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2 years ago

What element has the electron configuration below? * please help me

Chemistry

1 answer:

timofeeve [1]2 years ago

8 0

Answer:

Symbol Ar

Group 18

Electron configuration- 1s² 2s² 3p6 3s² 3p6

Explanation:

The 6 is small and will be placed in top but I don't have the option that's why I wrote like that

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Which if the following sentences is not true about nitrogen gas at room temperature

Ivan

Answer:

Bud your answer would be D.

Hope that helps.

4 0

3 years ago

True or false daltons atomic theory stated that matter is mostly empty space

Bas_tet [7]

The answer is false. Because Daltons theory stated that the Atom was a solid ball.

3 0

3 years ago

What is a network solid

vladimir2022 [97]

Answer:

A network solid or covalent network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.

Explanation:

4 0

3 years ago

Calculate the number of pounds of CO2 released into the atmosphere when a 22.0 gallon tank of gasoline is burned in an automobil

IrinaK [193]

Answer:

391.28771 pounds of carbon-dioxide released into the atmosphere.

Explanation:

Density of the gasoline ,d= 0.692 g/mL

Volume of gasoline in an tanks,V = 22.0 gallons = 83,279.02 mL

Let mass of the gasolin be M

$d=\frac{M}{V}$

M = V × d = 83,279.02 mL × 0.692 g/mL=57,629.081 g

Assume that gasoline is primarily octane (given)

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

Mass of octane burnt in the tank = M = 57,629.081 g

Moles of octane = $\frac{57,629.081 g}{114.08 g/mol}=505.1637 mol$

According to reaction, 2 moles of octane gives 16 moles of carbon-dioxide.

Then 505.1637 mol of octane will give:

$\frac{16}{2}\times 505.1637 mol=4,041.3100 mol$ of carbon-dioxide

Mass of 4,041.3100 mol of carbon-dioxide:

4,041.3100 mol × 44.01 g/mol = 177,858.05 g

Mass of carbon-dioxide produced in pounds = 391.28771 pounds

391.28771 pounds of carbon-dioxide released into the atmosphe

4 0

3 years ago

2(x+2) -4(2x-3)=4(2x-1)

rodikova [14]

Answer:

x = 10/7

Explanation:

2(x + 2) - 4(2x - 3) = 4(2x - 1),

2x + 4 - 8x + 12 = 8x - 4,

-6x + 16 = 8x - 4,

20 = 14x,

x = 20/14 or 10/7

8 0

2 years ago