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 "%"
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 "%"
If the image in the polarimeter appears as shown above, which button should you press?
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The "up" or R blue button |
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The red button |
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The green button |
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No button, you have found the correct optical rotation. |
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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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