chemical composition

What Are The Physical And Chemical Properties Of Crude Oil?

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What Are The Physical And Chemical Properties Of Crude Oil? Crude oil is a mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon), though it also contains some nitrogen, sulfur, and oxygen. Those elements form a large variety of complex molecular structures, some of which cannot be readily identified. What are

What Are The Four Principles Of Composition?

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What Are The Four Principles Of Composition? Shape and proportion. Positioning/orientation/balance/harmony among the elements. The area within the field of view used for the picture (“cropping”) The path or direction followed by the viewer’s eye when they observe the image. Negative space. What are the key principles of composition? Balance. Emphasis. Movement. Pattern. Repetition. Proportion.