Answer:
1a) .68 moles 1b)4.1E-23 molecules.
2a) .37 moles 2b) 2.27E-23 molecules
Explanation:
1a) CO2 is equal to 44 grams (C→12 grams,O→16 grams[·2]) .30g/44g is .68 moles.
1b) multiply 1A by advogadros number (6.022E-23)
2a) NaCl is 58 grams. 22/58 is .37 moles.
2b) multiply 2A by advogadros number.
you'd answer #3 the same way #1 and #2
Answer:2097.5998675091255
Explanation:
Answer:
C.) 76.1 grams
Explanation:
To find the mass of bromine, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass), then (2) convert moles AlCl₃ to moles Br₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Br₂ to grams Br₂ (via molar mass). It is important to arrange your ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).
Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)
Molar Mass (AlCl₃): 133.332 g/mol
2 AlCl₃ + 3 Br₂ --> 2 AlBr₃ + 3 Cl₂
Molar Mass (Br₂): 2(79.904 g/mol)
Molar Mass (Br₂): 159.808 g/mol
42.3 g AlCl₃ 1 mole 3 moles Br₂ 159.808 g
------------------ x ----------------- x ---------------------- x ------------------- =
133.332 g 2 moles AlCl₃ 1 mole
= 76.0 g Br₂
*Our answers are slightly different most likely because we used slightly different molar masses*
The nitrogen-nitrogen triple bond is the strongest bond of this set.
Answer:
1. salt bridge - tertiary structure
2. amide bond - primary structure
3. disulfide bond - tertiary structure
4. beta-pleated sheet - secondary structure
5. alpha helix - secondary structure
Explanation:
A salt bridge is simply a neutralisation reaction between two molecules of opposite charge. Examples are: carboxylate ion end (RCOO−) of either aspartic acid or glutamic acid and ammonium ion end (RNH3+) from lysine or guanidinium (RNHC(NH2)2+) of arginine. The disulfide bond is usually gound in the Cysteine amino acid with the structure R−S−S−R′. Also, it is usually derived by the bonding of two thiol groups. They are both important components of protein and they determine the overall structure of protein and hence its fold.
For beta-pleated and alpha-helix structures, they are usually defined by the varying patterns of hydrogen bonds between the amine- (-NH2) and carboxyl-(-COOH) groups which are at the side chain of the amino acids. They determine the geometry of the protein hence why they are secondary structures.
Amide bond is an unbranched sequence of amide(peptide) bonds which form long chains of polypeptides (polyamides). This shows that it is a primary structure. They are also formed by dehydration where the amine- (-NH2) and carboxyl-(-COOH) groups bonds together to form a peptide bond with the loss of water.
