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4. True False section circle one (1 pts each) A) T F 1 mole of atoms...
TRUE FALSE. Write T if the statement is true and 'F if the statem 46) The...
TRUE FALSE. Write T if the statement is true and 'F if the statem 46) The law of conservation of mass states that matter chemical reaction IF if the statement is false. states that matter cannot be gained or lost during a 40) 47) In electrolysis, electrical energy is used to drive a reaction to occur. By is used to drive a non-spontaneous oxidation-reduction 47) 70) During an oxidation-reduction reaction the oxidizing agent loses electron 149) The formula mass of...
31). 31) To convert a given number of moles into the number of atoms, one would...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water to prepare a 0.200 M solution. What is the volume of the resulting 0.200 M solution? Or asked another way, to what volume must the original solution be diluted? (3 points) 2) Lithium hydroxide, LiOH, is used in spacecraft to absorb the carbon dioxide exhaled by astronauts. Given 1.3 kg of LiOH, how many kg of CO2 can be absorbed? (10 Pts. The reaction...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
4. [16 pts|Answer by True or False and correct the wrong statements if any. T F...
4. [16 pts|Answer by True or False and correct the wrong statements if any. T F A. The main use of a buffer is to increase the pH value of a solution Correction, if any B. A buffer could not be made of HCl as the acid and Cr as the Correction, if any: conjugate base C. The equivalence point in acid-base titration is reached when the number of moles of the acid present equals the number of moles of...
please write legible 1. Identify each of the following reactions as a precipitation reaction, an acid-base...
please write legible
1. Identify each of the following reactions as a precipitation reaction, an acid-base reaction, or as a redox reaction + a. Pb(NO3)2 (aq) + 2 HCl(aq) PbCl (s) + 2 HNO, (aq) b. 2 Hxe + O2 + 2 H2O c. HNO, (aq) + KOH(aq) KNO, (aq) + H20 (1) d. Zna + 2HCl(a) - ZnClaraq) + Halle e. Ba?'(aq) + 2 Br(aq) + 2 Na(aq) + SO/"(aq) BaSO. (s) + 2 Na'(aq) + 2 Br" (aq)...
please write legible. answer all questions. 1. Identify each of the following reactions as a precipitation...
please write legible. answer all questions.
1. Identify each of the following reactions as a precipitation reaction, an acid-base reaction or as a redox reaction Pb(NO), (aq) + 2 HCl(aq) - PbCl(s) + 2 HNO(aq) b. 2 H2 + Oxel - 2 H2O CHNO, (aq) + KOH(aq) - KNO, (aq) + H2O (1) d. Zn + 2HCl - ZnCl + H e. Ba"(aq) + 2 Br(aq) + 2 Na' (aq) +SO. (aq) BaSO. (s) + 2 Na'(aq) + 2 Br"...
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H2...
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H20 (1) --> 2 H2SO4 (aq) ? 02 mol SO2 2 mol H2SO4 2 mol H2SO4 2 mol O2 0 1 mol O2 2 mol H20 O 2 mol O2 1 mol O2 2 mol H20 2 mol SO2 Question 1 1 pts What do the coefficients in a balanced equation tell us? Mark ALL that...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each)...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each) AE is independent on the initial and final state of a system. The sum of entropy changes of the system and surroundings is always positive. The ratio of numerical values of partial pressures of the reaction participants is unitless. Q is small if products pressures are small, a large Q means a negative or good (favorable) contribution to the free energy For pure solids...
23 43 Problem 6. (5 pts each) True or False (Circle one and state your seaon) If t) is a solution of the DE: "+(t-t)y+Ay- 5, then so is the f Reason: rue Fa b. Let f and g be two functions, such...
23 43 Problem 6. (5 pts each) True or False (Circle one and state your seaon) If t) is a solution of the DE: "+(t-t)y+Ay- 5, then so is the f Reason: rue Fa b. Let f and g be two functions, such that F(s)L0) and Go)-Li defined on (0, oo). If f(t) S 9(t) for allt 2 0, then F(o) S Glo) for als True F Reason: c. There exists a piecewise continuous and ex that LIf(0)]-3 exponential order...
TRUE FALSE. Write T if the statement is true and 'F if the statem 46) The law of conservation of mass states that matter chemical reaction IF if the statement is false. states that matter cannot be gained or lost during a 40) 47) In electrolysis, electrical energy is used to drive a reaction to occur. By is used to drive a non-spontaneous oxidation-reduction 47) 70) During an oxidation-reduction reaction the oxidizing agent loses electron 149) The formula mass of...
31). 31) To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? A) 1.66 x 10-24 atoms/1 mol B) 1 mol/6.022 x 1023 atoms C) molar mass D) 6.022 x 1023 atoms/1 mol E) 1 mol/1.66 x 10-24 atoms 32) 32) How many atoms of sulfur are present in a 155 g sample of sulfur? [Molar mass: S, 32.06 g/mol] A) 6.02 x 1023 atoms B) 2.91 x 1023...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water to prepare a 0.200 M solution. What is the volume of the resulting 0.200 M solution? Or asked another way, to what volume must the original solution be diluted? (3 points) 2) Lithium hydroxide, LiOH, is used in spacecraft to absorb the carbon dioxide exhaled by astronauts. Given 1.3 kg of LiOH, how many kg of CO2 can be absorbed? (10 Pts. The reaction...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
4. [16 pts|Answer by True or False and correct the wrong statements if any. T F A. The main use of a buffer is to increase the pH value of a solution Correction, if any B. A buffer could not be made of HCl as the acid and Cr as the Correction, if any: conjugate base C. The equivalence point in acid-base titration is reached when the number of moles of the acid present equals the number of moles of...
please write legible
1. Identify each of the following reactions as a precipitation reaction, an acid-base reaction, or as a redox reaction + a. Pb(NO3)2 (aq) + 2 HCl(aq) PbCl (s) + 2 HNO, (aq) b. 2 Hxe + O2 + 2 H2O c. HNO, (aq) + KOH(aq) KNO, (aq) + H20 (1) d. Zna + 2HCl(a) - ZnClaraq) + Halle e. Ba?'(aq) + 2 Br(aq) + 2 Na(aq) + SO/"(aq) BaSO. (s) + 2 Na'(aq) + 2 Br" (aq)...
please write legible. answer all questions.
1. Identify each of the following reactions as a precipitation reaction, an acid-base reaction or as a redox reaction Pb(NO), (aq) + 2 HCl(aq) - PbCl(s) + 2 HNO(aq) b. 2 H2 + Oxel - 2 H2O CHNO, (aq) + KOH(aq) - KNO, (aq) + H2O (1) d. Zn + 2HCl - ZnCl + H e. Ba"(aq) + 2 Br(aq) + 2 Na' (aq) +SO. (aq) BaSO. (s) + 2 Na'(aq) + 2 Br"...
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H20 (1) --> 2 H2SO4 (aq) ? 02 mol SO2 2 mol H2SO4 2 mol H2SO4 2 mol O2 0 1 mol O2 2 mol H20 O 2 mol O2 1 mol O2 2 mol H20 2 mol SO2 Question 1 1 pts What do the coefficients in a balanced equation tell us? Mark ALL that...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each) AE is independent on the initial and final state of a system. The sum of entropy changes of the system and surroundings is always positive. The ratio of numerical values of partial pressures of the reaction participants is unitless. Q is small if products pressures are small, a large Q means a negative or good (favorable) contribution to the free energy For pure solids...
23 43 Problem 6. (5 pts each) True or False (Circle one and state your seaon) If t) is a solution of the DE: "+(t-t)y+Ay- 5, then so is the f Reason: rue Fa b. Let f and g be two functions, such that F(s)L0) and Go)-Li defined on (0, oo). If f(t) S 9(t) for allt 2 0, then F(o) S Glo) for als True F Reason: c. There exists a piecewise continuous and ex that LIf(0)]-3 exponential order...
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