinct from nuclear weapons, biological weapons (diseases), and radiological weapons (which use radioactive decay of elements). All may be used in warfare known by the military acronym NBC, for nuclear, biological, and chemical warfare. Weapons of mass destruction are distinct from conventional weapons, which are primarily effective due to their explosive, kinetic, or incendiary potential. Chemical weapons can be widely dispersed in gas, liquid and solid forms, and may easily afflict others than the intended targets. Nerve gas, tear gas and pepper spray are three modern examples.Lethal, unitary, chemical agents and munitions are extremely volatile and they constitute a class of hazardous chemical weapons that are now being stockpiled by many nations. (Unitary agents are effective on their own and require no mixing with other agents.) The most dangerous of these are nerve agents GA, GB, GD, and VX, and vesicant (blister) agents which are formulations of sulfur mustard such as H, HT, and HD. All are liquids at normal room temperature, but become gaseous when released. Widely used during the First World War, the effects of so-called mustard gas, phosgene gas and others caused lung searing, blindness, death and maiming.Pepper spray is of common use today. It is potentially lethal. There are no recent records of pepper spray being used in war, despite the fact that it inflicts fewer injuries and side-effects compared with impact and explosive weapons.Under the Chemical Weapons Convention (1993), there is a legally binding, world-wide ban on the production, stockpiling, and use of chemical weapons and their precursors. Notwithstanding, large stockpiles thereof continue to exist, usually justified as only a precaution against putative use by an aggressor.