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3 years ago

B. Write the formula for density.

Chemistry

2 answers:

nalin [4]3 years ago

5 0

Answer and Explanation:

$\huge\boxed{Density=\frac{mass}{volume}}$

That's the formula ↑

For a 20-gram mass that takes up a volume of 5 cubic centimeters:

$density$ $is=\frac{20}{5} gm/cm^{3}$

$=4gm/cm^3$

ddd [48]3 years ago

4 0

Density is mass divided by volume

Happy to help! Please mark me as the brainliest!

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The survival of aquatic organisms depends on the small amount of O2 that dissolves in H2O . The diagrams above represent possibl

koban [17]

Answer:

Diagram 1

Explanation:

The solubility of the oxygen gas in water has to do with the interaction of the oxygen with the dipoles in water.

Water is a polar molecule having oxygen as the negative dipole and hydrogen as the positive dipole.

Water can interact with the oxygen atoms in the molecule via intermolecular hydrogen bonds with molecular oxygen as shown in diagram 1.

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3 years ago

Energy released from cell respiration is know as

never [62]

Energy released from cell respiration is know as ATP

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3 years ago

Discuss how the following factors determine the rate of electron transfer in biological systems:

Cloud [144]

Answer:check explanation

Explanation:

(a). HOW THE DISTANCE BETWEEN ELECTRON DONOR AND ACCEPTOR AFFECTS THE RATE OF ELECTRON TRANSFER IN BIOLOGICAL SYSTEM:

Distance between the acceptor and the donor can affect in two ways; short distance and long distance effect.

Short distance causes

electronic orbitals of donor and acceptor directly overlap whereas in LONG DISTANCE reactions this coupling is indirect because of

sequential overlaps of atomic orbitals of the donor, the intervening medium, and the orbitals of the acceptor.

(b). HOW REORGANIZATION ENERGY OF REDOX ACTIVE SPECIE SURROUNDING MEDIUM AFFECTS:

the reorganized energy does not depend on the pre-existing intra molecule electric field. The charge transferred inside the molecule interacts with its aqueous surroundings.

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3 years ago

TRUE OR FALSE : Cell specialization is when a cell has a particular function or job. help ?

liubo4ka [24]

Answer:

True

Explanation:

Cell specialization is the process by which generic cells change into cells meant to do certain tasks within the body

hope this helps :)

8 0

3 years ago

If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the struct

Inessa05 [86]

Answer:

The correct option is: bent 109°

Explanation:

Covalent molecules are the molecules in which the atoms are linked by covalent bonds. The electrons involved in the formation of a covalent bond are known as shared pair or bond pair of electrons.

The three-dimensional arrangement of the atoms of a molecule in space is known its molecular structure or geometry.

Given molecule: XY₂, having two lone pairs around the central atom X.

Since the molecule XY₂ has two lone pairs and two bond pairs of electrons. Therefore according to the VSEPR theory, the given molecule has a bent molecular geometry with 109° bond angle.

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4 years ago