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The pH scale runs from 0 to 14 according to the book page 570 (Chapter 11 Section 7.A)

3 Answers

The answer to this is B. In order to solve this, you need to divide the gallons with the square feet which means that 2,800,000 that you will divide with 500. The answer that you will get is 5600 gallons per square foot. There is a need for people to have filtered water especially at this day...Read More

3 Answers

True. Many countries still have source of suitable drinking water without treatment.

2 Answers

The correct answer to this question is E, 1.56%. To get this answer, we can divide the given values in the word problem. We will divide the 28 thousand gallons of filter water by the 1.8 million values of backwashing. This will provide us with 0.0155555556. This would be the correct answer,...Read More

2 Answers

The question does not suggest that the shape is irregular and so to calculate the answer in cubic feet, you merely have to multiply the length by the width by the height of the basin. It is easiest to multiply the first two, find the result and then multiply that by the third...Read More

2 Answers

The correct answer to this item is letter D. To get the surface area of a circle, one must use the formula r squared multiply by pi. Since the radius is not given, divide the diameter by 2. So, 55 ft divided by 2 is 27.5 and this will be the radius.
Next, multiply 27.5 by 27.5 and the pro...Read More

2 Answers

I agree that proof of professional competence is essential ('C')l, but I think that 'D' should be added as well since there is no better way to demonstrate knowledge of essential rules and regulations than with a comprehensive examination. Thank You, Carlos Velez.

2 Answers

92mL/min, 92.0297

There are two difficult aspects to this problem, specific gravity, and the percentage of alum in the solution.

Math Constant: Specific gravity of water = 1

Math Constant: 1 gram of water = 1mL

Math Constant: There are 1000 grams of water in one liter, and one...Read More

There are two difficult aspects to this problem, specific gravity, and the percentage of alum in the solution.

Math Constant: Specific gravity of water = 1

Math Constant: 1 gram of water = 1mL

Math Constant: There are 1000 grams of water in one liter, and one...Read More

1 Answer

2.1

mg/l and ppm are the same

1.6 million gallons x 8.34lbs per gallon = 13.344 million pounds, so 13.344 is 1ppm of 1.6 million gallons

28lbs / 13.344 =2.0983213 rounded to...Read More

mg/l and ppm are the same

1.6 million gallons x 8.34lbs per gallon = 13.344 million pounds, so 13.344 is 1ppm of 1.6 million gallons

28lbs / 13.344 =2.0983213 rounded to...Read More

1 Answer

A. The curve of the surface of a liquid

C. The proper line of vision to read a liquid in a buret

C. The proper line of vision to read a liquid in a buret

1 Answer

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