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Oksanka [162]
3 years ago
7

How much is 1kilometer ?

Chemistry
1 answer:
Lostsunrise [7]3 years ago
8 0

1 kilometer is 1000 meters, 10000 decimeters, 100000 centimeters, 1000000 millimeters, 1.0000E+9 micron, 1.0000E+12 nanometer, 1.0000E+15 picometer, 1.0000E+18 femtometer, 1.0000E+21 attometer, and so much more.



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The Periodic Table of the Elements organizes elements according to their properties. A section of the periodic table is shown. W
horrorfan [7]
You haven't attached any options but anyways, to help you with your question, elements belonging to the same group (e.g. alkali metals, noble gases) all have the same chemical properties. Hydrogen, for example, have the same properties with Sodium, Potassium and Lithium.
3 0
3 years ago
A base has Kb of 2.5 x 10-11. which of the following statements is true?(1 point)
Furkat [3]
I disagree with the answer pick of D. If you have a neutral pH 7 solution and you proceed to add a base even with an relatively insignificantly low Kb your solution would still be more basic then acidic. The answer should be b which is true that the base only ionizes slightly in aqueous solution. This is also truer to the definition of what Kb represents.
3 0
3 years ago
Which of the following is the quantum number set for an electron in the 3rd energy level, dumb-bell shaped orbital, on the z-axi
Juli2301 [7.4K]

Answer:

Explanation:

Principal quantum no "n" = 3

Azimuthal quantum no "l"= 1

Magnetic quantum no "m"= +1/2

Over all is 3pz

5 0
2 years ago
Select all of the following statements that are basic assumptions of the Bohr model of the atom. Atoms have a central nucleus wi
Alekssandra [29.7K]

Answer:

The assumptions of the Bohr model of the atom are:

- Atoms have a central nucleus with electrons in orbit about this nucleus.

- They must gain energy to jump to a higher level, and they release energy when jumping to a lower level.

- Electrons orbit the nucleus, but the orbits can have only certain sizes and energy values.

Explanation:

The Bohr model of the atom establishes that atoms have a central nucleus with positive charge and electrons (with a negative charge) in orbit about this nucleus. In the Bohr model, electrons move in specific orbits with a certain amount of energy and can't jump from one orbit to another around the nucleus. To jump to a higher level, they must gain energy or release energy when jumping to a lower level.

The Thomson model of the atom postulated that <em>atoms are solid spheres of matter</em> and <em>are made of positive material with electrons fixed in place in this positive material</em>.

7 0
2 years ago
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
labwork [276]
Answer:
6(3) - 4 + (3)^2

Explanation:
We are given that:
f(x) = 4-x^2
g(x) = 6x

First, we will compute (g-f)(x) as follows:
(g-f)(x) = 6x - (4-x^2) = 6x - 4 + x^2

Now, we will substitute with x=3 as follows:
(g-f)(3) = 6(3) - 4 + (3)^2

Hope this helps :)
4 0
3 years ago
Read 2 more answers
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