CHEMISTRY HIGH SCHOOL

Interstellar dust particles help cool the nebular cloud by _____.slowing particles down
allowing particles to collect
clumping particles together
attracting the heat of the nebular cloud

Answers

Answer 1
Answer:

Answer: Attracting the heat of the nebular cloud

Heat is lessened by interstellar dust through attraction of heat in the gas cloud. The nebular cloud’s heat, coming from radiation emitted by stars, is indirectly cooled down by dust through ionization and beams it towards space.

Heat is lessened by interstellar dust through attraction of heat in the gas cloud. The nebular cloud’s heat, coming from radiation emitted by stars, is indirectly cooled down by dust through ionization and beams it towards space.

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An environmental chemist needs a carbonate buffer of pH 10.00. How many grams of Na,Co, must she add to 1.5 L of 0.20 M NaHCO,? K, of HCO, = 4.7 x 10"

Answers

Answer: a

Explanation: it just like simple math but it just adding stuff

Does Halite have non-metallic luster? a) Yes b) No

Answers

Answer: a) Yes

Explanation:

Halite has a vitreous luster that gives it a brilliant, glassy look. A vitreous luster is a nonmetallic luster. Minerals come in many different colors and many times the same mineral can be found in a variety of shades.

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."Al + HCl → AlCl3 + H2

Answers

The balanced equation is:

2Al + 6HCl -> 2AlCl3 + 3H2

There are 2 Al, 6H, and 6 Cl making the equation balanced and if you need the coefficients in order it is: 2,6,2,3

Answer:

2Al + 6HCl -> 2AlCl3 + 3H2

Explanation:

Each period of the periodic table ends with:

Answers

Each period of the periodic table ends with a noblegas.

What are noble gases?

Noble gas constitutes the seven chemical elements that make up up the eighteenth of the periodictable. The elements comprising the noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

These noble gases are odorless, colorless, tasteless, and nonflammable gases. Traditionally, they have been labeled as Group 0 in the periodic table was the name given to them for decades after they were discovered. They were named so be they it was believed that they are not able to bond to other atoms.

This meant that there could not combine with the atoms of other elements to form chemicalcompounds. The electronic structures of these structures and the discovery that some of them are able to combine with other atoms to form compounds led them to have a more appropriate name for Group 18.

Therefore each period of the periodic table ends with a noblegas.

Read more about noblegas, here

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_____ is the time required for one-half of the atoms of a radioisotope to decay to products. a. fusion
b. radioactivity
c. half-life
d. fission

Answers

C half life..............................

The energy required to completely separate the ions from a solid is(A) free energy
(B) lattice energy
(C) kinetic energy
(D) activation energy
(E) ionization energy

Answers

The answer is (B.) lattice energy
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