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VashaNatasha [74]

3 years ago

15

Overall, what is happening to the birth rates around the world?A. IncreasingB. DecreasingC. Unchanged

1 answer:

Vsevolod [243]3 years ago

4 0

Answer:

B. Decreasing

Explanation:

Birth rates in the United States have dropped for the fifth year in a row, reaching a new low for the past 35 years, according to a report from the U.S. Centers for Disease Control and Prevention. Once again, Americans are not having enough babies to replace the existing population.

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Help me please<br>describe Lotte Worlds in your own words

denis23 [38]

Answer:

fun and

Explanation:

it has many tourist attractions

4 0

3 years ago

The longest mountain range in North Africa is what?

lozanna [386]

<span>southern great escarpment</span>

8 0

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

4 years ago

True or False: Earthquakes are waves of energy that travel across earths surface. (explain)

kondor19780726 [428]

The answer is true bc earthquakes are caused by seismic waves in the earth and that happen all over the world.

8 0

3 years ago

Why do millions of tourists flock to the northeast every year?

Aloiza [94]

A, tourists do not go to work or visit farms or work in the factories , they go to visit its world-famous cities .

8 0

4 years ago

Read 2 more answers