Answer:
a.- Water will flow from the cucumber to the solution
Explanation:
This is an example of osmosis in difference of concentration of solutions. In the salty solution there is more salt molecules than inside the cucumber. Trying to make up for the same salt concentration inside that outside the cucumber, it will tend to flow some of the water that is inside the cucumber tissues to the environment that surrounds it.
Answer:
Theoretical yield of C8H8BrNO:
In moles
0.000945
In grams
0.204
Explanation:
Theoretical yield of a reaction is defined as the quantity of the product obtained from the complete conversion of a limiting reactant in a chemical reaction. Theoretical yield can be expressed as grams or moles.
Equation of reaction:
C8H9NO + Br2 --> C8H8BrNO + HBr
Since C8H9NO is the limiting reagent, 1 mole of C8H9NO reacted to form 1 mole of C8H8BrNO
Mass of C8H9NO = 129 mg
= 0.129 g.
Molar mass of C8H9NO = 135.17 g/mol.
Number of moles of C8H9NO = mass/molar mass.
= 0.129/135.17
= 0.00095 moles of C8H9NO
Since 1 mole of C8H9NO yielded 1 mole of C8H8BrNO
Therefore, 0.000954 moles of C8H8BrNO
Theoretical yield (in grams) = molar mass * number of moles
= 214.06 * 0.00095
= 0.204 of C8H8BrNO
Answer:
Number of moles of sodium reacted = 0.707 moles
Explanation:
P(H₂) = P(T) – P(H₂O)
P(H₂) = 754 – 17.5 = 736.5 mm Hg
Use the ideal gas equation which
PV= nRT, where P is the pressure V is the volume, n is the number of moles R is the Gas Constant and T is temperature
<u>Re- arrange to calculate the number of moles and using the data provided</u>
n = P x V/R x T
n =736.5 x 8.77/62.36367 x (mmHg/mol K) x (20 + 273)
n = 0.35348668
n = 0.353 moles H₂
<u>from the equation we know that</u>
0.353 mole H₂ x 2mole Na/1mole H₂, So
0.353 x 2 = 0.707 mole Na
The number of moles of Sodium metal reacted were 0.707 moles.
A I think that a bar graph would best represent this information.
Answer: Peter is a Field Officer and Jessica is a Lab Officer
Explanation:
For Plato it should be, Peter is a "Field officer" because he's going into the fiend of the crime scene to find his evidence
And Jessica is a "Lab officer" because she stay's in the lab to analyze the evidence brought to her by Peter
