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3 years ago

The loess hills of Iowa are a great example of _____.

1 answer:

4 0

The loess hills are a formation of wind-deposited loess soil in the westernmost or Iowa and Missouri along the Missouri river

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My culture and food questions

daser333 [38]

Answer:

I cant really help you, because it depends on your culture not mine and they ask you about your favorite food so its basically based on your opinion

and i dont know your familiy do's and dont's

Explanation:

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3 years ago

What is the Wt% of SiO2 in augite?<br><br> (Ca, Fe, Mg, Na)(Mg,Fe,Al) (Si,Al)2 O6

vaieri [72.5K]

Answer:

The weight% of $SiO_2$ in augite is 13.16 %.

Explanation:

Atomic mass of calcium = 40 g/mol

Atomic mass of iron = 56 g/mol

Atomic mass of magnesium = 24 g/mol

Atomic mass of sodium = 23 g/mol

Atomic mass of aluminum = 27 g/mol

Atomic mass of silicon = 28 g/mol

Atomic mass of oxygen = 16 g/mol

Mass of $SiO_2=28 g/mol+ 2\time 16 g/mol=60 g/mol$

Molar mass of the augite $(Ca, Fe, Mg, Na)(Mg,Fe,Al)(Si,Al)_2 O_6$ = M

$M=40 g/mol+2\times 56 g/mol+2\times 24 g/mol+23 g/mol+3\times 27 g/mol+2\times 28 g/mol+6\times 16 g/mol=456 g/mol$

Weight% of $SiO_2$ in augite:

$w\%=\frac{60 g/mol}{456 g/mol}\times 100=13.16\%$

3 0

3 years ago

PLEASE HELp !!!!!! Explain how melting ice caps will throw the global ecosystem out of balance ?

lana [24]

Answer:

Water level increase, animals that live on ice caps adapt or die, food chain thrown off etc.

3 0

3 years ago

Based on the chart above, the countries with the lowest human development are located on which continent __________.

cricket20 [7]

Answer:

Africa is the only country having lowest human development

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3 years ago

Read 2 more answers

Spheres called_________orbit the_____

Mashcka [7]

Answer:

planets, sun

Explanation:

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3 years ago