1.The formula for lactose is C12H22O11, and the monohydrate is C12H22O11*H2O. What is the percent by weight of lactose in lactose monohydrate? Give your answer to four significant digits as a percentage (xx.xx) - do not include "%"2.If the image in the polarimeter appears as shown above, which button should you press? The "up" or R blue button The red button The green button No button, you have found the correct optical rotation. The "down" or L blue button 3. Suppose you measure 7.000 g of a substance and dissolve it in 100.0 mL of water, and place the sample in a 2.000 dm path-length sample tube, and then observe a rotation of 19.5 degrees with the sodium-D lamp. What is the specific rotation? Give your answer to three digits, without units (xxx)

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Answered: The formula for lactose is C12H22O11,…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter22: Organic And Biological Molecules

Section: Chapter Questions

Problem 176MP

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Question

The formula for lactose is C₁₂H₂₂O₁₁, and the monohydrate is C₁₂H₂₂O₁₁*H₂O. What is the percent by weight of lactose in lactose monohydrate? Give your answer to four significant digits as a percentage (xx.xx) - do not include "%"

If the image in the polarimeter appears as shown above, which button should you press?

	The "up" or R blue button
	The red button
	The green button
	No button, you have found the correct optical rotation.
	The "down" or L blue button

3. Suppose you measure 7.000 g of a substance and dissolve it in 100.0 mL of water, and place the sample in a 2.000 dm path-length sample tube, and then observe a rotation of 19.5 degrees with the sodium-D lamp. What is the specific rotation? Give your answer to three digits, without units (xxx)