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3 years ago

14

How do oil spills affect marine ecosystems?

1 answer:

charle [14.2K]3 years ago

3 0

Oil makes it impossible for fur-bearing mammals to insulate<span>, this leaves them unprotected from the harsh elements out in the water. Birds and mammals will die from hypothermia without the ability to insulate from the freezing water.

I hope this helps you! :-)</span>

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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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4 years ago

How many grams of magnesium oxide are needed to produce 264g of magnesium hydroxide

Archy [21]

If its one part magnesium and two parts hydroxide id say 88g of magnesium

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3 years ago

Which of the situations below describes an ethical dilemma related

fredd [130]

Answer: C

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3 years ago

What is the element name for 2,2

Strike441 [17]

Answer:

Helium

Explanation:

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3 years ago

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Blank are produced when atoms if the elements in group 7A blank an electron

Romashka [77]

Answer:

Halide ions are produced when atoms of elements in Group 7A gain an electron.

Explanation:

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3 years ago