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Ostrovityanka [42]
3 years ago
14

Why is pure silicon a poor conductor at room temperature brainly

Chemistry
1 answer:
trapecia [35]3 years ago
4 0
Pure silicon is a poor conductor at room temperature because it has 4 valence electrons
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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}

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converting this into mg

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

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Weight measures
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