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Mila [183]
4 years ago
11

Scientific theories are subject to change.

Chemistry
1 answer:
Rudik [331]4 years ago
4 0
True, Scientific theories may change with the addition of new information or improved experiments and observations.
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What is the density, in g/cm3, of an object with a mass of 21 g and volume of 15 cm3?
maks197457 [2]

Answer:

1.4 g/cm^3

Explanation:

Density = Mass/Volume

Density = 21g/15cm^3

Density = 1.4 g/cm^3

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-Unicorns110504

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4 0
3 years ago
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What is the chemical formula for the compound magnesium perchlorate? Use the list of polyatomic ions and the periodic table to h
8_murik_8 [283]

The chemical formula for the compound magnesium perchlorate is Mg(ClO₄)₂

Magnesium perchlorate or Mg(ClO₄)₂ is an ionic compound.

Perchlorate here is an anion which is represented by ClO₄⁻. Perchlorate is a polyatiomic anion, where one Cl atom is bonded to four O atoms.

The magnesium cation is represented by Mg²⁺

So one Mg²⁺ cation combines with two ClO₄⁻ anion to form one molecule of Mg(ClO₄)₂


6 0
3 years ago
Which term is used to describe the attraction that an oxygen atom has for the electrons in a chemical bond?
Mekhanik [1.2K]

electronegativty

It is the attraction force

8 0
3 years ago
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Which change does an increase in heat energy cause?
Fynjy0 [20]

Answer:

d is the answer

Explanation:

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4 0
2 years ago
In terms of newtons 3rd law of motion desribe this picture.
KIM [24]
Newton's third law (for every action, there is an equal and opposite reaction) means that in every interaction (in this case, that of the objects in the image), there is a pair of forces acting on the two interacting objects. <span>When you sit on a chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body. There are two forces resulting from this interaction - a force on the chair and a force on your body. This is embodied in the image by the two objects exerting force on each other (indicated by the arrows).</span><span>

Hope this helps.</span>
5 0
3 years ago
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