What is the name of the flower part that elevates the stigma

Answers

Answer 1

Answer: The style raises the stigma above the base of the flower and separates it from the ovary.

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David kept 100 grams of radioactive sodium in a container. He observed the amount of sodium left in the container after regular intervals of time and recorded them in the table shown below.Time (hours) Amount of sodium in container (in grams)
0 100
15 50
30 25
45 12.5

Based on the observations, which of these is most likely David's inference?
A.The half life period of radioactive sodium is 15 hours.
B.The half life period of radioactive sodium is 50 hours.
C.The amount of sodium left in the container after 60 hours will be 10.5 grams.
D.The amount of sodium left in the container after 60 hours will be 1.5 grams.

Answers

First we have to understand what a half life is. A half life is a measure of time when the amount of a certain object is 50% of the original amount. Hence the answer for this is letter A. The initial amount is 100. fifty percent of 100 is 50 and that happens after 15 hours. Hence, 15 hours is the half life period.

Answer: A. The half life period of radioactive sodium is 15 hours.

Explanation:

Half life is the time taken by a reactant to reduce to its original concentration. It is designated by the symbol $t_(1)/(2)$ .

Given:

At 0 hours the amount of sodium in container is 100 grams

After 15 hours , the amount of sodium in container is 50 grams which is half of the original amount of 100 grams.

It will take 15 hours for half of a 100 g sample to decay to half of the amount i.e. 50 grams.

The adrenal glands respond to______

Answers

The adrenal gland respond to stress that is experienced in your body. These are produced within the medulla. The cortisol helps regulate your metabolism, sugar levels and blood pressure. The adrenal glands are controlled by the pituitary gland.

Are the strengths of the interactions between the particles in the solute and between the particles in the solvent before the solute and solvent are combined greater than, less than, or equal to the strengths of the interactions between solute particles and solvent particles after dissolution? Explain.

Answers

Answer:

Less than

Explanation:

The process of dissolution occurs as a kind of "tug of war". On one side are the solute-solute and solvent-solvent interaction forces, while on the other side are the solute-solvent forces.

Only when the solute-solvent forces are strong enough to overcome the pre-mixing forces do they overcome the "tug of war", and thus dissolution occurs.

Thus, it is concluded that the interaction forces between solute particles and solvent particles before they are combined are less than the interaction forces after dissolution.

For the dissolution of the soluteparticles in the solvent particles, the force of attraction between the particles of solute and between the particle of solvent must be less than the interaction between the solute particles and solvent particles after dissolution.

In a solution the forces act between the solute molecules, solvent molecules, and solute-solvent molecules. For the dissociation to take place the bond between the solute and solvent has to be formed. The resultant will result in the dissolution of the solute in the solvent mixture. The strong solute-solute and solvent-solvent bond will result in difficulty in the formation of the solute-solvent bond, and the dissolution will not take place.

Thus for the dissolution of the solute particles in the solvent particles, the force of attraction between the particles of solute and between the particle of solvent must be less than the interaction between the solute particles and solvent particles after dissolution.

For more information about dissolution, refer to the link:

brainly.com/question/9949108

A solution with a ph of 2.0 has a hydrogen ion concentration ten times greater than a solution with a pha. 1.0
b. 3.0
c. 0.20
d. 20

Answers

The answer is c. 0.20 .

Solutions of aluminum nitrate and sodium sulfate react to form sodium nitrate and aluminum sulfate. Classify this reaction.2Al(NO3)3(aq) + 3Na2SO4(aq) → Al2(SO4)3(s) + 6NaNO3(aq)
A) Synthesis
B) Decomposition
C) Double Replacement
D) Single Replacement
I choose C was wondering if I was correct

Answers

C is the correct answer. Double displacement reaction, also called as metathesis, is a type of reaction wherein two compounds react to form new compounds. This case the cations and the anions of the reactants replace each other forming the new compounds.

Answer:

C: Double Replacement

Explanation:

What is one way to speed up a chemical reaction without otherwise affecting the reaction? A. add a catalyst B. decrease surface area C. change the products D. change the reactants

Answers

A. add a catalyst is the correct answer.

A catalyst never takes part in the reaction, so it does not affect the reaction.

Hope this helps~

A. add a catalyst is the correct answer.

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Using the following phase diagram, which line segment describes the interface between solid and vapor?A-B B-C A-B-C B-D

This problem has been solved!See the answerNaCl is an ionic solid. The Na+ and Cl− ions in NaCl are bonded through an electrostatic force of attraction commonly known as the ionic bond. Water is a polar solvent. The oxygen atom, being more electronegative, attracts the electron cloud toward itself. As the electron cloud is pulled by the oxygen atom, it carries a partial negative charge, and the hydrogen atoms carry a partial positive charge. This partial separation of charges in the water molecule makes it polar. Predict which intermolecular forces contribute the most to the dissolution of NaCl in water. Check all that apply.a. Ion-ion forcesb. Ion-dipole forcesc. Dipole-dipole forcesd. Hydrogen bondingSuppose that NaCl is added to hexane (C6H14) instead of water. Which of the following intermolecular forces will exist in the system?a. Ion-dipole force between Na+ ions and a hexane moleculeb. Ion-ion force between Na+ and Cl− ionsc. Dipole-dipole force between two hexane moleculesd. Hydrogen bonding between Na+ ions and a hexane moleculee. London dispersion force between two hexane molecules