2 years ago

Describe the formation of an image in a pinhole camera

Chemistry

1 answer:

Alla [95]2 years ago

8 0

Answer:

Explanation:

A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole camera – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.

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How many moles of ba(oh)2 are present in 275 ml of 0.200 m ba(oh)2?

DENIUS [597]

You have to put your attention to the unit of concentration. It is expressed in terms of molarity, which is represented in M. It is the number of moles solute per liter solution. So, you simply have to multiply the molarity with the volume in liters.

Volume = 275 mL * 1 L/1000 mL = 0.275 L
<em>Moles Ba(OH)₂ = (0.200 M)(0.275 L) = 0.055 mol</em>

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3 years ago

Which is a pure substance? A. sugar B. trail mix C. leaf salad D. sugar water

mote1985 [20]

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I hope this helps!

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3 years ago

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lions [1.4K]

Answer: D

Explanation: