Question: A compound was analyzed and was found to contain the following percentages of the elements by mass: boron, 78.14%; hydrogen, 21.86%. Determine the empirical for...

A compound was analyzed and was found to contain the following percentages of the elements by mass: boron, 78.14%; hydrogen, 21.86%. Determine the empirical formula of the compound.

 

Question: Write the composition of one atom of each of the three isotopes of silicon: 28Si, 29Si, 30Si.?

Write the composition of one atom of each of the three isotopes of silicon: 28Si, 29Si, 30Si.

 

Question: Calculate the number of iron atoms in 125 moles of iron.

Calculate the number of iron atoms in 125 moles of iron.

 

Question: What is PCR and why is it useful?

What is PCR and why is it useful?

 

Question: If you run hemoglobin on an SDS-PAGE gel, how many bands are you likely to see? Why?

 If you run hemoglobin on an SDS-PAGE gel, how many bands are you likely to see? Why

 

Question: What item is placed on a ring and used to support a funnel, crucible, or evaporating dish?

What item is placed on a ring and used to support a funnel, crucible, or evaporating dish

 

Question: Why does contamination form on an unwashed fingerprint in a Petri dish left in an incubator for one week?

Why does contamination form on an unwashed fingerprint in a Petri dish left in an incubator for one week

 

Question: Calculate the number of grams in 0.329 moles of K.?

Calculate the number of grams in 0.329 moles of K.