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nignag [31]
3 years ago
15

Students can use _________ to distinguish pure substances, such as elements and compounds with a constant composition, from othe

r substances. A) color B) density C) particle size D) state of matter
Chemistry
2 answers:
Stella [2.4K]3 years ago
6 0

Answer is: B) density.

Pure substance is made of only one type of atom or only one type of molecule, it has definite and constant composition with distinct chemical properties.

Mixtures are physical combinations of pure substances that have no definite or constant composition.

With constant composition density of pure substance is always the same and in other substances it can vary according the composition.

Density is a measure of mass per unit of volume.

The SI derived unit for density is the kilogram/cubic meter, but chemist usually use gram per cubic centimeter.

ollegr [7]3 years ago
3 0
Density ........on god thats the answer
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allochka39001 [22]

Answer:

B. CO₂ and H₂O.

Explanation:

When any organic substance undergoes complete combustion, it produces carbon dioxide (CO₂) and water (H₂O).

In the case of methane, the balanced reaction is:

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With the above information in mind the correct answer is option B. CO₂ and H₂O.

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8 0
3 years ago
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A marble rolls off horizontally from the edge of table top 1.50 m above the floor. it strikes the floor 2.0 m from the base of t
GrogVix [38]

a. t=0.553 s

b. vox(horizontal speed) = 3.62 m/s

<h3>Further explanation</h3>

Given

h = 1.5 m

x = 2 m

Required

a. time

b. vo=initial speed

Solution

Free fall motion

a. h = 1/2 gt²(vertical motion=h=voyt+1/2gt²⇒voy = 0)

\tt t=\sqrt{\dfrac{2h}{g} }

t = √2h/g

t = √2.1.5/9.8

t=0.553 s

b. x=vox.t(horizontal motion)

\tt x=v_{ox}\times t

vox=x/t

vox=2/0.553

vox=3.62 m/s

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2 years ago
What is the total electrons needed for an Octet of SiCL4?
Juli2301 [7.4K]

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Afina-wow [57]

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