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i need help with 2,4,5,8,9,10-12
6 pts Question 2 A student designs an experiment to test...
i need help with 1-6 i need help with questions 1-6 Question 1 8 pts Choose...
i need help with 1-6
i need help with questions 1-6
Question 1 8 pts Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A element [Select) > b) [Select) c) [Select) d) C10HSCIN2 (Select) Question 1 Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A eleme [Select] S...
i need help with questions 4, 5, 13, 15, 16 6 pts Question 4 Perform each...
i
need help with questions
4, 5, 13, 15, 16
6 pts Question 4 Perform each of the following calculations of the measured numbers and express your answer rounded to the appropriate number of significant figures. Only type the number for the final answer in the box (no units). a) 67.50 mL - 35.50 mL mL b) 5.35 cm x 10.00 cm x 0.50 cm = cm Question 5 4 pts A scientist defines a new unit, the mini-meter, which...
need help ASAP Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
In my organic chemistry lab we are performing a gas chromatography experiment and I need help...
In my organic chemistry lab we are performing a gas
chromatography experiment and I need help with our prelab
assignment, thanks!
Question 3 1 pts If compound A elutes (comes off) a GC column earlier than compound B in a temperature gradient GC run. What can be inferred about their respective boiling points? Compound A probably has a lower boiling point than that of compound B. Compound A and B have the same boiling point. Elution time does not correlate...
Question 4 2 pts During this week's experiment, a student was provided with a stock solution...
Question 4 2 pts During this week's experiment, a student was provided with a stock solution of FD&C Red 40 dye that was 0.381 mM. Following the procedure in the lab manual, she created Solution #2 by pipetting 19 mL of Solution #1 to a 25 mL volumetric flask, then diluted to the calibration line with Dl water. What is the concentration of Solution #2 in mM? Note: The units of mM are used for grading purposes, and are not...
5. Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) →...
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
2 pts Question 12 You have the six pieces of metal listed below, plus a beaker...
2 pts Question 12 You have the six pieces of metal listed below, plus a beaker of water containing 300 g of water. The water temperature is 21.0 °C and its specific heat is 4.184 J/g.°C. Metal Specific heat (J/g.°c) Mass (g) 1. AI 0.9002 100.0 2. AI 0.9002 50.0 3. Au 0.1289 100.0 4. Au 0.1289 50.0 5. Zn 0.3860 100.0 6. Zn 0.3860 50.0 In an experiment, you are asked to select one piece of metal and heat...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in water, 2.31 kJ of energy is absorbed. Is the enthalpy of dissolution of NaCl exothermic or endothermic? Endothermic Exothermic Question 2 0.5 pts What is the balanced thermochemical equation for the combustion of two moles of gaseous acetylene, C2H2, with oxygen to produce carbon dioxide and water vapor at 24.59°C given that 2512 kJ of heat is released at a constant pressure of 1.14...
looking for question 5, 6 7 and 8 5. In reaction 1, a student measured the...
looking for question 5, 6 7 and 8
5. In reaction 1, a student measured the temperature of the resultant solution when some NaOH pellets were still left in the calorimeter. How does it affect the value of AH reaction? 6. In reaction 2, a student forgot to put the lid back on the calorimeter after mixing NaOH pellet with HCl solution. How does it affect the value of AH reactiona? 7. In reaction 3, a student left the solution...
I need help in question 3 and please check question 1 and 2!! Thank you !...
I need help in question 3 and please check question 1 and 2!!
Thank you !
Post Laboratory Questions 1. A student places 138 g of an unknown metal at 99.9 C into 60.00 g of water at 22.2 CL The entire system reaches a uniform temperature of 31.5 , Calculate the specific heat capacity of the metal. mass of water - 60.009 masso metal - 1989 Initiat tempor Walt)- 22.2°C Inil tempo, mural 94.9°C Final Hemp or wale -...
i need help with 1-6
i need help with questions 1-6
Question 1 8 pts Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A element [Select) > b) [Select) c) [Select) d) C10HSCIN2 (Select) Question 1 Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A eleme [Select] S...
i
need help with questions
4, 5, 13, 15, 16
6 pts Question 4 Perform each of the following calculations of the measured numbers and express your answer rounded to the appropriate number of significant figures. Only type the number for the final answer in the box (no units). a) 67.50 mL - 35.50 mL mL b) 5.35 cm x 10.00 cm x 0.50 cm = cm Question 5 4 pts A scientist defines a new unit, the mini-meter, which...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
In my organic chemistry lab we are performing a gas
chromatography experiment and I need help with our prelab
assignment, thanks!
Question 3 1 pts If compound A elutes (comes off) a GC column earlier than compound B in a temperature gradient GC run. What can be inferred about their respective boiling points? Compound A probably has a lower boiling point than that of compound B. Compound A and B have the same boiling point. Elution time does not correlate...
Question 4 2 pts During this week's experiment, a student was provided with a stock solution of FD&C Red 40 dye that was 0.381 mM. Following the procedure in the lab manual, she created Solution #2 by pipetting 19 mL of Solution #1 to a 25 mL volumetric flask, then diluted to the calibration line with Dl water. What is the concentration of Solution #2 in mM? Note: The units of mM are used for grading purposes, and are not...
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
2 pts Question 12 You have the six pieces of metal listed below, plus a beaker of water containing 300 g of water. The water temperature is 21.0 °C and its specific heat is 4.184 J/g.°C. Metal Specific heat (J/g.°c) Mass (g) 1. AI 0.9002 100.0 2. AI 0.9002 50.0 3. Au 0.1289 100.0 4. Au 0.1289 50.0 5. Zn 0.3860 100.0 6. Zn 0.3860 50.0 In an experiment, you are asked to select one piece of metal and heat...
12:47 1 Exit Question 1 0.5 pts When 34.8 g of sodium chloride is dissolved in water, 2.31 kJ of energy is absorbed. Is the enthalpy of dissolution of NaCl exothermic or endothermic? Endothermic Exothermic Question 2 0.5 pts What is the balanced thermochemical equation for the combustion of two moles of gaseous acetylene, C2H2, with oxygen to produce carbon dioxide and water vapor at 24.59°C given that 2512 kJ of heat is released at a constant pressure of 1.14...
looking for question 5, 6 7 and 8
5. In reaction 1, a student measured the temperature of the resultant solution when some NaOH pellets were still left in the calorimeter. How does it affect the value of AH reaction? 6. In reaction 2, a student forgot to put the lid back on the calorimeter after mixing NaOH pellet with HCl solution. How does it affect the value of AH reactiona? 7. In reaction 3, a student left the solution...
I need help in question 3 and please check question 1 and 2!!
Thank you !
Post Laboratory Questions 1. A student places 138 g of an unknown metal at 99.9 C into 60.00 g of water at 22.2 CL The entire system reaches a uniform temperature of 31.5 , Calculate the specific heat capacity of the metal. mass of water - 60.009 masso metal - 1989 Initiat tempor Walt)- 22.2°C Inil tempo, mural 94.9°C Final Hemp or wale -...
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