2 years ago

HELP!!

1 answer:

8 0

Answer: In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Explanation:

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of the following warnings, which one refers to a chemical property of a substance? fragile flammable handle with care shake well

coldgirl [10]

Flammable is ur answer

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3 years ago

PLZ HELP Question 14 of 25 What is the name for a representation of the physical world?

JulijaS [17]

Answer:

Model

Explanation:

A model of anything is something you make to represent it in it's physical world form

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2 years ago

A certain substance X has a normal freezing point of -6.4 C and a molal freezing point depression constant Kf= 3.96 degrees C.kg

Brut [27]

Answer: $1.0\times 10^2g$

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=(-6.4-(13.6))^0C=7.2^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte like urea)

$K_f$ = freezing point constant = $3.96^0C/m$

m= molality

$\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}}\times \text{weight of solvent in kg}}$

Weight of solvent (X)= 950 g = 0.95 kg

Molar mass of non electrolyte (urea) = 60.06 g/mol

Mass of non electrolyte (urea) added = ?

$7.2=1\times 3.96\times \frac{xg}{60.06 g/mol\times 0.95kg}$

$x=1.0\times 10^2g$

Thus $1.0\times 10^2g$ urea was dissolved.

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3 years ago

The properties of the hydrogen atom form the basis for all life. True False

Maurinko [17]

False, the hydrogen atom does not form the basis for all life.

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2 years ago

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6. (1 point) What is the correct formula for sodium sulfate? *

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6) Na2 SO4
7)nonmetallic elements
10)mass
11) mole
* sorry I didn't know Q. 8/9

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3 years ago

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