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Chemistry, 14.12.2020 18:50, harrypottergeek31
The Dust Bowl was a time In the 1930s when prairie states in the Midwest had farmlands torn apart by wind erosion and storms. This disaster caused food shortages and financial hardship. What practice is most helpful to prevent another similar tragedy?
A. no-till farming to allow roots to hold soil together
B. over watering of fields to keep soil wet
C. terrace farming by putting walls up on hills
D. agricultural reform to change the types of crops planted
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Answers: 3
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What is the relation between concentration of reactants and the rate of chemical reaction?
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Chemistry, 22.06.2019 20:00, jalenevoyles
Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.
Answers: 3
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The Dust Bowl was a time In the 1930s when prairie states in the Midwest had farmlands torn apart by...
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