Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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15.00 g of naoh were added to 185.00 g of water. 1. what is the % m/m? …
1. \(1 = P\) (15.00g NaOH), \(3 = G\) (200.00g soln), \(2 = M\) (7.500% m/m) 2. \(4 = P\) (15.00g NaOH), \(5 = R\) (444.44g soln), \(7 = G\) (200.00g soln), \(6 = X\) (33.33g NaOH)
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two miscible liquids were mixed to the point of saturation. it was foun…
1. \(1 = 25.00\), \(2 = 7.143\), \(3 = 350.00\) 2. \(4 = 25.00\), \(5 = 25.00\), \(6 = 1.786\), \(7 = 350.00\)
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two miscible liquids were mixed to the point of saturation. it was foun…
1. \(1 = 25.00\), \(2=7.143\), \(3 = 350.00\) 2. \(4 = 25.00\), \(5=25.00\), \(6\approx1.786\), \(7 = 350.00\) (where \(1.786\) is from \(\frac{25.00\times25.00}{350.00}\approx1.7…
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a saturated solution of a salt was made by adding 36.00 g to 150.0 g wa…
1. C. \(31.00\) 2. C. \(31.00\) 3. T. \(20.67\) 4. D. \(150.0\)
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100.0 ml of hcl required 5.831 g mg(oh)₂ to titrate. the molar mass of …
1. \(1\) 2. \(0.1\) (since \(\frac{5.831}{58.31} = 0.1\)) 3. \(58.31\) 4. \(2\) 5. \(0.1\) 6. \(0.2\) (since \(0.1\times2\)) 7. \(1\) 8. \(0.2\) 9. \(2.000\) (since \(\frac{0.2\sp…
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100.0 ml of hcl required 25.00 ml of 0.2000 m mg(oh)₂ to reach ph 7. wh…
1. K. \(0.005000\) 2. H. \(0.02500\) 3. K. \(0.005000\) 4. P. \(0.01000\) 5. K. \(0.005000\) 6. P. \(0.01000\) 7. J. \(1.000\) 8. P. \(0.01000\) 9. M. \(0.1000\) 10. L. \(100.0\)
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question 4 (3 points) how would you make 5.00 l of a 2.00 m solution of…
1. C. \(2.00\) 2. G. \(5.00\) 3. L. \(10.00\) 4. I. \(58.44\space g/mol\) 5. J. \(58.44\) 6. L. \(10.00\) 7. M. \(584.4\)
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question 2 (2 points) how many grans in 3.0 l of a 2.00 m solution of s…
1. E. \(2.00\space mol/L\) 2. C. \(2.00\) 3. D. \(3.00\) 4. H. \(6.00\) 5. I. \(58.44\space g/mol\) 6. J. \(58.44\) 7. H. \(6.00\) 8. K. \(351\)
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question 1 (2 points) how many moles in 3.0 l of a 2.00 m solution of s…
1. E. \(2.00\space mol/L\) 2. C. \(2.00\) 3. D. \(3.00\) 4. H. \(6.00\)
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question 1 (2 points) how many moles in 3.0 l of a 2.00 m solution of s…
C. 6.00
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how many calories are required to heat 100.0 g of water from -15.0 °c t…
1. A. use 2. A. use 3. A. use 4. A. use 5. A. use
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question 3 (3 points) indicate which molecule, a or b, has the stronges…
Question 3: 1. B 2. B 3. B 4. A Question 4: 1. B 2. B 3. B 4. A
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question 2 (2 points) indicate the type of solid in each example lattic…
1. A. true 2. B. false 3. A. true 4. A. true 5. B. false 6. D. crystalline 7. C. amorphous
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question 1 (2 points) match the process with the name __1__ solid into …
1. A. melting 2. F. vaporization 3. E. condensation 4. D. sublimation 5. C. deposition
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(b) the diagram below represents a jiko when in use.study it and answer…
i. I. \(C + O_{2}\xrightarrow{\text{heat}}CO_{2}\) II. \(CO_{2}+C\xrightarrow{\text{heat}}2CO\) ii. Carbon - monoxide burns (reacts with oxygen) to form carbon dioxide. The reacti…
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what is the concentration in m when 100. g of nacl is made to a final v…
1: K, 2: J, 3: K, 4: I, 5: K, 6: L, 7: C
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question 4 (2 points) how many l of a 2.00 m nacl solution are need to …
1. \(K\) (for \(1.71\) in moles calculation) 2. \(J\) (for \(100. g\) in mass value) 3. \(K\) (result of moles calculation) 4. \(I\) (for \(58.44g\) in molar - mass value) 5. \(L\…
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question 3 (2 points) ✓ saved how many grams of nacl are there in 2.00 …
1. \(E\) 2. \(C\) 3. \(E\) 4. \(B\) 5. \(I\) 6. \(E\) 7. \(H\) 8. \(B\)
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question 3 (2 points) how many grams of nacl are there in 2.00 l of a 2…
1. \(4\) (from \(2.00\times2.00\)), 2. \(2\), 3. \(4\), 4. \(1\), 5. \(58.44\), 6. \(4\), 7. \(234\) (from \(4\times58.44 = 233.76\approx234\)), 8. \(1\)
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question 2 (2 points) how many liters of a 2.00 m solution are needed t…
1. C. 2 2. E. 4 3. E. 4 4. E. 4
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question 1 (2 points) how many moles of solute in 2.00 l of a 3.00 m so…
1. D. 3 2. C. 2 3. G. 6 4. B. 1
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question 1 (2 points) how many moles of solute in 2.00 l of a 3.00 m so…
1. \(3.00\) 2. \(2.00\) 3. \(6.00\) 4. \(1\) The final answer for the number of moles (blank 3) is \(G.6\)
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how many ml of a 5.00 m solution are needed to make 500. ml of a 0.0050…
A. \(0.0250\space mL\)
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how many ml of a 5.00 m solution are needed to make 500. ml of a 0.0050…
A. \(0.0250\space mL\) (Note: There is a calculation error in the problem - solving process. Using the correct dilution formula \(C_1V_1 = C_2V_2\), the correct volume should be \…
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question 3 (2 points) what is the concentration of a 5.00 m solution af…
A. \(0.500\space M\)
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how many l of a 5.00 m solution are needed to make 2.00 l of a 1.00 m s…
1. \(K\) (since \(V_d = 2.00\) L) 2. \(L\) (since \(C_d=1.00\) M) 3. \(H\) (since \(C_c = 5.00\) M) 4. \(A\) (because we use \(C_d\) in the formula \(V_c=\frac{C_dV_d}{C_c}\)) 5. …
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10.0 ml of a 5.00 m solution was added to 90.0 ml of water. what is the…
1. \(E\) (10.0) 2. \(G\) (100.0) 3. \(H\) (5.00) 4. \(V_c\) (\(D\)) 5. \(H\) (5.00) 6. \(E\) (10.0) 7. \(M\) (0.500) 8. \(V_d\) (\(C\)) 9. \(G\) (100.0) 10. \(Q\) (1:10)
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question 5 (2 points) the total pressure in a container is 25.0 atm. it…
1. E. partial pressure 2. \(P_i = X_iP_{total}\) (or conceptually related to \(P_{total}=P_1 + P_2+\cdots\) as we are finding one of the \(P_i\) values) 3. X. 1.25
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question 4 (2 points) what is the density of chlorine gas at stp? the m…
1. C 2. G
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question 3 (2 points) how many moles of oxygen are in 100. l at 1.00 at…
1. H. \(PV = nRT\) 2. F. \(1\ mol=22.4\ L\)
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question 2 (2 points) what is the temperature of 2.00 moles of oxygen i…
1. B. change in conditions 2. I. \(P_2V_2/n_2T_2 = P_1V_1/n_1T_1\) 3. S. \(n_2\) 4. O. \(V_1\) 5. L. \(P_1\) 6. V. \(T_1\) 7. M. \(P_2\) 8. P. \(V_2\) 9. A. missing variable
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question 1 (2 points) what is the temperature of 2.00 moles of oxygen i…
1. A. missing variable 2. H. \(PV = nRT\) 3. U. \(T\)
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question 3 (2 points) in order to have a large partial positive charge …
Question 3: 1. A. F - H, O - H, or N - H bond 2. B. F, O, or N Question 4: 1. C. hydrogen bond 2. C. hydrogen bond 3. D. ion to dipole 4. B. dipolar 5. A. London's
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question 2 (2 points) indicate the strongest attraction between the two…
1. A. London's 2. B. dipolar (dipole - induced dipole) 3. (not in the given options, but ion - induced dipole) 4. B. dipolar (dipole - dipole) 5. D. ion - dipole 6. C. hydrogen bo…
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question 2 (2 points) indicate the strongest attraction between the two…
D. ion - dipole
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question 1 (2 points) true or false. __1__ a molecule with a single pol…
1. A. True 2. A. True 3. A. True 4. A. True 5. A. True
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answer the questions about the balanced reaction. 3a + 2b → 1c + 100. c…
1. \(1\) 2. \(N\) ( \(0.143\) ) 3. \(L\) ( \(70\) ) 4. \(M\) ( \(100\) ) 5. \(N\) ( \(0.143\) ) 6. \(O\) ( \(14.3\) ) 7. \(B\) ( \(1\) ) 8. \(T\) ( \(yes\) )
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question 1 (2 points) answer the questions about the balanced reaction …
1. D. 3 2. \(3\) 3. B. 1 4. I. 10 5. D. 3 6. K. 30 7. B. 1 8. T. yes
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question 4 (3 points) answer the questions about the balanced reaction …
1. D. 3 2. G. 6 3. I. yes
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question 2 (2 points) answer the questions about the balanced reaction …
**Question 2** - How many moles of B are required to make 1 mole of C? C. 2 - How many moles of B are required to make 2 moles of C? E. 4 - Is the relationship between moles of A …
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question 1 (2 points) answer the questions about the balanced reaction …
For the first blank: D. 3 For the second blank: G. 6 For the third blank: I. yes
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question 10 (1 point) the concentration of a solution was 0.100 m after…
B. 2.500
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question 9 (1 point) what is the concentration after a 1:25 dilution of…
1. \(1\) 2. \(0.200\) 3. \(25.0\) (corresponds to \(V_D\) in the formula \(\frac{V_C}{V_D}\)) 4. \(X\) (since \(C_D = 0.200\space M\) which is option \(X\))
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1. how many ml of 3.00 m nacl solution are needed to make 4.00 l of a 2…
1. \(V_{C} = 2.67\times 10^{3}\space mL\) (corresponds to \(V_{C}\) calculation). 2. If using \(\text{dilution}=\frac{C_{D}}{C_{C}}\), the answer is W. \(0.6667\).
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1. how many ml of water are required to dilute 2.00 ml of a 5.00 m nacl…
1. - 1: \(C_C\) - 2: \(5.00\) - 3: \(10.00\) - 4: \(10.00\) - 5: \(2.00\) - 6: \(8.00\) 2. - 7: \(10.00\) - 8: \(5\) - 9: \(V_D\) - 10: \(2.00\)
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what is the concentration after 3.000 ml of a 3.000 m nacl solution is …
1. L (50.00) 2. CC ($C_C$) 3. A (3.000) 4. FF ($V_D$) 5. L (50.00) 6. A (3.000) 7. 16.67 (but from options and formula structure: using $\frac{V_D}{V_C}$, so with $V_D = 50.00$ (L…
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what is the concentration after 3.000 ml of a 3.000 m nacl solution is …
1. \(V_D = 50.00\space mL\) (L), \(C_CV_C\) (\(CC\times EE\)), \(V_C = 3.000\space mL\) (A), \(V_D\) (FF), \(V_D=50.00\space mL\) (L) 2. \(V_C = 3.000\space mL\) (A), \(V_D = 50.0…
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how many ml of 3.000 m naoh solution are needed to react with 2.000 g h…
1. N. \(0.02041\) 2. A. \(3.000\) 3. N. \(0.02041\) 4. R. \(0.06124\) 5. R. \(0.06124\) 6. I. \(0.02041\) 7. A. \(3.000\) 8. \(1000\) (not in options, but unit - conversion factor…
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how many ml of 3.000 m mg(oh)₂ solution are needed to react with 2.000 …
1. G. \(6.000\) 2. A. \(3.000\) 3. G. \(6.000\) 4. F. \(9.000\) 5. E. \(2.000\) 6. F. \(9.000\) 7. A. \(3.000\) 8. A. \(3.000\) 9. C. \(10.00\) 10. A. \(3.000\)
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how many grams of mg₃(po₄)₂ are in 10.00 ml of a 2.500 m solution? the …
1. D. \(1.000\) 2. EE. \(0.01000\) 3. AA. \(10^{3}\) 4. B. \(2.500\) 5. S. \(262.87\) 6. EE. \(0.01000\) 7. I. \(0.02500\) 8. D. \(1.000\) 9. I. \(0.02500\)
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question 2 (1 point) briefly explain how you would make the above 2.500…
1st: A. weigh out 1971 g 2nd: C. dissolve 3rd: B. place meniscus at the 3.000 L mark 4th: D. stir to make homogeneous
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how many grams of mg3(po4)2 are needed to make 3.000 l of a 2.500 m sol…
1. B. 2.500 2. A. 3.000 3. V. 7.500 4. D. 1.000 5. S. 262.87 6. V. 7.500 7. DD. 1971 8. D. 1.000
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question 9 (1 point) give the type of crystal and the type of lattice p…
1. A. molecules 2. B. molecular 3. E. atoms 4. (metallic, but closest in the given options is F. atomic as metallic crystals have atoms as lattice - points in a sense similar to a…
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question 8 (1 point) use kinetic theory, t = ke = ½ m v², to answer the…
1. A. A 2. C. yes
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question 7 (1 point) the boiling point of ethanol is 78 ^ { circ } c, a…
1. C. can't tell from this information 2. C. can't tell from this information 3. C. can't tell from this information 4. B. acetone
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question 6 (1 point) the boiling point of ethanol is 78 °c, and that fo…
1. A. ethanol 2. C. can't tell from this information 3. A. ethanol 4. C. can't tell from this information
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how many calories are required to heat 5.00 g of ice at -25.0 ^ { circ …
1. \(L\) 2. \(AA\) 3. \(M\) 4. \(L\) 5. \(R\) 6. \(U\) 7. \(C\) 8. \(M\) 9. \(V\) 10. \(O\)
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how many cal need to be removed to condense 50.0 g of steam at 150.0 °c…
1. I. \(50.0^{\circ}C\) 2. G. \(100.0^{\circ}C\) 3. J. \(96.0^{\circ}C\) 4. I. \(50.0^{\circ}C\) 5. Q. \(1243\) 6. T. \(26950\) 7. J. \(96.0^{\circ}C\) 8. S. \(4795\) 9. W. \(3298…
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on the graph in problem 3, the letter corresponding the part of the cur…
1. B 2. F
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draw the heating/cooling curve for o₂. label both axes. get the melting…
1. H. heat or energy 2. I. degrees K 3. D. two 4. A. melting point 5. B. boiling point 6. K. \(54.8\) 7. J. \(90.2\)
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question 1 (2 points) define sublimation __1__ define deposition __2__ …
1. E. transitioning from the solid to the vapor 2. C. transitioning from the vapor to the solid
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read the passage from sugar changed the world. we all crave sweetness, …
Sugar cane is no longer the main source of sweetness for most people.
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read the passage from sugar changed the world. no one could have seen i…
Advances in the production of sweeteners hastened the end of involuntary servitude.
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question 9 of 10 read these lines: as for her battles (should you wish …
A. abacc
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question 4 of 5 read these lines from \the monks tale.\ for hercules, a…
D. abab
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question 1 of 10 read this poem: roses are red, violets are blue, excep…
C. abcc
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question 7 of 10 which description is an example of direct characteriza…
B. Steve was the strongest wrestler on the team, yet he was several inches shorter than his opponents.
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a combination reaction is also known as a synthesis reaction. a true b …
A. TRUE
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is ( ch_{4}+2o_{2}\to co_{2}+2h_{2}o ) a combination reaction? a yes b …
B. No
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two compounds reacting to form another compound can qualify as a combin…
TRUE
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what is the product of this combination reaction, keeping in mind that …
A. \(2AlCl_{3}\)
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two or more chemical species combine to form a more complex product in …
A. TRUE
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which of the following is the balanced equation for the synthesis of su…
A. \(SO_{3}+H_{2}O ightarrow H_{2}SO_{4}\)
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which of the following chemical reactions produces water via a synthesi…
A. \(2H_2 + O_2 ightarrow2H_2O\)
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choose the product of the following reaction: mg + h₂o → __. a mg₄oh b …
C. \(Mg(OH)_2\)
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s + o₂ → so₂ the reaction above is classified as _. a combustion reacti…
A. Combustion Reaction
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reactions in which two or more substances combine to form a new substan…
combination
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caco₃ → cao + co₂ the reaction above is classified as a decomposition b…
a. decomposition
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decomposition reactions form: a simpler compounds from a complex compou…
A. Simpler compounds from a complex compound
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what energy can be used for a decomposition reaction to take place? sel…
A. Electricity, B. Heat, D. Light
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according to the description below: \calcium carbonate is heated to bre…
E. Decomposition
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2hgo→2hg + o₂ the reaction above is classified as a double displacement…
e. decomposition
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read a second text about chocolate. in the harry potter series, chocola…
- The effect of chocolate on a person's mood is short - lived. - Emotions associated with the taste of chocolate are responsible for lifting a person's mood. - Chocolate can impro…
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caco₃ → cao + co₂ the reaction above is classified as a synthesis b dou…
C. decomposition
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a reaction is a reaction where a substance breaks down to form two or m…
Decomposition
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read a text about fireworks. fireworks operators usually fall into one …
Stunning visual effects are possible with fireworks. Some people like loud fireworks.
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compare the details that were included in both texts. some fertilizers …
both authors
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mental image or representation that we use to understand our social env…
social schema
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theoretical model that posits two channels by which persuasive appeals …
elaboration likelihood model (ELM)
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question decide whether the lewis structure proposed for each molecule …
- For \(ClF_3\): No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: \(Cl\), \(F\) - For \(PO_4^{3 -}\): No, some atoms have the w…
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look at this sentence: the hunters identified traces of the deer in the…
1. tracks or other signs left behind by the passing of a person or animal.
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early movies had no sound, so audiences watched in silence. then, theat…
C. Audiences watched early movies in silence because the movies had no sound.
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vocabulary review a. odd one out choose the word or phrase that does no…
## Part A: 1. c) vinegar 2. d) nutrient 3. b) conventional 4. d) exposure 5. c) authentic 6. d) costly ## Part B: 1. nutritional 2. Conventional 3. certification 4. inhumane 5. ov…
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extension. identify whether the following compounds are ionic or covale…
- \(MgCl_2\): Ionic. Lewis structure: \(Mg^{2+}[\colon\ddot{Cl}\colon]^{-}[\colon\ddot{Cl}\colon]^{-}\) - \(NH_3\): Covalent. Lewis structure: \(\ce{H-\underset{H}{\overset{H}{\un…
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vocabulary review a. odd one out choose the word or phrase that does no…
A. 1. c) vinegar 2. d) nutrient 3. b) conventional 4. d) exposure 5. c) authentic 6. d) costly B. 1. nutritional 2. Conventional 3. certification 4. inhumane 5. oversees 6. conven…
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3. the formula for calcium oxide is a ca₂o₂ b cao₂ c ca₂o d cao 4. the …
3. D. \(CaO\) 4. B. \(Mg(OH)_2\)
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vocabulary review a. odd one out choose the word or phrase that does no…
A. 1. c) vinegar 2. d) nutrient 3. b) conventional 4. d) exposure 5. c) authentic 6. d) costly B. 1. nutritional 2. Pesticide 3. certification 4. inhumane 5. oversees 6. conventio…
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4. the formula for magnesium hydroxide is a mgoh b mg(oh)₂ c mg₂oh d mg…
B. \(Mg(OH)_{2}\)
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4. the formula for magnesium hydroxide is a mgoh b mg(oh)₂ c mg₂oh d mg…
B. \(Mg(OH)_2\)
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4. the formula for magnesium hydroxide is a mgoh b mg(oh)₂ c mg₂oh d mg…
B. \(Mg(OH)_{2}\)