:select a fischer projection of d-galactose, which is an epimer of glucose with respect to the c4 position.

Glucose is a Monosaccharide which contains four stereocenters. Stereocenters are chiral carbons to which all the four groups attached have different masses. Glucose is also known as Diastereomer because it contains more than one configurations about the chiral centers.

Also, when two compounds containing same type of configurations about all chiral centers except one are called as Epimers. For example, in D-Glucose when the configuration at carbon number 4 is changed then the resulting compound formed is the epimer of D-glucose and is called as D-Galactose. Or, if the configuration at carbon two is changed then the epimer formed is called as D-Mannose.

Below are the structures of D-Glucose and D-Galactose which are epimers of each other due to configuration change at carbon 4.

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.