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vladimir1956 [14]
3 years ago
13

Which of the following representations shows the correct placement of trophic levels?

Chemistry
1 answer:
OleMash [197]3 years ago
4 0
You have to start listing from the bottom :

3. Secondary Consumers

2. Primary Consumers

1. Producer

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What is the total mass of solute in 1000. grams of a solution having a concentration of 5 parts per million?
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50 grams or 50,000 mili grams  is the mass of solute in 1000 grams of a solution having a concentration of 5 parts per million.

Explanation:

Total mass of solution = 1000 grams or 1000 ml since 1 gram = 1 ml

concentration is 5 parts per million ( 5 mg in 1000 ml solution or 0.005 gram in 1000 ml)

the formula used for parts per million:

parts per million = \frac{mass of solute (mg)}{volume of solution}

putting the values in the equation:

parts per million = \frac{mass of solute}{volume of solvent}

0.005 x 1000 = mass of solute

50 grams= mass of solute

converting this into mg

50,000 mg. is the total mass of solute in 5ppm of 1000 ml solution.

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