Q&A Hero

Physic

Q: An oxygen atom can bond to ______________ other atom(s).
Q: ______________ is the study of the compounds and reactions that occur in living cells.
Q: Propene and cyclopropane are A) the same compound. B) isomers. C) neither isomers nor the same compound.
Q: Which of the following could be the formula of an alkyne? A) C6H6 B) C6H10 C) C6H12 D) C6H14
Q: Socrates died from ingesting the alkaloid named A) nicotine. B) caffeine. C) quinine. D) coniine.
Q: 1-Fluoropentane and 5-fluoropentane are A) isomers. B) neither isomers nor the same compound. C) the same compound.
Q: Addition polymers are formed from A) diacids only. B) alkenes. C) dialcohols only. D) diacids and dialcohols together.
Q: Molecules of which monomer could, by themselves, form a condensation polymer? A) HO"CH2"CH2"NH2 B) H2N"CH2"COOH C) HO"CH2"CH2"OH D) HOOC"COOH
Q: A functional group is A) exemplified by the R in ROH. B) a vertical column in the periodic table. C) exemplified by the COOH in RCOOH. D) a horizontal row in the periodic table.
Q: Which of the following could be the monomer of an addition polymer? A) CCl4 B) Cl2C=CH2 C) CHCl3 D) Cl3C=CCl3
Q: To which group of polymers does PVC belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: To which group of polymers does Teflon belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: To which group of polymers does polystyrene belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: To which group of polymers does Mylar belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: To which group of polymers does Dacron belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: To which group of polymers does nylon belong? A) Natural B) Hydrolytic C) Addition D) Condensation
Q: Which of the following polymers is a hydrocarbon? A) Polyethylene B) PVC C) Teflon D) Dacron
Q: Which of the following was the first synthetic compound to be made? A) Neoprene B) Polyethylene C) Bakelite D) Nylon
Q: Polymers are formed from fundamental repeating units called A) groups. B) amino acids. C) complexes. D) monomers.
Q: What is the molarity of a solution that contains 2 mol of solute in 4 L of solution?
Q: State which element is oxidized and which is reduced in the reaction Al + 3F22AlF3.
Q: State which element is oxidized and which is reduced in the reaction Fe + Cl2FeCl2.
Q: Complete and balance the equation: Zn + AgNO3(aq) ____________________
Q: Complete and balance the equation: Al + HCl ____________________
Q: Complete and balance the equation: Mg + HC2H3O2_____________________
Q: Complete and balance the following equations: a. HNO3+ Ba(OH)2____________________. b. H3PO4+ CaCO3_____________________.
Q: Complete and balance the equation: Ba(NO3)2(aq) + K2CO3(aq) ______________________
Q: Write the balanced chemical equation for the completecombustion of pentane, C5H12.
Q: Name four factors that influence the rate of chemical reactions.
Q: Each of the following general equations illustrates what basic type of chemical reaction? a. AB+ CDAD+ CB ______________ b. A+ BAB ______________ c. A+ BCAC+ B ______________ d. ABA+ B ______________
Q: Balance the chemical equation: Bi2S3+ O2Bi2O3+ SO2
Q: Balance the chemical equation: PCl5+ H2O H3PO4+ HCl
Q: Balance the chemical equation: Cu + Al2O3CuO + Al
Q: Balance the chemical equation: Al2S3+ H2O Al(OH)3+ H2S
Q: Balance the chemical equation: NO2+ H2O HNO3+ NO
Q: When an acid reacts with a carbonate or hydrogen carbonate, the products are water, carbon dioxide, and _______________.
Q: When an acid reacts with a carbonate or hydrogen carbonate, the products are ____________, carbon dioxide, and a salt.
Q: The number of moles of solute per liter of solution is called the ______________ of the solution.
Q: The molarity of a solution is the number of moles of solute per liter of ____________.
Q: The reaction Fe + CuSO4Cu + FeSO4is a(n) ________________-replacement reaction.
Q: A neutral aqueous solution has a pH of ______________.
Q: A solution with pH greater than 7 is classified as a(n) ______________.
Q: A solution of pH 5 is ______________ times as acidic as a solution of pH 6.
Q: When an atom or ion gives up electrons, it is said to be ______________.
Q: The loss of oxygen or gain of electrons by an atom or ion is called ______________.
Q: When an element is oxidized, it ______________ electrons.
Q: A reaction will occur when a piece of Mg is placed in aqueous Zn(NO3)2if Mg is ______________ Zn in the activity series.
Q: When an acid reacts with a base, the products are ______________ and a salt.
Q: When an acid reacts with a carbonate or hydrogen carbonate, the products are water, ______________, and a salt.
Q: The definitions of an acid and a base as substances that give H+and OH-ions, respectively, in water were proposed by the chemist named ______________.
Q: If two clear solutions are mixed and solid particles form, the particles are called a(n) ______________.
Q: The H3O+ion is called the ______________ ion.
Q: According to the Arrhenius theory, basic properties are caused by ______________ ions.
Q: An ionic compound formed from a cation other than H+and an anion other than OH-is called a(n) ______________.
Q: When aqueous solutions of Na2CO3and BaCl2are mixed, the products are NaCl and ______________.
Q: The formula for the hydronium ion is ______________.
Q: The human body contains thousands of catalysts called ______________.
Q: When energy is released in a chemical reaction, the reaction is called a(n) ______________ reaction.
Q: A substance that speeds up a chemical reaction but is not consumed is a(n) ______________.
Q: A reaction in which a substance reacts with oxygen, bursts into flame, and forms an oxide is called a(n) ______________ reaction.
Q: Most ______________ do their jobs by decreasing the activation energy for a reaction.
Q: The peculiar odor noticed close to electrical sparking is due to the chemical called ______________, which has the formula ______________.
Q: One mole of aluminum consists of ______________ aluminum atoms.
Q: When the equation Ca + H3PO4Ca3(PO4)2+ H2is balanced, the sum of all the coefficients (both written and "understood") is ______________.
Q: When the equation H2O + NO2NO + HNO3is balanced, the sum of all the coefficients (both written and "understood") is ______________.
Q: In chemical equations, numbers placed before formulas are known as ______________.
Q: When the forward and reverse reactions are proceeding at the same rate, the reaction is said to have reached ______________.
Q: 6.02 x 1023is known as ______________________.
Q: The substances formed in a chemical reaction are called the ______________.
Q: The original substances in a chemical reaction are called the ______________.
Q: Changes that alter the chemical composition of a substance are known as ______________ changes.
Q: Changes that do notalter the chemical composition of a substance are called ______________ changes.
Q: ______________ properties are those that do notdescribe the chemical reactivity of the substance.
Q: Which scientist first postulated the existence of ions? A) Lewis B) Dalton C) Arrhenius D) Berzelius
Q: When solutions of AgNO3 and CaCl2are mixed, which type of reaction is likely? A) Combination B) Double-replacement C) Decomposition D) Single-replacement
Q: Reacting an acid with a base gives water and A) a carbonate. B) ammonia. C) carbon dioxide. D) a salt.
Q: How many moles of He would 3.01 x 1023 helium atoms be?A) 2.00B) 4.00C) 0.50D) 1.00E) None of these
Q: How many atoms are in 1.00 mol of Mg?A) 24.3B) 6.02 x 1023C) 24.3 x 6.02 x 1023D) 24.3 x 1023
Q: How many atoms of oxygen are in 1.00 mol of sulfur dioxide, SO2?A) 64.1B) 64.1 x 6.02 x 1023C) 12.0 x 1023D) 6.02 x 1023
Q: How many molecules are in 1.00 mol of sulfur dioxide, SO2?A) 64.1B) 64.1 x 6.02 x 1023C) 12.0 x 1023D) 6.02 x 1023
1 2 3 … 244

Subjects

Accounting Anthropology Archaeology Art History Banking Biology & Life Science Business Business Communication Business Development Business Ethics Business Law Chemistry Communication Computer Science Counseling Criminal Law Curriculum & Instruction Design Earth Science Economic Education Engineering Finance History & Theory Humanities Human Resource International Business Investments & Securities Journalism Law Management Marketing Medicine Medicine & Health Science Nursing Philosophy Physic Psychology Real Estate Science Social Science Sociology Special Education Speech Visual Arts