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3 years ago

Which transition metals are paramagnetic but can easily form ferromagnetic alloys with other metals?

1 answer:

6 0

Answer: Paramagnetism is most easily observed in the salts of some of the first row transition metals (manganese through nickel). The se metal ions have unpaired electrons in degenerate d orbitals as predicted by Hund's rule and thus exhibit paramagnetism.

Explanation: METALS ARE ELECTRONS

AND PARAMAGNETIC OBSERVES SALT FORST ROWS ONLY

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PLEASE HELP!! ILL MARK BRAINLIST!!

Lynna [10]

Ok I will get a hold on you tomorrow morning to see

8 0

3 years ago

What is the timeline off the big bang theory? -Science

Airida [17]

Answer:

Time Era Temperature Characteristics of the Universe

0 to 10-43 s Big Bang infinite infinitely small, infinitely dense

Primeval fireball

1 force in nature - Supergravity

10-43 s Planck Time 1032 K Earliest known time that can be described by modern physics

2 forces in nature, gravity, GUT

10-35 s End of GUT 1027 K 3 forces in nature, gravity, strong nuclear, electroweak

Quarks and leptons form

(along with their anti-particles)

10-35 to 10-33 s Inflation 1027 K Size of the Universe drastically increased, by factor of 1030to 1040

10-12 s End of unified forces 1015 K 4 forces in nature,

protons and neutrons start forming from quarks

10-7 s Heavy Particle 1014 K proton, neutron production

in full swing

10-4 s Light particle 1012 K electrons and positrons form

100 s (a few minutes)

Nucleosynthesis era 109 - 107 K helium, deuterium, and a few other elements form

380,000 years Recombination (Decoupling) 3000 K Matter and radiation seperate

End of radiation domination, start of matter domination of the Universe

500 million yrs Galaxy formation 10 K galaxies and other large structures form in the universe

14 billion years

or so Now 3 K You are reading this table, that's what's happening.

Explanation:

4 0

3 years ago

A 0.1 gram sample of an unknown liquid is vaporized completely at 70 degrees C to fill a 750mL flask. The pressure is 0.05951atm

Deffense [45]

Answer:

The molar mass of the liquid 62.89 g/mol

Explanation:

Step 1: Data given

Mass of the sample = 0.1 grams

Temperature = 70°C

Volume = 750 mL

Pressure = 0.05951 atm

Step 2: Calculate the number of moles

p*V = n*R*T

n = (p*V)/(R*T)

⇒ with n = the number of moles gas = TO BE DETERMINED

⇒ with p = The pressure = 0.05951 atm

⇒ with V = The volume of the flask = 750 mL = 0.750 L

⇒ with R = The gasconstant = 0.08206 L*atm/K*mol

⇒with T = the temperature = 70 °C = 343 Kelvin

n = (0.05951 *0.750)/(0.08206*343)

n = 0.00159 moles

Step 3: Calculate molar mass

Molar mass = mass / moles

Molar mass =0.1 gram / 0.00159 moles

Molar mass = 62.89 g/mol

The molar mass of the liquid 62.89 g/mol

6 0

3 years ago

What is the difference between extensive and intensive physical properties?

cestrela7 [59]

Extensive properties, such as mass and volume, depend on the amount of matter being measured.Intensive properties, such as density and color, do not depend on the amount of the substance present.Physical properties<span> can be measured without changing a substance's chemical identity.</span>

6 0

4 years ago

Still using the reaction from the video, what is the limiting reagent when 2 moles of Al are reacted

kondaur [170]

The limiting reagent will be Al

<h3>What are limiting reagents?</h3>

They are reagents that limit the quantity of products that are formed in reactions.

From the equation of the reaction:

$4Al + 3O_2 --- > 2Al_2O_3$

The mole ratio of Al to O2 is 4:3.

With 2 moles of Al and 2 moles of O2, Al becomes limiting while O2 is in excess.

With 2 moles of O2, the amount of Al required should be:

2 x 4/3 = 2.67 moles.

With 2 moles of Al, the amount of O2 required should be:

2 x 3/4 = 1.5 moles

Thus, O2 is in excess by 0.5 moles.

More on limiting reagents can be found here: brainly.com/question/11848702

#SPJ1

8 0

2 years ago