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3 years ago

Solve for C using the equation c=a/b when a=4.7 and b= 1.3

2 answers:

5 0

C = about 3.62 because when you divide 4.7 over 3.1 you get 3.61538461538 and f you round it to the nearest hundredth place it is 3.62

viva [34]3 years ago

5 0

Your answer would be 3.62 if u round it to the nearest hundredth

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the atomic number tells you the number of _______ in one atom of an element. It also tells you the number of ______ in a neutral

uysha [10]

Answer:

Protons, electrons, same in that order is the answer.

Explanation:

this has to do with the periodic table information.

5 0

3 years ago

Which atom absorbs more energy, one in which an electron moves from the second shell to the third shell or an otherwise identica

Assoli18 [71]

Answer:

identical atom in which an electron moves from the first to the third shell.

Atoms may occupy different energy states. The energy states are discrete, i.e. they occur at specific values only. Therefore an atom can only move to a new energy level if it absorbs or emits an amount of energy that exactly corresponds to the difference between two energy levels.

The lowest possible energy level that the atom can occupy is called the ground state. This is the energy state that would be considered normal for the atom.

An excited state is an energy level of an atom, ion, or molecule in which an electron is at a higher energy level than its ground state.

An electron is normally in its ground state, the lowest energy state available. After absorbing energy, it may jump from the ground state to a higher energy level, called an excited state.

3 0

3 years ago

Given 0.500 moles of H₂, how many grams of NH₃ would be produced?

Allisa [31]

Answer:

0.333 mol NH₃

Explanation:

N₂ + 3 H₂ ⇆ 2 NH₃

This is the reaction that produces NH₃. Use the mole ratios to solve. For every 3 moles of H₂ that are consumed, 2 moles of NH₃ are produced.

(0.500 mol H₂) × (2 mol NH₃/3 mol H₂) = 0.333 mol NH₃

You will produce 0.333 moles of NH₃.

4 0

3 years ago

Which molecular solid would have the highest melting point?

TEA [102]

Answer:

Choice B. The solid with hydrogen bonding.

Assumption: the molecules in the four choices are of similar sizes.

Explanation:

Molecules in a molecular solid are held intact with intermolecular forces. To melt the solid, it is necessary to overcome these forces. The stronger the intermolecular forces, the more energy will be required to overcome these attractions and melt the solid. That corresponds to a high melting point.

For molecules of similar sizes,

The strength of hydrogen bonding will be stronger than the strength of dipole-dipole attractions.
The strength of dipole-dipole attractions (also known as permanent dipole) will be stronger than the strength of the induced dipole attractions (also known as London Dispersion Forces.)

That is:

Strength of Hydrogen bond > Strength of Dipole-dipole attractions > Strength of Induced dipole attractions.

Accordingly,

Melting point due to Hydrogen bond > Melting point due to Dipole-dipole attractions > Melting point due to Induced Dipole attractions.

Induced dipole is possible between all molecules.
Dipole-dipole force is possible only between polar molecules.
Hydrogen bonds are possible only in molecules that contain $\rm H$ atoms that are bonded directly to atoms of $\rm F$ , $\rm O$ , or $\rm N$ .

As a result, induced dipoles are the only force possible between molecules of the solid in choice C. Assume that the molecules are of similar sizes, such that the strengths of induced dipole are similar for these molecules.

Melting point in choice B > Melting point in choice D > Melting point in choice A and C.

8 0

3 years ago

A mole of any substance contains ___ particles.

Vika [28.1K]

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.

7 0

3 years ago