What has to happen during solvation of a substance? (select all that apply) solute particles separate...
Which of the following factors determines what state a substance exists in (select all that apply) a. Size of molecules b. Attractive forces between molecules c. Temperature d. The potential energy of the molecule e. Pressure f. Location of the molecules (in a jar/lab vs. 'outside' in the atmosphere or ocean) The term for changing from a liquid to a solid is _______ and is _________. Put endothermic or exothermic in the second blank. The term for changing from a...
Which of the following statements correctly describe melting and melting point? Select all that apply. Check all that apply. The temperature of a solid rises steadily during the melting process. At the melting point of a substance the solid and liquid phases are in equilibrium Pressure changes have little effect on the melting point of a substance. During melting the kinetic energy of the particles increases dramatically
What are the advantages of using a solvent pair for
recrystallization? Select all that apply.
What are the advantages of using a solvent pair for recrystallization? Select all that apply. You can quickly make the solution supersaturated by adding more of the solvent with greater dissolving power. You can calculate the precise amounts of the solvents needed for recrystallization. You can quickly make the solution supersaturated by adding more of the solvent with less dissolving power. You don't have to...
q 2 and 4 please!
Question 2 Which of the following compounds will hydrogen bond with water (H20)? Select all that apply. Cl2 CC14 CH20 NH3 SCI2 Question 3 Which of the following will have the lowest boiling point? Ne OKr O Ar o Не Question 4 Which of the following statements is FALSE? O A compound with stronger intermolecular forces will have a higher boiling point When a substance melts, some - but not all- of the intermolecular forces...
What state of matter has the weakest intermolecular forces for the same substance? Explain please a. gas b. liquid c. solid d. they are all the same
What are reasons to conduct a health assessment? Select all that apply. A. To generate data for grants and other sources of funding B. A comprehensive assessment is needed to meet accreditation requirements C. A health or environmental crisis has developed D. A topic is frequently brought up by members of the community and may even be considered newsworthy. E. A concern is noted by PH staff F. After an earlier assessment identifies a concern that needs further assessment 2....
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
omeone answer all the wuestions
: 24.11 Equal masses of He and Ne are placed in a sealed container. What is the partial pressure of He if the sotal pressure in the (E) 5 atm (A) 1 atm (B) 2 atms (C) 3 atm 2.A pure liquid in an open vessel boils at the temperature at which the (A) molar entropy of the liquid becomes equal to that of the gas vapor pressure of the liquid becomes equal to the...
What price might the brother-in-law have in mind? Please select ALL the answers that apply. There may be more than correct answer. The brother-in-law might expect to pay somewhere in the vicinity of the average product cost of the patio set as calculated by you. The brother-inlaw might expect to pay somewhere around $140, the material and direct labour cost of the patio set The brother-in-law might not expect to pay anything, after all he is family The brother-in-law might...
It is recommended that the adolescent should have a pelvic exam when: (select all that apply) A. she engages in any form of sexual activity B. she has menarche C. sexual abuse is suspected D. a contraceptive is desired E. she turns 18 years of age Typical cardiovascular changes in the toddler include: A. decreasing heart rate B.increasing O2 saturation C. decreasing blood pressure D. increasing respiratory rate What is considered one of the most important health promotion practices for...