I think the correct answer from the choices listed above is the third option. <span>In the redox reaction given, the element that was reduced was Fe or iron. It's charge reduced from +3 to zero, a neutral charge. Hope this answers the question. Have a nice day.</span>
Answer:
169
Explanation:
protons+neutrons=atomic mass
70+99=169
Answer : The number of automobiles needed are, 
Explanation :
First we have to calculate the mass of blueberries.
As, 1.0 mole of blueberries contains 
blueberries
So, 0.75 grams of blueberries contains 
blueberries
Mass of blueberries = 
Now we have to calculate the number of automobiles needed.
Number of automobiles needed = 
Number of automobiles needed = 
Number of automobiles needed =
Thus, the number of automobiles needed are,
The Correct Answer Is/ Runoff often carries pesticides from farmers' fields that can damage aquatic ecosystems.
Answer:
27.99 dm³
Explanation:
Applying
PV = nRT................ Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.
From the question, we were aksed to find V.
Therefore we make V the subject of the equation
V = nRT/P................ Equation 2
Given: n = 1.31 moles, T = 37°C = 310K, P = 904 mmHg = (904×0.001316) = 1.1897 atm
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
V = (1.31×310×0.082)/(1.1897)
V = 27.99 dm³
