3 years ago

What is the source of Earth's magnetic field according to what you have read in chapter 222

1 answer:

8 0

Answer:

Scientists know that today the Earth's magnetic field is powered by the solidification of the planet's liquid iron core. The cooling and crystallization of the core stirs up the surrounding liquid iron, creating powerful electric currents that generate a magnetic field stretching far out into space.

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Calculate the mass of CO2 that can be produced if the reaction of 54.0 g of propane and sufficient oxygen has a 64.0% yield.

Oduvanchick [21]

Answer:

103.9 g

Explanation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

First we convert 54.0 g of propane (C₃H₈) into moles, using its molar mass:

54.0 g ÷ 44 g/mol = 1.23 mol C₃H₈

Then we convert 1.23 moles of C₃H₈ into moles of CO₂, using the stoichiometric coefficients:

1.23 mol C₃H₈ * $\frac{3molCO_2}{1molC_3H_8}$ = 3.69 mol CO₂

We convert 3.69 moles of CO₂ into grams, using its molar mass:

3.69 mol CO₂ * 44 g/mol = 162.36 g

And apply the given yield:

162.36 g * 64.0/100 = 103.9 g

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3 years ago

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Musya8 [376]

Rubidium is a alkali metal.

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What must be true for a substance to be able to dissolve in water?

JulsSmile [24]

B. i think not 100% sure

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3 years ago

the half-life of a certain radioisotope is 12 days. how much (mass) of a 60 mg sample will remain after 36 days

bixtya [17]

Answer:3.5

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3 years ago

What is the gram molecular mass of I mole of C3H5(OH)3?

Trava [24]

Answer:

92.09382 grams

Explanation:

Molecular weight of C3H5(OH)3 or grams. The the SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles C3H5(OH)3, or 92.09382 grams.

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2 years ago