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Nat2105 [25]
3 years ago
12

Helpppppppppppppppppppppp

Chemistry
2 answers:
Masteriza [31]3 years ago
8 0
Oxygen has 6
Neon has 8
Sodium has 1
Aluminum has 3
Silicon has 4
Calcium has 2
Arsenic has 5
Astatine has 7

In order would be: Sodium, Calcium, Aluminum, Silicon, Arsenic, Oxygen, Astatine, Neon
lys-0071 [83]3 years ago
3 0
Neon, astatine, oxygen,arsenic, silicon, aluminum,calcium, sodium
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Solutions of sodium sulfate and silver nitrate are mixed together.
Vera_Pavlovna [14]

Answer:

<em>The correct option is a) Precipitate: silver sulfate </em>

<em> </em>

<em>Net Ionic: 2Ag+ +  SO42 →Ag2SO4</em>

Explanation:

When sodium sulfate reacts with silver nitrate, the following reaction occurs:

2AgNO3 + Na2SO4  → Ag2SO4 + 2NaNO3

The NaNO3 is easily soluble in water. However, silver ions form an insoluble solid with SO4. The Ag+ in this compound will be a cation having a positive charge. The SO4- will be an anion having an negative charge.

The table with solubility rules show that the sulfates of  Ag+, Ca+, Sr2+, Ba2+, Hg22+ and Pb2+ are insoluble.

5 0
3 years ago
What is the structural formula for 2-methyl 3-ethylbutane?
ivann1987 [24]

Answer:

Explanation:

2-methyl-3-ethylpentane | C8H18 | ChemSpider.

Boiling Point: 115.3±7.0 °C at 760 mmHg

Molecular Formula: C8H18

Density: 0.7±0.1 g/cm 3

Enthalpy of Vaporization: 32.9±0.0 kJ/mol

4 0
3 years ago
Hydrogen gas is collected over water in an inverted buret. If the atmospheric pressure is 745 mm Hg, the vapor pressure of water
Varvara68 [4.7K]

Answer:

P_{H_2}=727mmHg

Explanation:

Hello there!

In this case, according to the given data, it is possible to infer that the gas mixture lies on the 15.0 cm-high column of water, so that the total pressure or atmospheric pressure is given by:

P_{atm}=P_{water}+P_{H_2}

Thus, since the atmospheric pressure is 745 mmHg and the vapor pressure of water is 18 mmHg, the pressure of hydrogen turns out to be:

P_{H_2}=P_{atm}-P_{water}\\\\P_{H_2}=745mmHg-18mmHg\\\\P_{H_2}=727mmHg

Best regards!

6 0
3 years ago
Both coal and diamonds are forms of elemental carbon. Coal is brittle while diamonds are considered to be the hardest of all sub
iragen [17]
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How many neutrons does the most common isotope of hydrogen have?
Alexandra [31]
1 becuse its all it can hold
8 0
3 years ago
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