The shape of a molecule is tetrahedral. How many lone pairs are most likely on the central atom?zero
two
three
four

Answers

Answer 1

Answer:

Answer: Zero lone pairs on the central atom.

Explanation:

Lone pairs and bond pairs together decides the geometry of the molecule.
Bond pairs together decides the shape of the molecule.

The molecule is with with tetrahedral shape which means that molecule has a tetrahedral geometry.

The value of number of electrons around the central atom with tetrahedral geometry according to VESPR theory is '4'. Which means that electrons around the central atom are 4.

Since, the molecule is in tetrahedral shape which means four bonds are pointing in direction towards the four vertices of tetrahedral which means their are zero lone pair present on the central atom.

Answer 2

Answer: The number of lone pairs that are most likely found on the central atom is zero. There are no lone pairs found on the central atom.

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Which tiny, round “factory” puts together protein and is often found in the endoplasmic reticulum?A.
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B.
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C.
Golgi body

D.
ribosome

Answers

In the cytoplasm, ribsomal RNA (rRNA), a type of RNA, andprotein combine to form a nucleoprotein called a ribosome. The ribosomeserves as the site and carries the enzymes necessary for proteinsynthesis. They are often takes the shape of small round particlesattached in the endoplasmic reticulum. The ribosome attaches itself to m-RNAand provides the stabilizing structure to hold all substances in position asthe protein is synthesized. Several ribosomes may be attached to a single RNAat any time.

i believe that the answer is B , chloroplast. you can work out the problem any other wat too.

i hope this helps

What orbits the nucleus of an atom?

Answers

Electrons orbit the nucleus of an atom. They are very small, in fact they are 1/2000 of an amu. Electrons are negative while the inside of an atom includes the positive protons and neutral neutrons. :D

Electrons. They are found in the orbitals outside the nucleus.

Compared to pure water, an aqueous solution of calcium chloride has a(1) higher boiling point and higher freezing point
(2) higher boiling point and lower freezing point
(3) lower boiling point and higher freezing point
(4) lower boiling point and lower freezing point

Answers

Answer: option (2) higher boiling point and lower freezing point.

Explanation:

Colligative properties are those properties of solution that depend on the concentraion of the solute.

Increase of boling point and depression of freezing point are two of those colligative properties.

Regarding the boiling point, as some impurities (in this case the solute calcium chloride) are present in the solvent (water) ,at the same temperature, less molecules of water will reach the surface to escape, at a given temperature. Hence, you have to increase the temperature to manage that the number of molecules and their speed increase and so all the molecules can escape fro, the liquid phase to form the gas. So, the boiling point of the water with the salt in it will be higher than the boiling point of pure water.

As for the freezing point, in a solution the particles of solute interfere with the attractive forces between the molecules of water avoiding that the solvent passes to solid state at the normal freezing point. Hence, the temperature to freeze will be lower.

Increasing the intensity and duration of an exercise program too quickly can lead to injury.a. True
b. False

Answers

It is true that a sudden increase in both intensity and duration of physical exercise can result in injury. The body needs time to process any changes. Muscles need to build strength and flexibility gradually and the joints need time to acclimate to changes in pressure.

this is a true statement

What would indicate that a physical change takes place when copper is drawn into wire?

Answers

A physical change takes place when copper is drawn into wire when the wire can be made into smaller in diameter but longer in length tubes. This is a physical change becasue the copper is just molded into wire without any application of any substance.

Which of the following combinations would result in the largest attractionbetween particles?
Large charges close together
Small charges close together
Large charges far apart from each other
OSmall charges far apart from each other