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Chemistry

1 answer:

Montano1993 [528]3 years ago

7 0

Answer:

B: Parent rock breaks into smaller pieces.

Explanation:

Weathering the first step in the process of soil formation. The process of breaking up off the parent rocks into simple forms, is termed as weathering. The formation of soil is a very gradual and slow process. It takes millions of years for the rocks to become soil. The dead and decaying matter of plants and animals are also included in the rocks. Water, sun, climatic conditions and rain are some of the factors that effect weathering.

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The average density of a carbon-fiber-epoxy composite is 1.615 g/cm3. the density of the epoxy resin is 1.21 g/cm3 and that of t

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The composite material is composed of carbon fiber and epoxy resins. Now, density is an intensive unit. So, to approach this problem, let's assume there is 1 gram of composite material. Thus, mass carbon + mass epoxy = 1 g.

Volume of composite material = 1 g / 1.615 g/cm³ = 0.619 cm³
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a.) V of composite = V of carbon fibers + V of epoxy resin
0.619 = x/1.74 + (1-x)/1.21
Solve for x,
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Answer:

Explanation:

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IgorLugansk [536]

The percentage of Chromium in Chromium Oxide is calculated as follow,

Step 1:
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Step 2:
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