Which of the following is based on facts and/ or evidence?

Explanation:

a brittle, High melting solid : option B (MgCl2).

1) H2S

2) H2O

3) I2

weakest to strongest.

hope this helps you.

Answer:

heightens

Explanation:

Answer:

The electrons in an atom can only occupy certain allowed energy levels to a lower one, the excess energy is emitted as a photon of light, with its wavelength dependent on the change in electron energy. This is why an atom can only emit specific wavelengths of light and not every possible wavelength.

Answer:

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Explanation:

sorry sorry sorry sorry sorry

Answer:

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Answer:

Número de moles de cloro en número de moles de NaCl

Explanation:

espero que si sea la correcta

Answer:

huwattt

Explanation:

i can't understand

Answer:

30

Explanation:

yes of courseeee i cant balance with the nearest milligram

Answer:

C3H8(g) + 5O2(g) = 3CO2(g) + 4H2O(g)

Explanation:

Answer:c

=

0.0253 M

Explanation:

Molarity is a measure of a solution's concentration in terms of how many moles of solute it contains per liter of solution.

So, in essence, if you have the number of moles of solute, like you do here, and the total volume of the solution expressed in liters, you can find how many moles of solute you get per liter, i.e. the molarity of the solution.

Keeping in mind the fact that the moles of solute are distributed evenly in any given volume of the solution, you can say that because  

7.98 L

of solution contain  

0.202

moles of solute, which in your case is potassium chloride,  

KCl

,  

1 L

of this solution will contain

1

L

⋅

0.202 moles KCl

7.98

L

=

0.0253 moles KCl

So, if your solution contains  

0.0253

moles of potassium chloride per liter, it follows that its molarity is equal to

c

=

0.0253 M

Here  

M

is equivalent to  

mol/L

, or molar.

The molarity of the solution that contains 0.505 mol KCl in 7.98 L of the solution is 0.0632 moles/L.

Molarity is a measure of a solution concentration in terms of how many moles of solute it contains per liter of solution.

Molarity = Moles of solute / Liters of solution

Its unit is mole/L

Given that a solution contains 0.505 mol KCl in 7.98 L of solution

Moles of solute (KCl) = 0.505 mol

Liters of solution = 7.98 L

Then, the molarity will be

M = [tex]\frac{0.505}{7.98}[/tex]

   = 0.0632 moles/L

Therefore, the molarity of the given solution is 0.0632 moles/L.

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Adhesion is the attraction of molecules of one kind for molecules of a different kind... water is adhesive because the water molecules are attracted to the straw and therefore adhere to it. Thus, adhesive forces are important for sustaining life. This is because of these forces, water can flow up from the roots to the tops of plants to feed the plant, allowing it to move against gravity through plant cells. Another example of why its important that water is adhesive is the movement of water to the tops of trees and the drainage of tears from tear ducts in the corners of your eyes. Or how water droplets stick to the end of the pine needles. These are all examples of adhesion.

Hope this helped you- have a good day bro cya)

Answer:

Both switches must be closed in order for the circuit to be complete and for the bulb to light. (This would indicate the 'armed' status of this burglar alarm.) Magnetic switches come in 2 varieties - "Normally Closed" and "Normally Open". These 2 terms describe the state of the switch when it is NOT being controlled by the magnet.

Explanation:

Answer:

Explanation:

let us see the behaviour of the sub atomic particles

there are many properties of subatomic particles i have listed some of them above .

Answer:

Questions are an essential part of science. ... They state the final question in a way that can be answered by investigation or experiment. A good scientific question is: “What effect does the pH of water have on radish seed germination?” Good scientific questions are defined, measurable, and controllable.

Answer:

Calcium (Ca) is in group 2 and period 4 on the periodic table be because Calcium has 2 valence electrons and 4 electron shell. Thus, calcium is a metal like all other group 2 element.

Explanation:

Explanation:

Ionization is the process by which ions are formed by gain or loss of an electron from an atom or molecule. If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation). Energy may be lost or gained in the formation of an ion.

Answer:

Pot holders are meant to protect your hand from the heat of the pot, and so it would need to be a poor conductor of heat in order to do its job correctly. Silicon dioxide is a solid at room temperature and methanol is a liquid.

Answer:

C.

Explanation:

I search it on Gøogle

Answer:

group 7 atoms react

Explanation:

When a group 7 element takes part in a reaction, its atoms each gain one electron. These atoms form negatively charged ions . The ions have a stable arrangement of electrons, with a complete outer shell.

Answer:

I believe that would be methane! I hope this helps you!

Answer:

methane

Explanation:

The largest component of natural gas is methane, a compound with one carbon atom and four hydrogen atoms (CH4). Natural gas also contains smaller amounts of natural gas liquids (NGL, which are also hydrocarbon gas liquids), and nonhydrocarbon gases, such as carbon dioxide and water vapor.The main component in natural gas is methane. It also has ethane, propane, butane, hydrocarbons.

Answer:

methanol because it is liquid at room temperature which means that it melts at a lower temperature

Silicon dioxide is a solid at room temperature and methanol is a liquid. Silicon dioxide has a higher melting point than methanol because silicon dioxide is solid, and with increasing temperature, it will melt.

Melting point is that point or temperature at which the solid items are converted into liquid, and it changes their atoms and the atoms lose their compactness.

Here, two compounds are given, Silicon dioxide and methanol, the first one is solid at room temperature, so it will need more temperature to melt down and methanol is still liquid at room temperature, so its melting point is low.

Thus, methanol is a liquid while silicon dioxide is a solid at ambient temperature. Because silicon dioxide is a solid and melts at greater temperatures, it has a higher melting point than methanol.

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Answer:

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Answer:

The size of an atom can be estimated by measuring the distance between adjacent atoms in a covalent compound. The covalent radius of a chlorine atom, for example, is half the distance between the nuclei of the atoms in a Cl2 molecule.

Cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons. Nuclear reactors are used to artificially create it.

A radioactive isotope containing cobalt with something like a half-life of 5.2713 centuries is called cobalt-60 (60Co). Nuclear reactors are used to artificially create it. Neutron irradiation of bulk material of the monoisotopic as well as mononuclidic cobalt element 59 Co is necessary for deliberate industrial manufacture.

The accidentally generated 60 Co in the latter instance (inside the absence of additional cobalt) is mostly the product of many phases involving neutron activation on iron isotopes inside the reactor. Cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons.

Therefore,  cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons.

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Answer:

Explanation:

CH4 + 2O2 ==> CO2 + 2H2O

mols CH4 = grams/molar mass

Using the coefficients in the balanced equation, convert mols CH4 to mols CO2.

Now convert mols CO2 to grams. g = mols x molar mass.