Chemistry Notes with Blanks
... The combination of carbon and water contains the same _________ as sugar. Elements: can’t be broken into _________ substances (atoms.) (Carbon is an element) Sugar + water…would you drink this? Ash + water…would you drink this? Why? They contain the same elements don’t they? Why don’t you get sugar ...
... The combination of carbon and water contains the same _________ as sugar. Elements: can’t be broken into _________ substances (atoms.) (Carbon is an element) Sugar + water…would you drink this? Ash + water…would you drink this? Why? They contain the same elements don’t they? Why don’t you get sugar ...
CH30S Chemical Reactions Part 2 Unit Review
... 25. Calculate the volume of ammonia gas that could be produced from 9.5L of hydrogen gas and and excess of nitrogen gas. Assume STP conditions. (6.27L NH3) 26. Given 160.5g of sulphur and 8.4 mol of oxygen gas, calculate the mass of SO3 that will be produced in a synthesis reaction. Hint: think Limi ...
... 25. Calculate the volume of ammonia gas that could be produced from 9.5L of hydrogen gas and and excess of nitrogen gas. Assume STP conditions. (6.27L NH3) 26. Given 160.5g of sulphur and 8.4 mol of oxygen gas, calculate the mass of SO3 that will be produced in a synthesis reaction. Hint: think Limi ...
educator exam series
... Mathematical tables and electronic calculations may be used All working MUST be clearly shown where necessary For examiner’s use only: Questions Max. score Candidates score ...
... Mathematical tables and electronic calculations may be used All working MUST be clearly shown where necessary For examiner’s use only: Questions Max. score Candidates score ...
Name__________________________ Period_______ Word
... Write a balanced chemical equation to represent each of the following chemical reactions. Replace the appropriate reaction conditions in the equation. (Don’t forget your diatomic molecules) 1. Iron (solid) + sulfur (solid) when heated → iron (II) sulfide (solid) ...
... Write a balanced chemical equation to represent each of the following chemical reactions. Replace the appropriate reaction conditions in the equation. (Don’t forget your diatomic molecules) 1. Iron (solid) + sulfur (solid) when heated → iron (II) sulfide (solid) ...
chemical basis
... cellulose. When indigo is reduced, the C =O group are converted to C-OH groups which form H-bonds with cellulose, thus attaching to the fabric. The reduced leuco-indigo molecule is yellowish, but when the fabric dyed with it is exposed to air and light, the leuco-indigo is oxidized to purple indigo ...
... cellulose. When indigo is reduced, the C =O group are converted to C-OH groups which form H-bonds with cellulose, thus attaching to the fabric. The reduced leuco-indigo molecule is yellowish, but when the fabric dyed with it is exposed to air and light, the leuco-indigo is oxidized to purple indigo ...
FIREWORKS EMC summary notes
... In a chemical reaction a new substance is always formed. Most chemical changes are not easily reversed; they are irreversible. In a physical change no new substance is formed. Melting and evaporation are examples of physical changes. Physical changes are usually reversible. You can tell that a react ...
... In a chemical reaction a new substance is always formed. Most chemical changes are not easily reversed; they are irreversible. In a physical change no new substance is formed. Melting and evaporation are examples of physical changes. Physical changes are usually reversible. You can tell that a react ...
CHEMISTRY
... 2. Why do atoms form bonds? a. To change from a gaseous state b. To become more stable c. To build larger molecules d. To gather more electrons ...
... 2. Why do atoms form bonds? a. To change from a gaseous state b. To become more stable c. To build larger molecules d. To gather more electrons ...
SNC2D – Science 10 Tuesday April 26th, 2010 Mr. Sourlis and Mr
... 3. When a chemical reaction takes place, the total mass of the products is always a. Greater than the total mass of the reactants b. Less than the total mass of the reactants c. Equal to the total mass of the reactants d. Dependent on the type of reaction e. Impossible to determine 4. What is anothe ...
... 3. When a chemical reaction takes place, the total mass of the products is always a. Greater than the total mass of the reactants b. Less than the total mass of the reactants c. Equal to the total mass of the reactants d. Dependent on the type of reaction e. Impossible to determine 4. What is anothe ...
Nature of Atoms Atomic Structure Atomic number Atomic mass
... ◦ Any substance that dissociates in water to increase the [H+] (and lower the pH) ◦ The stronger an acid is, the more hydrogen ions it produces and the lower its pH ...
... ◦ Any substance that dissociates in water to increase the [H+] (and lower the pH) ◦ The stronger an acid is, the more hydrogen ions it produces and the lower its pH ...
Chem 150 - Fall 2015 Exam I
... Element symbols and names: symbols, names, and spellings are recommended by IUPAC (http://www.iupac.org/). Names are not yet proposed for the elements beyond 111 - those used here are IUPAC’s temporary systematic names (Pure & Appl. Chem., 1979, 51, 381–384). In the USA and some other countries, the ...
... Element symbols and names: symbols, names, and spellings are recommended by IUPAC (http://www.iupac.org/). Names are not yet proposed for the elements beyond 111 - those used here are IUPAC’s temporary systematic names (Pure & Appl. Chem., 1979, 51, 381–384). In the USA and some other countries, the ...
Chem 152 Chapter 4
... • A sample of an element contains only one type of atom. • There are over 100 known elements. ...
... • A sample of an element contains only one type of atom. • There are over 100 known elements. ...
Nature of Atoms Atomic Structure
... – Releasing hydrogen ions when a base is added – Absorbing hydrogen ions when acid is added ...
... – Releasing hydrogen ions when a base is added – Absorbing hydrogen ions when acid is added ...
PUC Schools - cloudfront.net
... 27. (7.c) When water changes phase from liquid to gas, the process is a) Exothermic b) Endothermic c) Neutral d) Kinetic 28. (7.c) The temperature of iced water melting is _____ oC. The temperature of boiling water is _____ oC. a) 100, 200 b) 0, 100 c) 100, 0 d) None 29. (7.b) If in a chemical react ...
... 27. (7.c) When water changes phase from liquid to gas, the process is a) Exothermic b) Endothermic c) Neutral d) Kinetic 28. (7.c) The temperature of iced water melting is _____ oC. The temperature of boiling water is _____ oC. a) 100, 200 b) 0, 100 c) 100, 0 d) None 29. (7.b) If in a chemical react ...
sch3u unit 1 test: matter
... 9. When fluorine forms an ionic bond it tends to a. lose electrons b. gain electrons c. share electrons d. lose protons 10. Copper (II) hydroxide is composed of a. 2 elements, 2 atoms b. 2 elements, 3 atoms c. 3 elements, 4 atoms d. 3 elements, 5 atoms ...
... 9. When fluorine forms an ionic bond it tends to a. lose electrons b. gain electrons c. share electrons d. lose protons 10. Copper (II) hydroxide is composed of a. 2 elements, 2 atoms b. 2 elements, 3 atoms c. 3 elements, 4 atoms d. 3 elements, 5 atoms ...
Practice questions
... The average atomic mass of Eu is 151.96 amu. There are only two naturally occurring isotopes of europium, 151Eu with a mass of 151.0 amu and 153Eu with a mass of 153.0 amu. The natural abundance of the 131Eu isotope must be approximately a) ...
... The average atomic mass of Eu is 151.96 amu. There are only two naturally occurring isotopes of europium, 151Eu with a mass of 151.0 amu and 153Eu with a mass of 153.0 amu. The natural abundance of the 131Eu isotope must be approximately a) ...
Water splitting
Water splitting is the general term for a chemical reaction in which water is separated into oxygen and hydrogen. Efficient and economical water splitting would be a key technology component of a hydrogen economy. Various techniques for water splitting have been issued in water splitting patents in the United States. In photosynthesis, water splitting donates electrons to power the electron transport chain in photosystem II.