Which property of water accounts for the fact that it melts under increased pressure?

a. covalent bonding
b. heat capacity
c. hydrogen bonding

I’m thinking C. What is it?

——
Electrons in water spend more time near the oxygen than the hydrogens, resulting in the formation of a…

a. magnetic moment
b. dipole
c. hybridized orbital

————-

Which property of water accounts for its unusually high surface tension?

a. Polarity
b. ion-dipole forces
c. Van der Waals forces

I’m thinking A.

————-

What phenomenon accounts for the unique ability of water to dissolve an ionic crystal?

a. formation of a hydration sphere
b. London dispersion forces
c. lattice energy

Identify the letter of the choice that best completes the statement or answers the question.

1. As a result of diffusion, the concentration of many types of substances
A always remains greater inside a membrane.
B always remains greater on the outside of a membrane.
C becomes imbalanced on both sides of a membrane.
D eventually becomes balanced on both sides of a membrane.

2. Diffusion takes place
A only through a lipid bilayer membrane.
B only in liquids.
C from an area of high concentration to an area of low concentration.
D from an area of low concentration to an area of high concentration.

3. Refer to the illustration above. Which cell is most likely to lose both water molecules and solute molecules as the system approaches equilibrium?
A cell 1 B cell 3
C cell 4 D cell 2

4. Refer to the illustration above. In this system, solute molecules in cell 2 are most likely to
A remain in cell 2.
B diffuse into cell 1.
C diffuse into cell 4.
D adhere to cell 2’s membrane.

5. Refer to the illustration above. In which direction are water molecules in this system most likely to diffuse?
A from 1 to 2 B from 4 to 3
C from 3 to 1 D from 2 to 4

6. The dispersal of ink in a beaker of water is an example of
A diffusion. B active transport.
C endocytosis. D osmosis.

7. heavy rains : flooding ::
A osmosis : plasmolysis
B active transport : ATP
C concentration difference : osmosis
D high solute concentration : isotonic solution

8. Sugar molecules can enter cells through the process of
A exocytosis. B osmosis.
C ion pumps. D facilitated diffusion.

9. Channels utilizing facilitated diffusion
A work in two directions.
B require an electrical signal to function.
C Both a and b
D None of the above

10. Which of the following is not characteristic of facilitated diffusion?
A It requires a carrier protein.
B It requires no energy input.
C It involves a change in the shape of its carrier.
D It moves substances against a concentration gradient.

11. Which of the following is true of ions and their transport across cell membranes?
A The “gates” for ion channels are always open.
B Electrical or chemical signals may control the movement of ions across cell membranes.
C Because they are charged particles, the movement of ions across cell membranes requires energy input.
D Ion channels always allow any type of ion to pass through them.

12. Which of the following does not expend energy?
A diffusion B active transport
C a sodium-potassium pump D endocytosis

13. Which of the following enters a cell by active transport?
A glucose B lactose
C potassium ion D water

14. The process by which water passes into or out of a cell is called
A solubility. B selective transport.
C endocytosis. D osmosis.

15.

Refer to the illustration above. The process shown is called
A osmosis. B active transport.
C diffusion. D facilitated diffusion.

16. The sodium-potassium pump usually pumps
A potassium out of the cell.
B potassium into the cell.
C only a potassium and sugar molecule together.
D sodium into the cell.

17. ion channels : ions ::
A facilitated diffusion : carrier protein
B sodium-potassium pump : ATP
C sodium-potassium pump : sodium
D plasmolysis : turgor pressure

18. Ridding the cell of material by discharging it from sacs at the cell surface is called
A pinocytosis. B exocytosis.
C endocytosis. D phagocytosis.

19. Molecules that are too large to be moved across a cell membrane can be removed from the cell by
A diffusion. B lipid carriers.
C osmosis. D exocytosis.

20. Molecules that are too large to be moved through the membrane can be transported into the cell by
A osmosis. B lipid carriers.
C diffusion. D endocytosis.

21. endocytosis : exocytosis ::
A phagocytosis : bacteria B cold : hot
C white blood cell : bacteria D secrete : exocytosis

22. Placing a plant into a hypertonic environment will
A cause turgor pressure to increase.
B have no effect.
C cause turgor pressure to decrease.
D cause the plant to take in water.

23. A calcium ion channel will allow
A any kind of ion to pass through it.
B only calcium ions to pass through it.
C positive ions to pass through it.
D None of the above
I’ve done it already. Im checking answers. I wanna make sure they are right… thank you

Which property of water accounts for the fact that it melts under increased pressure?

a. covalent bonding
b. heat capacity
c. hydrogen bonding

I’m thinking C. What is it?

——
Electrons in water spend more time near the oxygen than the hydrogens, resulting in the formation of a…

a. magnetic moment
b. dipole
c. hybridized orbital

————-

Which property of water accounts for its unusually high surface tension?

a. Polarity
b. ion-dipole forces
c. Van der Waals forces

I’m thinking A.

————-

What phenomenon accounts for the unique ability of water to dissolve an ionic crystal?

a. formation of a hydration sphere
b. London dispersion forces
c. lattice energy

can it make you have an illness like high blood pressure? or any other ones???

ive been feeling really dizzy for a couple of days, and i borrowed my daughters blood pressure machine and i was higher than usual, when i stand up i get so dizzy to the point im wobbly. i have an appointment to get my lab results tomorrow, but is there anything i can do till then, why is it doing this? i have never had high blood pressure?

My breathing rate when relaxed is between 7-9 breaths per minute..I feel fine, blood pressure good, not short of breath…I did grow up at a high attitude, 7000 feet now live at 2500 feet…I have read online that breathing rates can get down to 6 per minute when relaxed. It says online normal rates are 12-16 per minute. Male, 46yrs old..is my breathing ok?

Recently my mom started to feel more dizzy and she has had constant headaches. She’s checked her blood pressure and it’s pretty high. My question is what caused this? She doesn’t have any diseases or anything like that. Do you think she’s going through menopause? She’s only 46 years old. The weird thing is that it happened all of a sudden. Could it be the swine flu or any other thing?

thank you in advance.

if you know any of these, just give me the number, and then any answer you can give. It’s not cheating ’cause I was absent, but my dad has no idea. thx!

1) The two most abundant gasses in the atmosphere are ___ and ___.

9) The thickest layer of the atmosphere is the ___, but the densest air is located in the ___.

22) The Greenhouse Effect has the greatest influence on the ___ layer of the atmosphere.

35) Air always travels from areas of ___ density or pressure to areas of ___ density or pressure.

39) Land breezes occur at night when the ___ cools faster than the ___.

40) Sea breezes occur during the day when the water is ___ than the land. The wind blows from the ___ to the ___.

41) Tools meteorologists use to gather weather data include ___, ___, and ___.

49) A ___ air mass is a cool and dry air mass, which moves south and east. It can form over northern Canada and Alaska.

50) A ___ air mass is an air mass from the south, formed over tropical waters of the Pacific and Atlantic and the Gulf of Mexico.

51) A ___ air mass brings hot, dry air and is formed over south western US and Mexico.

52) A ___ air mass forms over the North Pacific Ocean all year and brings winter rains to the west coast.

53) High pressure air located over the poles makes cold polar air ___.

55) ___ means the study of weather.

57) A/an ___ is used to measure wind speed.

58) A ___ front has the most severe weather.

59) ___ are the clouds seen with cold fronts. These clouds also produce hail.

Thank you sooooo much for even just one answer!

A. Is the pressure inside the tube less than or greater than the atmospheric pressure?

B. How many mm of mercury is 22.0 mm of water the equivalent of? Show dimensional analysis.

My breathing rate when relaxed is between 7-9 breaths per minute..I feel fine, blood pressure good, not short of breath…I did grow up at a high attitude 7000 feet noe live at 2500 feet…I have read online that breathing rates can get down to 6 per minute when relaxed. It says line normal rates are 12-16 per minute. Male, 46yrs old.