After the food has been chewed and lubricated, it is pushed by the tongue into the___________.larynx
pharynx
stomach

Answers

Answer 1

Answer: The answer is pharynx

Answer 2

Answer:

Pharynx is cone-shaped passageway leading from the oral and nasal cavities in the head to the esophagus and larynx. The pharynx chamber serves both respiratory and digestive functions

After the food has been chewed and lubricated, it is pushed by the tongue into the Pharynx

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The diagram shows the electron arrangement in a molecule of ammonia, showing only outershell electrons.
I
H
(i) State the type of bonding in ammonia.
1
6

Answers

The diagram shows 5 eletctron in the outermost shell of Nitrogen atom out of which 3 electrons are involved in the bond formation with 3Hydrogen atoms.

The type of bond in ammonia is Covalent.

What is covalent bond ?

Covalent bond is the bond formed by mutual Sharing of electrons by both the atoms taking part in the bond formation.

Nitrogen has 5valence electrons of which only 3 are shares with the 3 atoms of hydrogen (one electron shares with one atom of hydrogen)

Hence, type of bond in ammonia is covalent.

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Final answer:

Ammonia (NH3) has a covalent bonding type resulting in a tetrahedral electron-pair geometry, but because of the lone pair, the molecular structure is trigonal pyramidal. The bond angle is slightly less than 109.5⁰ due to the lone pair occupying more space.

Explanation:

The type of bonding in ammonia, which has a molecule structure as shown in the question, is covalent bonding. The ammonia molecule, NH3, has one lone pair and three single bonds which gives it a tetrahedral electron-pair geometry, as shown in Figure 7.18. However, because one of these regions is a lone pair that is not counted in the molecular structure, the molecule assumes a trigonal pyramidal shape.

The lone pair occupies more space than the single bonds, which leads to a slight deviation in the actual bond angles from the idealised angles. The angle in the ammonia molecule is slightly less than 109.5⁰ due to this additional electron pair's space occupancy.

Learn more about Covalent Bonding in Ammonia here:

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What is the balanced equation for methyl ethanoate using the condensed structural formulae

Answers

the answer is....CH3COOCH3

In chemical equations, as long as all of the coefficients are the same on both sides of the equation, the equation is balanced.True
False

Answers

False. The subscripts have to be read and you must see if both sides have the same number of atoms.

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isotopes are atoms that contain the same number of protons but a different number of neutrons in their nuclei. based on this information, which statement about isotopes is true? a. isotopes are atoms of the same element. b. isotopes are atoms that have the same mass number. c. isotopes are atoms of different elements that have similar chemical and physical properties. d. isotopes are atoms of different elements that belong to the same family on the periodic table.

Answers

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A solution of copper sulfate (CuSO4) produced by bioleaching has a concentration of 0.319 g/dm3 Relative atomic masses (Ar): Cu = 63.5 O = 16 S = 32 Calculate the number of moles of copper that can be produced from 1 dm3 of this solution.