Which of the following questions may best be answered by studying an organism's

Which particles give the nucleus its posyive charge

Slav-nsk [51]

Proton gives nucleus positive charge P+

6 0

2 years ago

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Solve the following mole-mass problem. Refer to the periodic table. How much mass does 0.50 mole of copper contain?

andre [41]

It is 31.75g of copper is contained in .50 mole of copper.

7 0

3 years ago

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Lewis structure for CO2

liq [111]

O = C = O Straight because there is no solitary electrons on C

5 0

2 years ago

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Ne4ueva [31]

Answer:

32,127.02 grams of hydrogen hexafluorosilicate will contain this 25,434 grams of F.

Explanation:

Volume of cylindrical reservoir = V

Radius of the cylindrical reservoir = r = d/2

d = diameter of the cylindrical reservoir = d = $4.50\times 10^1 m=45 m$

r = d/2 = 22.5 m

Depth of the reservoir = h = 10.0 m

$V=\pi r^2 h$

$=3.14\times (22.5 m)^2\times 10.0 m=15,896.25 m^3=15,896,250 L$

$1 m^3=1000 l$

Volume of water cylindrical reservoir : V

Density of water,d = 1 kg/L

Mass of water cylindrical reservoir = m

$m=d\times V=1 kg/L\times 15,896,250 L=15,896,250 kg$

1.6 kilogram of fluorine per million kilograms of water. (Given)

Concentration of fluorine in water = 1.6 kg/ 1000,000 kg of water

In 1000,000 kg of water = 1.6 kg of fluorine

Then $15,896,250 kg$ of water have x mass of fluorine:

$\frac{x}{15,896,250 kg\text{kg of water}}=\frac{1.6 kg}{1000,000 \text{kg of water}}$

$x=\frac{1.6 kg}{1000,000}\times 15,896,250 kg=25.434 kg$

15,896,250 kg water of contains mass 25.434 kg of fluorine.

25.434 kg = 25434 g

25,434 grams of fluorine should be added to give 1.6 ppm.

Percentage of fluorine in hydrogen hexafluorosilicate :

Molar mass hydrogen hexafluorosilicate = 144 g/mol

$F\%=\frac{6\times 19 g/mol}{144 g/mol}\times 100=79.16\%$

Total mass of hydrogen hexafluorosilicate = m'

$79.16\%=\frac{25,434 g}{m'}\times 100$

m' = 32,127.02 g

32,127.02 grams of hydrogen hexafluorosilicate will contain this 25,434 grams of F.

5 0

2 years ago

The Chandra X ray Observatory

AlladinOne [14]

The statement that describes NASA's Chandra X-ray Observatory is a space telescope.

Explanation:

Usually telescopes are used by the astronomer's to find objects which are placed in far places.

But Chandra X-ray observatory is the NASA's space telescope.

This telescope is used to find and discover advanced X-rays which are produced in the space due to explosion of stars, clusters and the matter around black hole in the hot regions.

Therefore, this NASA's Chandra X-ray Observatory is a space telescope.

6 0

3 years ago

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