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3 years ago

PLEASE HELP!! :')

1 answer:

3 0

box cooker: I'd cook something small like a chicken since it takes longer to cook things with a box cooker (3 hours oh lord)

Parabolic cooker: I would cook something like hot dogs or steak since it's great for grilling at high temperatures

Concentrator cooker: same answer for the parabolic cooker since they are kind of the same thing, they cook fast :)

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How many moles are in 150g of argon gas?

Keith_Richards [23]

Molar mass Argon = 39.948 g/mol

number of moles = mass solute / molar mass

n = 150 / 39.948

n = 3.7548 moles

hope this helps!

4 0

3 years ago

When 551. mg of a certain molecular compound X are dissolved in 100 g of benzonitrile (CH,CN), the freezing point of the solutio

Ludmilka [50]

Answer:

M1 = 49.04 g/mol

Explanation:

The pure benzonitrile has freezing point -12.8°C. By adding a nonvolatile compound, the freezing point will be changed, a process called cryoscopy. The freezing point will be reduced. In this case, the new freezing point is -13.4°C. The variation at the temperature can be calculated by the equation:

ΔT = Kc*W*i

Where ΔT is the variation at the freezing temperature (without the solute less with the solute), Kc is the cryoscopy constant (5.34 for benzonitrile), W is the molality, and i the Van't Hoff correction factor, which is 1 for benzonitrile.

((-12.8-(-13.4)) = 5.34*W

5.34W = 0.6

W = 0.1124 mol/kg

W = m1/M1*m2

Where m1 is the mass of the solute (in g), M1 is the molar mass of the solute (in g/mol), and m2 is the mass of the solvent (in kg).

m1 = 0.551 g, m2 = 0.1 kg

0.1124 = 0.551/M1*0.1

0.01124M1 = 0.551

M1 = 49.04 g/mol

7 0

3 years ago

What is the correct unabbreviated electron configuration of the following?:

Rudik [331]

The correct unabbreviated electron configuration is as below

Vanadium - 1S2 2S2 2P6 3S2 3p6 3d3 4s2

Strontium - 1s2 2S2 2P6 3S2 3P6 3d10 4S2 4P6 4S2

Carbon =1S2 2S2 2P2

Explanation

vanadium is in atomic number 23 in the periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d3 4s2

Strontium is in atomic number 38 in periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4s2

Carbon is in atomic number 6 in periodic table therefore its electron configuration is 1s2 2s2 2p2

5 0

4 years ago

Which type of mixture can be separated using magnetism?

Tasya [4]

You can separate mixtures that have magnetic components. The reason is because you can use magnetism to separate out the magnetic components.

3 0

4 years ago

What determines the temperature of an object at the molecular level?

Temka [501]

At the molecular level, temperature is related to the random motions of the particles (atoms and molecules) in matter. Because there are different types of motion, the particles' kinetic energy (energy of motion) can take different forms, and each form contributes to the total kinetic energy of the particles.

7 0

3 years ago