can you help please??

Answer:

B)They have the same kinetic energy but different gravitational potential energies.

Explanation:

I don't know the exact explanation but I just took the test.

Answer:

Explanation:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquidIt is water's chemical composition and physical attributes that make it such an excellent solvent. Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge. This allows the water molecule to become attracted to many other different types of molecules. Water can become so heavily attracted to a different compound, like salt (NaCl), that it can disrupt the attractive forces that hold the sodium and chloride in the salt compound together and, thus, dissolve it.

Answer:

103.4 moles of hydrogen

Explanation:

Given data:

Moles of C₁₂H₂₂O₁₁ = 4.70 mol

Number of moles of hydrogen present = ?

Solution:

one mole of C₁₂H₂₂O₁₁  contain 22 moles of hydrogen. Thus in order to determine total number of moles in 4.70 moles of C₁₂H₂₂O₁₁ we will multiply the 22 moles of hydrogen with 4.70 moles of C₁₂H₂₂O₁₁.

1 mole of C₁₂H₂₂O₁₁ = 22 moles of Hydrogen

4.70  × 22 moles

103.4 moles of hydrogen

Answer:

(m1+m2)v

Explanation:

where m1 is the mass of the first body

m2 is the mass of the second body

v is the velocity

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{562}{72} \\ = 7.80555555...[/tex]

We have the final answer as

Hope this helps you

Answer:

r

Explanation:

Answer:

Sharing of electrons such that each atom attains an octet

Taking into account the definition of electronic configuration and the Aufbau principle, in an atom with the electron configuration of 1s²2s²2p⁶3s¹, there are 11 electrons.

The electronic configuration of elements is the arrangement of all the electrons of an element in energy levels and sublevels (orbitals).

There are 7 energy levels, numbered from 1 to 7, and in which the electrons are distributed, logically, in order according to their energy level. Electrons with less energy will spin at level 1.

Each level is divided into sublevels. These sublevels into which each level is divided can be up to 4. These 4 sublevels are called: s, p, d, f.

In the s sublevel there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the d sublevel 10 electrons and finally in the f sublevel there can be a maximum of 14 electrons.

At level 1 there is only one sublevel, which will be the s. In level 2 there are 2 sublevels, the s and the p. At level 3 there are 3 sublevels s, p and d. And in level 4 there are 4 sublevels, the s, the p, the d and the f.

The Aufbau principle is a principle of atomic physics, which explains how electrons arrange themselves in their orbits around the nucleus of the atom.

This principle states that the filling of these orbitals occurs in order of increasing energy, that is, from orbitals of lower energy to those of higher energy.

The simplest of the sublevels is 1. If you fill the 1s, you can start filling the 2s. Once the 2s sublevel is satisfied, the 2p can start filling, and so on.

In this case, in an atom with the electron configuration of 1s²2s²2p⁶3s¹, there are 2+2+6+1= 11 electrons.

Learn more about an electronic configuration of an atom:

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#SPJ1

Answer:

Newton's third law

Explanation:

A fish swimming uses its fins to push the water backward making it swim forward is obeying Newton's third law of motion.

Newton's third law of motion states that "action and reaction are equal and opposite".

When the fish uses its fin to push the water backward, it reacts by being propelled in the opposite direction which is in the forward sense.

The third law is clear indicator that forces are always in pairs. As the fish swims, a net force between the oppositely directed forces do not cancel out.

Answer: the accepted value for the density of aluminum

Explanation:

took the test

Answer:

Most metals are malleable and ductile because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond.

Answer:

Look below:

Explanation:

This is because their atoms can roll over each other into new positions without breaking the metallic bonds.

Answer:

positively charged nucleons are 24

Explanation:

Given element:

           ₂₄⁵⁰ Cr

The superscript before the symbol of the atoms is mass number

The subscript before the symbol is the atomic number

  Cr is the symbol of the atom

Now,

Atomic number is the number of protons in an atom.

The protons are the positively charged particles in an atom.

For this specie, the positively charged nucleons are 24

Answer:

CaCl2 + H2O

Explanation:

Noble gas configuration for Li : [He]2s¹

In an atom, there are levels of energy in the shell and sub-shell

This energy level is expressed in the form of electron configurations.

Lithium with atomic number 3, then the electron configuration:

1s²2s¹

And for noble gas configuration or it can be called Condensed electron configurations :

[He]2s¹

Answer:

[He]2s¹

Explanation:

Answer:

Na and Cl

Explanation:

An ionic compound is solid at state room temperature. Therefore Na and Cl would be the correct answer :)

Answer:

Gas

Explanation:

Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.

Answer:

Physical

Explanation:

Water is the only known substance on Earth that exists naturally in three states: solid, liquid, and gas. To change between these states, water must undergo physical changes.. Hydrogen and oxygen are gases at standard temperature and pressure, whereas water is a colorless, odorless liquid

Answer:

When you add so much solute that no more dissolves you have a SATURATED SOLUTION.

Answer:

iIt is called as point of saturation or saturated solution

Answer:

the time taken for the radioactivity of a specified isotope to fall to half its original value.

Answer:

Nomenclature Rules

Explanation:

Answer: Its actually the geneva rules

Explanation:

Answer:

Over time he discovered that the Moon-like phases of Venus demonstrated that the neighboring planet had an orbit independent of Earth. This showed conclusively that Venus circled the Sun, as Copernicus thought, not Earth, as Ptolemy thought. But it did not yet prove conclusively that Earth circled the Sun.

Answer: Option #3 or C. Jupiter has moons orbiting it.

Explanation:  Galieo found moons of Jupiter, conflicting with teachings of Aristotle and Ptolemy.

So the correct answer is option # 3 or C. Did it on Edge got it right! :)

Question: What is some of the evidence used by Galileo to support Copernicus’s model and disprove Aristotle and Ptolemy’s?

Options Given:

A. Each planet spins in an epicycle.

B. Planets appear to move backward.

C. Jupiter has moons orbiting it.

D. The religious and cultural beliefs supported this model.

d. Ba₃(PO₄)₂(s)+6HNO₃(aq)

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product  

To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur  

Because A precipitate is formed, then compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ + are generally included in the insoluble compound

So the reaction :

3Ba(NO₃)₂(aq)+2H₃PO₄(aq)⇒Ba₃(PO₄)₂(s)+6HNO₃(aq)

A precipitate is formed ⇒ Ba₃(PO₄)₂

Answer:for my ap3x test the answer was the molecular formula

Explanation:

Ap3x

Answer:

the molecular formula

a p e x

Answer:

See explanation

Explanation:

Atomic size increases down the group due to the addition of more shells.

As more shells are added and repulsion of inner electrons become more significant, atomic size increases down the group. However, across the period, atomic size decreases due to increase in effective nuclear charge without any increase in the number of shells. This causes increased attraction between the nucleus and the outermost shell thereby decreasing the size of the atom.

Ionization energy decreases down the group because the outermost electron is more shielded by inner electrons making it easier for this outermost electron to be lost. Across the period, ionization energy increases due to increase in effective nuclear charge which makes it more difficult to remove the outermost electron due to increased nuclear attraction.

The right options is a cation and an anion !

Answer:

1.4 L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) = 1.3 L

Initial temperature (T1) = 280 K

Final temperature (T2) = 303 K

Final volume (V2) =?

With the above data, we can obtain the new volume of the gas by using the Charles' law equation as shown below:

V1 /T1 = V2 /T2

1.3/280 = V2 /303

Cross multiply

280 × V2 = 1.3 × 303

280 × V2 = 393.9

Divide both side by 280

V2 = 393.9/280

V2 = 1.4 L

Thus, the new volume of the gas is 1.4 L

Answer:

3.38 moles of O2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

4CH2OH + 5O2 → 4CO2 + 6H2O

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Finally, we shall determine the number of mole of O2 needed to react with 2.7 moles of CH2OH. This can be obtained as follow:

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Therefore, 2.7 moles of CH2OH will require = (2.7 × 5)/4 = 3.38 moles of O2 for complete combustion.

Thus, 3.38 moles of O2 is required.

Answer:

Individual organisms live together in an ecosystem and depend on one another. In fact, they have many different types of interactions with each other, and many of these interactions are critical for their survival. ... One category of interactions describes the different ways organisms obtain their food and energy.