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melamori03 [73]
3 years ago
12

A

Chemistry
2 answers:
nataly862011 [7]3 years ago
4 0

Answer:

Variable is a changebale factor in an experiment.

Explanation:

Ainat [17]3 years ago
4 0

Answer: O VARIABLE

Explanation:

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Contrast the silica content of magma in quiet and explosive eruptions
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Magma in quiet eruptions has a low content in silica , while in explosive eruptions, it has a high Content in silica.  A volcano that erupts quietly has  magma that is low in silica. Low-silica magma has low viscosity and flows easily.  A volcano that erupts explosively has magma that is high in silica. High-silica magma has high viscosity, making it thick and sticky, thus it flows slowly.
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3 years ago
According to the bohr model of the atom which particles are allowed to exist, in any one of a number of a energy level
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<span> the line-emission spectrum of an atom is caused by the energies released when electrons. releases energy of only certain values. </span>
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3 years ago
How many atoms are in 2.85x10^3 g of gallium
OLga [1]

Answer:

2850 grams I hope this help

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3 years ago
Photochemical chlorination of 1,2−dibromoethane gives a mixture of two stereoisomers of c2h3br2cl. draw the structure of one of
dem82 [27]

<em>See the structure at the bottom-left corner of the sketch attached.</em>

<h3>Explanation</h3>

Replacing an H atom with a Cl atom in a 1,2-dibromoethane molecule produces a molecule of C₂H₃Br₂Cl. Its structural formula is show in the top-left corner of the sketch attached.

The molecule contains no double or triple bonds. It has no E/Z isomers. The two stereoisomers can only be enantiomers. A red asterisk * is placed next to the only <em>chiral</em> carbon in this molecule.

That carbon atom is connected to

  • one H atom,
  • one Cl atom,
  • one Br atom, and
  • the alkyl group CH₂Br.

The two isomers are <em>mirror images </em>about this carbon atom. Indicate how the four groups are arranged in space using the wedge and dash notation.

  • Solid lines refer to chemical bonds in the plane of the paper.
  • Wedges refer to bonds pointing out of the page towards you.
  • Dashes refer to bonds pointing into the page away from you.

The last row of this sketch shows the structure of both isomers. The question is asking for only one. Showing either of them should work.

4 0
2 years ago
Which of the following are density labels?
shtirl [24]

Answer:

Kg/L , g/mL

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

7 0
3 years ago
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