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3 years ago

QUICK! Which best explains how the collisions of materials in space contribute to the formation of layers in protoplanets?

Chemistry

1 answer:

Pani-rosa [81]3 years ago

5 0

Answer:

B. The collisions release heat, which results in the heating and subsequent melting, sinking, and rising of materials.

Explanation:

Got it correct on edge

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Study figure 8-1. when the ionic compound KI is dissolved in water, the I- ions are pulled into the solution by the attraction b

Wittaler [7]

Answer is: D. The I⁻ ion and the positive end of a water molecule.

Dissociation of potassium iodide in water:

KI(aq) → K⁺(aq) + I⁻(aq).

Solvation is the interaction of solvent (water) with molecules or ions (in this example K⁺ and I⁻) in a solute.

Anion I⁻ has negative charge, so positive end (hydrogen atoms) of a water molecul attracts them.

Solvent (usually a liquid, but can also be a solid or a gas) is a substance that dissolves a solute.

5 0

3 years ago

Read 2 more answers

The table below gives the atomic mass and relative abundance values for the three isotopes of element M.

Serhud [2]

The average atomic mass formula is:

$average atomic mass = \Sigma (percent abundane)\times (atomic mass)$

Substituting the values in the formula:

$average atomic mass = \frac{78.99\times 23.9850+10\times 24.9858+11.01\times 25.9826}{100}$

$average atomic mass = \frac{1894.57515+249.858+286.068426}{100}$

$average atomic mass = 24.30516 amu$

Hence, $24.30516 amu$ is the average atomic mass of element M.

7 0

3 years ago

Which of the following is an example of a change from gravitational potential

Elenna [48]

Answer:

The speed of a roller coaster increases as gravity pulls it downhill and is greatest at its lowest point. Viewed in terms of energy, the roller-coaster-Earth system's gravitational potential energy is converted to kinetic energy

6 0

3 years ago

Read 2 more answers

What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine?

tensa zangetsu [6.8K]

Answer:

$Q=-76.7kJ$

Explanation:

Hello,

In this case, for such formation of sulfur hexafluoride, the standard enthalpy of formation is -1220.47 kJ/mol (data extracted from NIST database). Next, we compute the moles in 10.0 grams of sulfur hexafluoride as shown below:

$n_{SF_6}=10.0gSF_6*\frac{1molSF_6}{146.06 gSF_6}=0.0685mol$

Next, for the given energy, we compute the total heat that is liberated:

$Q=-1220.47\frac{kJ}{mol}*0.0685 mol\\\\Q=-76.7kJ$

Finally, we conclude such symbol has sense since negative heat is related with liberated heat.

Best regards.

8 0

3 years ago

Energy that is lost as heat

Tema [17]

Can still be used to do work

3 0

3 years ago