Homework Answers
Answer : b) minerals with more silica have a lower melting point and will melt first.
Explanation : Silica, usually has a much lower melting point so mostly low temperature mineral melts are rich in silica (felsic).
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Question 2 1 pts Partial melting can generate magmas more felsic that the solid from which...
What properties cause some magmas to be more felsic thanothers?Different minerals crystallize at different...
What properties cause some magmas to be more felsic than others?Different minerals crystallize at different temperatures, changing the chemistry.Some parts of the mantle are felsic and some are mafic, creating felsic magma in the crust.Water from subducting ocean plate mixes with the magma to create felsic magmaAnimals change the chemistry of the magma, making it more felsic.Silica content in igneous rocks controls (select the correct term)["texture", "viscosity", "crystal size"] which, in turn, controls ["eruption style", "crystal size"] ...
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
Question 17 1 pts What solubility properties are important in the selection of a solvent for...
Question 17 1 pts What solubility properties are important in the selection of a solvent for recrystallisation? sparingly soluble in hot solvent and readily soluble in cold solvent readily soluble in both hot and cold solvent sparingly soluble in both hot and cold solvent readily soluble in hot solvent and sparingly soluble in cold solvent Question 18 1 pts How would you modify the procedure given in the Laboratory Manual if you did not know which solvent to use? if...
Thanks in advance! 1.33/2 pts Partial Question 2 1. Which of these protein separation methods would be the most useful f...
Thanks in advance!
1.33/2 pts Partial Question 2 1. Which of these protein separation methods would be the most useful for accurately obtaining the size (M.W.) of a protein? [Select] 2. Which of these protein separation methods would be the most useful for accurately obtaining the isoelectric point (M.W.) of a protein? Select] 3. Which method does both of these together? Two dimensional electrophoresis Answer 1: size-exclusion chromatography Answer 2: isoelectric focusing Answer 3: Two dimensional electrophoresis
1.33/2 pts Partial...
answer 1-4 Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
Question 2 2 pts Which chemical is expected to have the highest boiling point? O Cu...
Question 2 2 pts Which chemical is expected to have the highest boiling point? O Cu О НЕ 0 H₂O CH3CH2CH3 Question 3 2 pts Which material is expected to have the highest surface tension? O CH3CH2CH2CH3 O CH3OCH3 O H20 O CH3CH2OH Question 4 2 pts When a heating curve for a material going through phase change is graphed with temperature on the x-axis, and heat added to the system on the y-axis, the phase change is clear because...
Question 7 2 pts The IRR of System 1 is 83.93 percent and the IRR of...
Question 7 2 pts The IRR of System 1 is 83.93 percent and the IRR of System 2 is 50.07 percent. The NPV of System 1 is $22,969.42 and the NPV of System 2 is $36,001.43. System 1 delivers a higher IRR because it requires a lower initial investment and the cost is recovered the first year. Thus, even with lower cash inflows in the years after startup, System 1 is able to deliver a higher return on the initial...
Question 16 1 pts A typical indifference curve is negatively sloped because: as we consume more...
Question 16 1 pts A typical indifference curve is negatively sloped because: as we consume more of one good, we are willing to give up the consumption of another good without changing our utility higher indifference curves represent higher levels of utility higher indifference curves represent lower levels of utility we assume that a consumer's income is constant Question 17 1 pts A typical indifference curve: O is convex to the origin (bowed in) has a constant slope is concave...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
Question 17 1 pts What solubility properties are important in the selection of a solvent for recrystallisation? sparingly soluble in hot solvent and readily soluble in cold solvent readily soluble in both hot and cold solvent sparingly soluble in both hot and cold solvent readily soluble in hot solvent and sparingly soluble in cold solvent Question 18 1 pts How would you modify the procedure given in the Laboratory Manual if you did not know which solvent to use? if...
Thanks in advance!
1.33/2 pts Partial Question 2 1. Which of these protein separation methods would be the most useful for accurately obtaining the size (M.W.) of a protein? [Select] 2. Which of these protein separation methods would be the most useful for accurately obtaining the isoelectric point (M.W.) of a protein? Select] 3. Which method does both of these together? Two dimensional electrophoresis Answer 1: size-exclusion chromatography Answer 2: isoelectric focusing Answer 3: Two dimensional electrophoresis
1.33/2 pts Partial...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
Question 2 2 pts Which chemical is expected to have the highest boiling point? O Cu О НЕ 0 H₂O CH3CH2CH3 Question 3 2 pts Which material is expected to have the highest surface tension? O CH3CH2CH2CH3 O CH3OCH3 O H20 O CH3CH2OH Question 4 2 pts When a heating curve for a material going through phase change is graphed with temperature on the x-axis, and heat added to the system on the y-axis, the phase change is clear because...
Question 7 2 pts The IRR of System 1 is 83.93 percent and the IRR of System 2 is 50.07 percent. The NPV of System 1 is $22,969.42 and the NPV of System 2 is $36,001.43. System 1 delivers a higher IRR because it requires a lower initial investment and the cost is recovered the first year. Thus, even with lower cash inflows in the years after startup, System 1 is able to deliver a higher return on the initial...
Question 16 1 pts A typical indifference curve is negatively sloped because: as we consume more of one good, we are willing to give up the consumption of another good without changing our utility higher indifference curves represent higher levels of utility higher indifference curves represent lower levels of utility we assume that a consumer's income is constant Question 17 1 pts A typical indifference curve: O is convex to the origin (bowed in) has a constant slope is concave...
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