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Law Incorporation [45]
2 years ago
15

During a rainy spring, where are you most likely to find surface runoff

Chemistry
1 answer:
Dahasolnce [82]2 years ago
7 0

Answer:On a sloped parking lot

Explanation:

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If the atomic number of an element is 9 and the mass number is 19, how many neutrons does the atom have? 10 9 19 28 1 points
IRINA_888 [86]
Remember....

mass number= atomic number + number of neutrons

If the mass number is 19 and the atomic number is 9, then the number of neutrons is 19-9 which is 10.


6 0
3 years ago
The use of lead paint in houses was banned in 1978 due to the health hazards associated with lead, specifically that high levels
arlik [135]

Environmental Chemistry studies the health hazards associated with lead, which  is dangerous to humans.

Environmental Chemistry studies chemicals present in air, water and soil and their  impact on humans and their environment.

Now, it was discovered that even low doses of lead particles in the paint when inhaled or ingested caused damaging effect to the body  such as Impaired balance, seizures, ataxia and even death.

With the role of Environmental chemists in thier research and findings, the world has been informed on the negative effect on the expose of lead and other heavy metals like it  to man and his environment.

See more here:brainly.com/question/22517940

3 0
2 years ago
14. How do you describe an atom in which the number of protons is equal
masha68 [24]
The number of protons in the nucleus of the atom is equal to the atomic number (z) and the number of electrons in a neutral atom is equal to the number of protons
8 0
3 years ago
Standard notation for 31,254,000
bearhunter [10]
That seems to be standard notation
4 0
3 years ago
What mass of NaCl is dissolved in 150 g of water in a .050<br> msolution?
mart [117]

Answer:

0.4383 g

Explanation:

Molality is defined as the moles of the solute present in 1 kg of the solvent.

It is represented by 'm'.

Thus,  

Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}

Given that:

Mass of solvent, water = 150 g = 0.15 kg ( 1 g = 0.001 g )

Molality = 0.050 m

So,

0.050=\frac {Moles\ of\ the\ solute}{0.15}

Moles = 0.050\times 0.15\ mol= 0.0075\ mol

Molar mass of NaCl = 58.44 g/mol

Mass = Moles*Molar mass = 0.0075\times 58.44\ g = 0.4383 g

6 0
3 years ago
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