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3 years ago

6

More than one million Tutsi people in Rwanda were slaughtered by __________ extremists in 1994. A. Hutu B. Muslim C. Mobutu D. B

oer

2 answers:

mixer [17]3 years ago

8 0

Answer:

A. Hutu

Explanation:

i got a 100

Agata [3.3K]3 years ago

4 0

The answer is A. Hutu.

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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

Pls help urgent need !!

olasank [31]

The distribution of fold mountains, as seen in figure 1, are mostly located around areas of tectonic plates surrounding various continents. For example, the Pacific plate, which runs along North America contains a long region of folded mountains along the coast.

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