Why do think there is often only a short amount of time to evacuate an area before an earthquake?

1 answer:

3 0

Earthquakes can cause massive distruction that can even cause death. In order to prevent any damage done to you, you must leave the scene immediatly, especially since an earthquake can tear down houses and buildings

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Which of the following will reduce copper?<br> zinc<br> mercury<br> fluorine<br> chlorine

laiz [17]

Zinc because the only metals that would be able to reduce copper ions in solution would be hydrogen, lead, tin, nickel, iron, zinc, aluminum, Magnesium, sodium, calcium, potassium, and lithium. and according to your answer choices Zinc is the answer.

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3 years ago

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How much states have in united states

Gemiola [76]

Answer:

there are 50 states in the United States

Explanation:

you look at a map and count after that you count Alaska and Hawaii and you have 50

states

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2 years ago

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Identify the choice that best completes the statement or answers the question.

DanielleElmas [232]

The answer would be decomposers

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3 years ago

Calculate the mass in grams for 0.251 moles of Na2CO3

Len [333]

Answer:

Explanation:

the molar mass for Na2CO3 is 2*23+12+3*16=106 g/mole

106*0.251=26.606 grames

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3 years ago

You complete a chemical reaction and recover 79 grams of product. However, you calculate you should have recovered 104 grams of

spin [16.1K]

Percent yield is calculated using:
$percent \: yield = \frac{actual \: yield}{theoretical \: yield} \times 100\%$

Your actual yield is how much you actually had at the end of the experiment = 79g.

Your theoretical yield is how much you calculated you should have gotten in an ideal, perfect experiment = 104g.

So put those values into the equation:
$percent \: yield = \frac{79}{104} \times 100\% = 76\%$

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3 years ago