A.
Explain: I think this….
Answer:
3 bags are required.
Explanation:
Find the number of mg needed for 150 pounds
150 pounds * 5 mg/pound = 750 mg
1 bag = 250 mg
x bags = 750 mg Cross multiply
250 * x= 750 Divide by 250
x = 750/250
x = 3
Answer:
Option b=> 0.1 M CH3COOH , 0.1 M CH3COONa.
Explanation:
In chemistry, when an acid or a base(alkali) is added to a solution and the solution pH does not change then we say that the solution is a BUFFER SOLUTION (that is a solution, upon the addition of acid or base will show resistance in pH value).
In order to be able to answer this question efficiently we have to consider the mathematical representation or Equation below;
pH = pKa + log ( [ A^-] / [HA] )--------------------------------------------------------------------(1).
What the mathematical representation or Equation (1) above is telling is is that if [A^-] or [HA] is high then there will be the production of buffer with higher buffer capacity.
Answer:
Explanation:
Briefly, the scientific process starts by making an observation of a phenomenon, which leads you to question what is happening, and then to formulate a hypothesis.
The hypothesis is a reasonable explanation of the phenomenon, which relates a cause and a consequence, and that can be testable, and can result to be true or false.
Then, you design an experiment to test the hypothesis.
The experiments will give you a set of data which must be interpreted to conclude whether your hypothesis was true or false. This may be seen as the final step of the process, which gives the outcome of the scientific process. This conclusion must be based on reliable data and a logical.
If, your conclusion is clear, logically deducted from the data, using a correct analysis, your experiment was succesful. No matter whether the hypothesis resulted true or false.
Nevertheless, this is not really the final step, as now sharing the information with the scientific community is very important. I t might also happen that you want to iterate the process, to test a new hypothesis.