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Which of the following represents an acid-base neutralization reaction?
1. $AgCl + Na rarr NaCl + Ag$
2. $CH_3COOH + CH_3CH_2OH rarr CH_3COOCH_3CH_2 + H_2O$
3. $2H_3PO_4 + 6LiOH rarr 2Li_3PO_4 + 6H_2O$
4. None of the above
An enzyme speeds up a reaction by                               .
1. absorbing energy
2. lowering the activation energy
3. raising the activation energy
4. releasing energy
Of what are nucleic acids made?
1. Sugars
2. Fatty acids
3. Nucleotides
4. Amino Acids
Grade 10 Periodic Table and Elements
Grade 10 Periodic Table and Elements
Which of the following statements can be used to describe an element correctly?
1. a pure substance
2. matter of one type of atom
3. can be broken down
4. all of the above
5. only a and c
Grade 10 Periodic Table and Elements
What is the correct name for the compound $MgO$?
1. magnesium trioxide
2. dimagnesium trioxide
3. magnesium oxide
4. magnesium oxygen
Grade 10 Periodic Table and Elements
Sodium, mercury, argon, and neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of neon and argon than for mercury and sodium. Which of the following best describes the elements within the group of the Periodic Table that contains neon and argon gas?
1. Gaseous at room temperature and highly reactive with metals
2. Solid at room temperature and mildly reactive with strong acids
3. Gaseous at room temperature and mostly unreactive with metals
4. Solid at room temperature and mostly unreactive with strong acids
Grade 10 Periodic Table and Elements
What are U.S. coins made of?
1. Gold
2. Alloy
3. Silver
4. Titanium
What type of macromolecules are the enzymes found in our bodies?
1. lipids
2. carbohydrates
3. proteins
4. nucleic acids
What type of chemical reaction is $P + O -> PO$?