A

Chemistry

1 answer:

s344n2d4d5 [400]2 years ago

5 0

Answer:

The change in energy is 1.023 J.

Explanation:

The formula for Kinetic Energy is $\frac{1}{2} mv^{2}$

The formula for Potential Energy is $mgh$

In the above question, the hammer has an initial Kinetic Energy which hits the anvil loses some energy and rises up to gain potential energy.

Initial Kinetic Energy= $\frac{1}{2} * 3 * 1.5^{2}$

=3.375 J

Potential Energy it gains after rising the particular height= 3*9.8*0.08

=2.352 J

Therefore, the difference in energy is 1.023 J.

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Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4. A. CH3OH < CH4 < CH3Cl < RbCl B. R

rosijanka [135]

Answer:

E. CH₄ < CH₃Cl < CH₃OH < RbCl

Explanation:

The molecule with the stronger intermolecular forces will have the higher boiling point.

The order of strength of intermolecular forces (strongest first) is

Ion-Ion
Hydrogen bonding
Dipole-dipole
London dispersion

RbCl is a compound of a metal and a nonmetal. It is an ionic compound, so it has the highest boiling point.

CH₃Cl has a C-Cl polar covalent bond. It has dipole-dipole forces, so it has the second lowest boiling point.

CH₃OH has an O-H bond. It has hydrogen bonding, so it has the second highest boiling point.

CH₄ has nonpolar covalent C-H bonds. It has only nonpolar bonds, so the only attractive forces are London dispersion forces. It has the lowest boiling point.

Thus, the order of increasing boiling points is

CH₄ < CH₃Cl < CH₃OH < RbCl

4 0

2 years ago

You try to measure out exactly 5.0 milliliters of water by eye into each of five test tubes. When you go back to check the volum

jeka94

Answer:

The volumes are both, accurate and precise.

Explanation:

In the measurement of a set, precision refers to how much coincidence exists in the measurements of an specific value, as the measurements are close, we can say the volumes are precise.

Accuracy means the agreement that exists between the average of one

large series of measurements and the value of measurement

Media is 4,96 ml and I wanted to measure 5 ml. It is also close.

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2 years ago

On the graph, which shows the potential energy curve of two N atoms, carefully sketch a curve that corresponds to the potential

ki77a [65]

Answer:

Explanation:

We are to carefully sketch a curve that relates to the potential energy of two O atoms versus the distance between their nuclei.

From the diagram, O2 have higher potential energy than the N2 molecule. Because on the periodic table, the atomic size increases from left to right on across the period, thus O2 posses a larger atomic size than N2 atom.

Therefore, the bond length formation between the two O atoms will be larger compared to that of the two N atoms.