A student added 1.28 g of sodium carbonate monohydrate and 1.28 g of calcium chloride separately into two clean, pre-weighed beakers . Then added about 10 mL of distilled water to the calcium chloride, and 20 mL to the sodium carbonate monohydrate and stirred each sample until dissolved. Slowly, with stirring, the student added small portions of the Na2CO3 solution to the CaCl2 solution. The mixture began to froth. The students stirred the mixture vigorously until it was no longer frothy, and settled to the bottom. The precipitate was filtrated, washed, and dried. The mass of the dried precipitate was 0.75 g. What is the percent yield of this reaction? Keep the correct number of significant figures.

Which control test tubes contained reducing sugars? Are these the results consistent with the sugars tested, explain? Sucrose and lactose are both disaccharides, explain why the test results are the same or different? Sucrose 8 minutes Blue color like Benedict's solution, not reaction.        -    Lactose 8 minutes orange-red color       + Glucose 8 minutes Orange-red color        +

Two-dimensional gel electrophoresis of proteins in a cell extract provides a qualitative way to compare proteins with respect to intracellular abundance. Describe a quantitative approach to determine the number of molecules of an enzyme per cell.

Predict the product(s) obtained when each of the following compounds is treated with a mixture of nitric acid and sulfuric acid. Select all that apply. 18.41d * Your answer is incorrect.

The protein neuroglobin has a heme group associated with it. It is an example of a Ο Ο Ο Ο Ο Ο lipoprotein nucleoprotein glycoprotein phosphoprotein O metalloprotein Ⓒhemoprotein

i need help please

please answer 4 and 5 multiple choice

How do you answer 9 and 10? (This is not graded; it is for practice and acquisition; please refer to the first picture to answer).

what are the products of this reaction