Suppose peas are planted in Indiana on May 1. If the peas need 1200 growing degree days before they can be picked, and if the me
2 answers:
Answer:
c. 40
Explanation:
Given that:
The mean temperature for each day during May and June is = 70°F ; &
a base temperature = 40°F
Then the average temperature difference = 70°F - 40°F
= 30°F
That means the pea accumulate 30 growing degrees per day.
NOW, If the peas need 1200 growing degree days and accumulate 30 per day, then they will need 40 days before they are harvested
(i.e = 40)
Hence, if the pea plants are planted in Indiana on May 1, the peas will be ready on June 10.
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<em>Mixed molarity = 0.25 M</em>
<em>Osmotic pressure solution: 6.15 atm</em>
<h3><em>Further explanation</em></h3>Osmotic pressure is the minimum pressure given to the solution so that there is no osmotic displacement from a more dilute solution to a more concentrated solution.
General formula:
π = osmotic pressure (atm)
M = solution concentration (mol / l)
R = constant = 0.08205 L atm mol-1 K-1
T = Temperature (Kelvin)
Mixing solution
To find the molarity of the mixed solution we can use the following formula:
Vc. Mc = V1.M1 + V2.M2
where
Mc =Mixed molarity
Vc = mixed volume
Mr. NaCl = 58.5
Mr. Dextrose = C₆H₁₂O₆ = 180
mole NaCl = gram / Mr
mole NaCl = 1.75 / 58.5 = 0.03
Dextrose mole = 40/180 = 0.22
Assuming 1 liter of solution
M mixture = mole NaCl + mole dextrose / 1 liter
M mixture = 0.03 + 0.22 / 1 L
M mix = 0.25 M
T = 25 + 273 = 298 K
The osmosis pressure of the solution becomes:
π = 0.25. 0.0825. 298 = 6.15 atm
<h3><em>Learn more</em></h3>The osmotic pressure brainly.com/question/8195553
<h3><em>Answer details </em></h3>Grade: Senior High School
Subject: Chemistry
Chapter: Colligative property
Keywords: osmotic pressure, molarity, mole,dextrose, NaCl