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klasskru [66]
3 years ago
13

What invention helped to contribute to the start of the civil war

Chemistry
2 answers:
lawyer [7]3 years ago
5 0

Answer:

The Cotton Gin

Explanation:

The cotton gin: A game-changing social and economic invention. On this day in 1793, young inventor Eli Whitney had his U.S. patent for the cotton gin approved, an invention that would definitely have an impact on social and economic conditions that led to the Civil War.

Veronika [31]3 years ago
5 0

Answer:cotton gin

Explanation:

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Oxidation of Nitrogen in NO2​
tiny-mole [99]

Explanation:

oxidation of Nitrogen in NO2 is +4

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2 years ago
How many grams of F− must be added to a cylindrical water reservoir having a diameter of 2.02 × 102 m and a depth of 87.32 m?
aksik [14]

Complete Question:

To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800 ppm fluoride. How many grams of F− must be added to a cylindrical water reservoir having a diameter of 2.02 × 102 m and a depth of 87.32 m?

Answer:

2.23x10⁶ g

Explanation:

The concentration of the fluoride (F⁻) must be 0.800 ppm, which is 0.800 parts per million, so the water must have 0.800 g of F⁻/ 1000000 g of the solution. The density of the water at room temperature is 997 kg/m³ = 997x10³ g/m³. So, the concentration of the fluoride will be:

0.800 g of F⁻/ 1000000 g of the solution * 997x10³ g/m³

0.7976 g/m³

The volume of the reservoir is the volume of the cylinder: area of the base * depth. The base is a circumference, which has an area:

A = πR², where R is the radius = 1.01x10² m (half of the diameter)

A = π*(1.01x10²)²

A = 32047 m²

The volume is then:

V = 32047 * 87.32

V = 2.7983x10⁶ m³

The mass of the F⁻ is the concentration multiplied by the volume:

m = 0.7976 * 2.7983x10⁶

m = 2.23x10⁶ g

8 0
3 years ago
If the mass of an object is 10 kg and the acceleration of an object due to
mars1129 [50]
Hmm the answer is 2.454

No explanation needed it’s just 2.454
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Scientific Notation expresses a value as the product of a number between 1 and 10 and
Bezzdna [24]
... and a power ot ten.

For example: 1,3x10^21 is in scientific notation, but 13x10^20 is not in scientific notation.
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babymother [125]

Answer:

all elements have a different atomic number

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Atomic number of element does not affect their reactions with others

6 0
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