Answer:
B) Bacteria lack a definite nucleus and have no nuclear membrane.
Explanation:
Bacteria never evolved them
Answer:
C. 2.0 mL
Explanation:
This value is due to the fact that the burettes are instruments that allow accurately measure volumes of liquids, in this case it has a precision of ±0.01 mL, which indicates that this is the smallest value that the burette can measure with accuracy, which indicates that 2 mL can be measured accurately without any problem.
Hey there!
C₇H₉+ HNO₃ → C₇H₆(NO₂)₃+ H₂O
Our elements: C, H, N, and O.
Balance H.
Ten on the left, eight on the right. Add a coefficient of 2 in front of H₂O.
C₇H₉+ HNO₃ → C₇H₆(NO₂)₃+ 2H₂O
Balance N.
One on the left, three on the right. Add a coefficient of 3 in front of HNO₃.
C₇H₉+ 3HNO₃ → C₇H₆(NO₂)₃+ 2H₂O
This unbalanced H, let's increase the coefficient in front of H₂O from 2 to 3 to rebalance.
C₇H₉+ 3HNO₃ → C₇H₆(NO₂)₃+ 3H₂O
Balance O.
Nine on the left, nine on the right. Already balanced.
Balance C.
Seven on the left, seven on the right. Already balanced.
Our final balanced equation:
C₇H₉+ 3HNO₃ → C₇H₆(NO₂)₃+ 3H₂O
Hope this helps!
Answer:
The answer to your question is: mass = 0.760 g
Explanation:
Data
V = 0.285 L
T = 57°C = 330°K
P = 1 atm
R = 0.082 atm L/mol°K
mass = ?
Formula
PV = nRT
n = PV / RT
Substitution
n = (1)(0.285) / (0.082)(330)
n = 0.285 / 27.06
n = 0.011
mW Pentane = (12 x 5) + (12 x 1) = 72 g
72 g of pentane ----------------- 1 mol
x ----------------- 0.0105 mol
x = (0,0105 x 72) / 1
x = 0.756 g ≈ 0.760 g