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kogti [31]
3 years ago
12

What are the tube feet on a star fish

Chemistry
2 answers:
Snezhnost [94]3 years ago
8 0
They are used to pass food to the oral mouth at the center, and can attach to surfaces.
icang [17]3 years ago
8 0
This is a question for the biology section, however, here is the answer.
Tube feet are used for holding onto things, moving around, and opening the shells of clams and oysters. These tube feet are connected to the radial canals of the starfish.
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Kito puts his spoon into a helping of fresh, hot, mashed potatoes as shown in the figure. Which process takes place when the two
Svet_ta [14]

Answer:

B. is the answer

Explanation:

Energy in form of heat is transferred from the warmer mashed potatoes to the cooler spoon.

7 0
3 years ago
A compound with molecular formula C6H15N exhibits a singlet at d 0.9 ppm (1H), a triplet at 1.10 ppm (3H), a singlet at 1.15 ppm
Triss [41]

Answer:

CH3 - CH2 - NH - C(CH3)3

Explanation:

The 1HNMR is the acronym for Proton nuclear magnetic resonance and it is used in chemistry or Chemical laboratory for the analysis and identification of compounds.

In order to be able to answer the question accurately you have to have the tables containing all the values for chemical shift. The Chemical shift is measured in ppm and it occur due to Resonance frequency variation.

From the table, a singlet at 1.15 ppm (9H) is - C(CH3)3.

A singlet at d 0.9 ppm (1H) shows the presence of a secondary amine group, that is -R2NH group.

A triplet at 1.10 ppm (3H) shows that we have;

CH3- CH2-

A quartet at 2.6 ppm (2H) shows that we have;

-CH2 - CH3.

Therefore, joining all together we have;

CH3 - CH2 - NH - C(CH3)3.

Kindly check attached file for the picture of the structure.

5 0
3 years ago
The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call
Igoryamba

Physical weathering

3 0
3 years ago
When the shift occurs in the earth's crust , what does the energy radiates us out as ?
Stels [109]
When a sudden break or shift occurs the energy radiates it comes out of the water
8 0
3 years ago
How many moles of argon are in 24.3 g of argon
maksim [4K]

Answer:

0.607mol

Explanation:

n(AR) = mass / molar máss

= 24.3 /40

=0.607

3 0
3 years ago
Read 2 more answers
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