General Chemistry I
Scientists want to determine if exercise lowers cholesterol. What should they do to test their hypothesis?
Run experiments
Is HF a strong or weak acid?
Weak acid
What is the answer to this math problem, using correct sig figs?
(45+62.6)/2.00
54
Which is more reactive (aka is more likely to undergo a reaction): an alkene or an alkane?
Alkene
When a polypeptide chain bends into a sheet, what type of secondary structure is formed?
A B-pleated sheet
What is the mass number of an atom of beryllium with 7 neutrons?
11
What type of reaction can be represented by the equation below?
AB+CD --> CB + AD
double replacement
What is the molar mass of SO2?
64.07
Draw cyclononene
Nine carbon ring with one double bond
Why are the number of adenine and thymine molecules in DNA equal to one another?
1. DNA is a double helix, which means that there are two strands of polynucleotides bonded together.
2. Adenine and thymine are always paired together between the two DNA strands.
What is the half-life of a radioisotope?
The time it takes for one-half of the sample to decay.
Name this compound: Cu(NO3)2
Copper (II) Nitrate
Diamond has a density of 3.52 g/mL. What is the volume in cubic centimeters of a diamond with a mass of 25.6 g?
7.27 cm3
When an amide undergoes hydrolysis, what are the two main products formed?
Carboxylic acid and an amine (ammonium salt)
During glycolysis, what is the six-carbon glucose molecule to?
Pyruvate (3-carbon molecule)
What is the electron arrangement for calcium?
2,8,8,2
When does a chemical reaction reach equilibrium?
The rate of the forward reaction equals the rate of the reverse reaction
At STP, how many moles of carbon dioxide are present in 62.0 L?
2.77 moles
Draw the product of the following reaction: trans-2-butene undergoes hydrogenation.
Draw butane
What separates cellular components from its external environment?
Cell Membrane
PF3 has what molecular shape?
trigonal pyramidal
According to Charles' Law, how are volume and temperature related?
They are directly related (aka, when one increases, the other does as well).
The [OH-] of a solution with a pH of 7.6 is what?
What reaction(s) will convert a carboxylic acid to a primary alcohol?
Reduction x2
What types of bonds are present in amylopectin, the branched component of starch?
a-1,4-glycosidic bonds and a-1,6-glycosidic bonds