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3 years ago

What is convection, conduction, and radiation explained? Please help fast

Chemistry

1 answer:

harina [27]3 years ago

3 0

Answer:

While conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves. The matter is present around us, in three states, solid, liquid and gas.

Explanation:

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A group of students is setting up a test to see whether earthworms, like those shown in the photo, prefer rough or smooth surfac

kotykmax [81]

Answer:

they like smooth

Explanation:

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3 years ago

Which is a FALSE statement about the possible benefits of nanocars? A. They could work together to build really complex things.

kondor19780726 [428]

C, they could work together to make things from the top down.

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4 years ago

1) What is the mass of 6.2 mol of K2CO3?

lorasvet [3.4K]

Answer:

$\boxed {\boxed {\sf 856.8648 \ grams \ of \ K_2CO_3}}$

Explanation:

To convert from moles to grams, we must find the molar mass.

1. Molar Mass

First, identify the elements in the compound. K₂CO₃ It has potassium, carbon, and oxygen. Find these elements and their masses on the Periodic Table.

K: 39.098 g/mol
C: 12.011 g/mol
O: 15.999 g/mol

Note the subscript of 2 after K and 3 after O. We must multiply oxygen's molar mass by 2, then oxygen's by 3, and add carbon.

2(39.098 g/mol) + 3(15.999 g/mol) + 12.011 g/mol= 138.204 g/mol

2. Convert Moles to Grams

Use the molar mass as a fraction.

$\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}$

Multiply by the given number of moles: 6.2

$6.2 \ mol \ K_2CO_3 *\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}$

$6.2 *\frac {138.204 \ g \ K_2CO_3}{1 }$

$6.2 * {138.204 \ g \ K_2CO_3}$

$856.8648 \ g \ K_2CO_3$

There are <u>856.8648 grams</u> of potassium carbonate in 6.2 moles.

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3 years ago

.Cut up paper burns much more rapidly than an equivalent single piece of wood because of its...

tankabanditka [31]

Answer:

different reactants

Explanation:

because if you think about it what's really thick and it takes a lot longer to burn a piece of paper is super fit material which can just tear real easily just by ripping it with your fingers so if you think about it how fast it burns it's not how big the molecules are because paper has smaller molecules than wood would so the paper burns faster in differently so it's probably the reactant it's made of

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3 years ago

In ____________, electrons are gained by atoms and lost by others

Nat2105 [25]

In ions atoms lose and gain electrons

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3 years ago

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