2 years ago

Please help, need asap, just tell me where they go

Chemistry

1 answer:

Lostsunrise [7]2 years ago

5 0

Answer:

1 to 2 3 to 6

Explanation:

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How many moles of mercury(Hg) are in 1.30 *10.7 atoms or mercury

Svetach [21]

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?? moles Hg ------------ 1.30x10⁷ atoms

(1.30x10⁷) x 1 / 6.02x10²³ => 2.159x10⁻¹⁷ moles

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2 years ago

How many of the zeros in the measurement 0.050060 are significant

Feliz [49]

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2 years ago

How many parts per million of lead is found in 250 ml of water if there is 1.30g of lead in the water? 1ml=1g

SSSSS [86.1K]

Answer:

5200 ppm

Explanation:

As per the definition, parts per million of a contaminant is a measure of the amount of mass of contaminant present per million amount of the solution. It is denoted by ppm.

Given in the question,

Water = 250 ml = 250 g

Lead = 1.30 g

So,

ppm of Lead = $\frac{Lead}{Water} \times 10^6$ = $\frac{1.30}{250} \times 10^6$ = 5200 ppm

So, as calculated above, there is 5200 ppm of lead present in 250 ml of water.

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2 years ago

Why do scientist use models to study atoms and molecules?

Nesterboy [21]

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3 years ago

Please help, need asap, just tell me where they go​

Please help, need asap, just tell me where they go