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4 years ago

Which formula represents lead(I I) chromate?

Chemistry

1 answer:

Ymorist [56]4 years ago

7 0

The formula for lead (ii) chromate is: PbCrO4

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Why is the Pacific Northwest receives so much precipitation?

lyudmila [28]

The Cascades rain shadow can be described as such: ocean-influenced moist air masses are forced to rise when they meet the tall moun- tains. The rising air cools, condenses, and the moisture falls as precipitation. On the leeward (dry) side of the mountain, the now dry air warms and sinks.

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3 years ago

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If 0.089 grams of KI is dissolved in 500g of H2O, what is the concentration of the resulting solution in parts per million?

frez [133]

Answer:

The concentration of the resulting solution in parts per million is 177.97

Explanation:

Parts per million (ppm), is a unit of measure for concentration that refers to the number of units of the substance per million units of the set.

The concentration in parts per million expressed in mass / mass is calculated by dividing the mass of the solute (ms) by the mass of the solution (md, sum of the mass of the solute and the mass of the solvent), both expressed in the same unit and multiplied by 10⁶ (1 million).

$ppm=\frac{ms}{md} *10^{6}$

So, being:

ms: 0.089 grams of KI

md: 0.089 grams of KI + 500 grams of H₂O= 500.089 grams

Replacing:

$ppm=\frac{0.089 grams}{500.089 grams}*10^{6}$

ppm= 177.97

The concentration of the resulting solution in parts per million is 177.97

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3 years ago

What scientist designed an experiment that enabled the first successful detection of an individual subatomic particle?

damaskus [11]

Thomson is the scientist who designed an experiment that enabled the first successful detection of an individual subatomic particle. J.J. Thomson (Sir Joseph John Thomson, 1856-1940), who demonstrated in 1897 that "cathode rays" consisted of negatively-charged particles, later named electrons.

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3 years ago

Explain why an atom has a neutral charge

Vinvika [58]

Answer:

Atoms are neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.

Explanation:

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riadik2000 [5.3K]

Answer:

molecules store energy

Explanation:

Hope This Helps! ^^

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3 years ago