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3 years ago

Why can scientists ignore the forces of attraction between particles in a gas under ordinary conditions

1 answer:

3 0

Scientists ignore the forces of attraction between particles in a gas under ordinary conditions because the particles in a gas are apart and moving fast, rather than clustered and moving slow, therefore the forces of attraction are too weak to have a visible effect.

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Given: 2AgNO3 + NiCl2 -> 2AgCl + Ni(NO3)2

serious [3.7K]

Answer: AgNO3 is the limiting reactant.

Explanation:

1) Balanced chemical equation:

Given: 2AgNO3 + NiCl2 → 2AgCl + Ni(NO3)2

2) Mole ratios:

2 mol AgNO3 : 1 mol NiCl2 : 2 mol AgCl : 1 mol Ni(NO3)2

3) Convert 0.847 g of AgNO3 to moles

n = mass in grams / molar mass

molar mass = sum of the masses of all the atoms in the molecular formula

molar mass of AgNO3 = 107.9 g/mol + 14.0 g/mol + 3*16.0 g/mol = 169.9 g/mol

n = 0.847 g / 169.9 g/mol = 0.00499 mol AgNO3

4) Convert 0.650 g of NiCl2 to moles

n = mass in grams / molar mass

molar mass NiCl2 = 58.7 g/mol + 2*35.5 g/mol = 129.7 g/mol

n = 0.650 g / 129.7 g/mol = 0.00501 mol NiCl2

5) Compare the theoretical mole ratio with the actual ratio:

Theoretical mole ratio: 2 mol AgNO3 / 1 mol NiCl2
Actual ratio: 0.00499 mol AgNO3 / 0.00501 mol Ni Cl2 ≈ 1:1

Therefore, the amount of AgNO3 is half the required amount need to react with all the NiCl2, which means that the AgNO3 will react completely and there will be an excess of NiCl2. The reactant that is consumed completely while the other is left, is the limiting reactan. This is, AgNO3 is the limiting reactant.

6 0

4 years ago

What type of rock is quartzite

Ilya [14]

Quartzite is a nonfoliated metamorphic rock

6 0

3 years ago

Carmen lives on a farm in an area far away from the city and surround by forests. New families are starting to move into the are

lidiya [134]

Answer:

Carmen and her family would not have to interest crops where the land has very little rapid recovery after one always, or even in those productions where their neighbors produce the same, the ideal would be the cultivation of trees to make wood, or crops where the harvest is fast and the land can regenerate quickly.

Explanation:

Within the fields, agricultural competition is very important, since it tends to happen within commerce or in rural areas, generating diversity of productions among farmers.

7 0

3 years ago

What best describes the collisions between ideal gas molecules?

Serggg [28]

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.

5 0

4 years ago

Examine these two MSDS from different manufacturers for sodium hydroxide (NaOH). Compare and contrast the following aspects: che

SCORPION-xisa [38]

Answer:

In #1) Chemical Name: Sodium hydroxide, Chemical Formula: Na OH, Synonyms: Caustic soda, Sodium hydrate. General: Corrosive to metals and tissue. Noncombustible solid. Soluble in water. When in contact with water, may generate sufficient heat to ignite combustible materials.Health Hazard: Strong corrosive action on contacted skin. Causes eye and skin burns. Causes digestive and respiratory tract burns. Reactivity: Water, acids, flammable liquids, metals such as aluminum, tin, and zinc.Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider the material's impact on air quality, potential migration in soil or water, effects on animal and plant life, and conformance with environmental and public health regulations.

#2) Product Name: Sodium hydroxide, pellets

Chemical Name: Sodium Hydroxide

Synonyms: Lye, Caustic soda, Soda lye

G H S-US

Signal Word: Danger

Hazard Statement: H 314 - Causes severe skin burns and eye damage

Precautionary Statements:

P 260 - Do not breathe mist, spray, or vapors.

P 264 - Wash exposed skin thoroughly after handling.

P 280 - Wear eye protection, face protection, protective clothing, and protective gloves.

P 301+P 330+P 331 - IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P 303+P 361+P 353 - IF ON SKIN: Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.

P 305+P 351+P 338 – IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing

P 310 - Immediately call a poison center or doctor/physician.

P 363 - Wash contaminated clothing before reuse.

P 405 - Store locked up.

P 501 - Dispose of contents/container to comply with local, state, and federal regulations

IF INHALED: Remove person to fresh air and keep comfortable for breathing

Health Hazard: Causes severe burns to eyes, skin, and mucus membranes.

Target Organs: Eyes, skin, respiratory system

Hazard Summary: When dissolved in water or neutralized with acid, it liberates substantial heat, which may be sufficient to ignite combustible materials. Sodium hydroxide is very corrosive.

Waste Disposal: Waste must be disposed of in accordance with federal, state, and local environmental control regulations.

Explanation:

I just did this by stating what I observed then copy and pasted the info it asked for the only one I didn't get was order of compounds. Anyways hope this helps.

8 0

4 years ago