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Setler [38]
3 years ago
8

____________ is a point source of water pollution; _____________ is a nonpoint source of water pollution.

Chemistry
1 answer:
Deffense [45]3 years ago
6 0

Answer:

good afternoon

Explanation:

thanks I will send

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Part a how many carbon atoms are in a 2-carat pure diamond that has a mass of 0.40 g . express your answer using two significant
shutvik [7]

We have to calculate the number of carbon atoms present in 2-carat pure diamond.

The number of carbon atoms present in 2-carat pure diamond is: 0.19 X 10²³ number of carbon atom.

Diamond is one allotrope of carbon. Atomic mass of carbon is 12.

Mass of one mole carbon atom is 12 g. One mole carbon contains Avogadro's number i.e, 6.023 X 10²³ number of atoms.

0.40 g diamond contains 0.40/12 moles= 0.033 moles of carbon atom.

So, number of carbon atoms present in 0.40 g diamond (i.e, 0.033 mole diamond) is 0.033 X 6.023 X 10²³= 1.98 X 10²²=0.19 X 10²³ .

Therefore, 0.19 X 10²³ number of carbon atoms are in a 2-carat pure diamond that has a mass of 0.40 g

3 0
4 years ago
A ball has a mass of 2.0 kg and travels a distance of 24 meters in 10 seconds what is the Velocity
Amanda [17]
2.4 meters per second
8 0
3 years ago
How is a cation different from a anion
masya89 [10]
Cation means a positively charged ion. Anion is a negative one
5 0
3 years ago
3. Rb(CN) (aq) + Znl, (aq) →<br> What is the production
Salsk061 [2.6K]

Answer: RbI (aq) and Zn(CN)2 precipitate

Explanation: zinc cyanide is insoluble in water.

3 0
3 years ago
Label each statement below as either describing the limit of detection (LOD) or the limit of quantitation (LOQ
Orlov [11]

Answer:

It is the minimum amount of analyte that produces a signal which can be measured with reasonable accuracy - LOQ

The concentration is equal to three times the standard deviation of the signal from the blank divided by the slope of the calibration curve - LOD

The concentration is equal to 10 times the standard deviation of the signal from the blank divided by the slope of the calibration curve - LOQ

It is the minimum amount of analyte that produces a signal that is significantly different from the blank - LOD

Explanation:

We define the limit of detection has the lowest amount of analyte that produces a signal that is significantly different from a blank solution ( the absence of the substance). It is calculated as three times the standard deviation of the signal from the blank divided by the slope of the calibration curve.

The limit of quantitation (LOQ) is defined as the minimum amount of analyte that produces a signal which can be measured with reasonable accuracy. It is measured as 10 times the standard deviation of the signal from the blank divided by the slope of the calibration curve.

6 0
3 years ago
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