When an atom of oxygen forms an ion, what is the most likely charge for that ion?
a. -2
b. -8
C. +2
d. -6

Answer:

( -, + , + )

Explanation:

The sign of the change in entropy for

High pressure side , low pressure side and the Total of the two =

( -, + , + )

The expansion of the Higher pressure side of the chamber will lead to a negative (- )change in entropy while the contraction of the lower pressure side of the chamber will cause a positive ( + ) increase in the change of entropy

Answer:

Reactions where chemical bonds are broken, releasing the energy in those bonds, are often exergonic reactions.

Explanation:

Reactions where chemical bonds are broken, releasing the energy in those bonds, are often exergonic reactions. These reactions where chemicals are broken down are called “catabolism” – the destructive part of metabolism. By contrast, reactions where chemical bonds are formed are often endergonic.

Answer:

d. condensation of water

Answer:

I believe the answer is D). condensation of water.

Hope this helps, have a great day/night and stay safe!

Answer:

My group believes that Elisa has Staphylococcus Aureus. I think that she does have the manifestation of the colonies condition because she tested positive to clumping factor, coagulase, hemolysins and thermostable deoxyribonuclease, which are used to identify S aureus. Commercial latex agglutination tests conducted on her blood sample also tested positive to the S aureus. For further clarifications, my Group also used biotyping kits for the identification of S epidermidis for commercial confirmation.

However, the catalase test was conducted to distinguish streptococci (catalase-negative) staphylococci which are catalase positive. The test was performed by flooding an agar slant or broth culture with several drops of 3% hydrogen peroxide. Catalase-positive cultures bubble at once.

Explanation:

I have a question, is this in Edge 2020?

And anyway,

Hope this helped! :)

The number of moles : 6.2 x 10¹¹

The mole is the number of particles contained in a substance

1 mole = 6.02.10²³  particles

[tex]\tt N=n\times No[/tex]

N = number of particles

n = moles

No = Avagadro's number : 6.02.10²³

3.73 x 10³⁵ atoms of S

the number of moles :

[tex]\tt \dfrac{N}{No}=\dfrac{3.73\times 10^{35}}{6.02\times 10^{23}}=6.2\times 10^{11}[/tex]

Answer:

obsidian

Explanation:

because it is an igneous rock which is smooth

Answer:

B) Obsidian

Explanation:

Since the igneous glass last not very long like you could say obsidian compared to normal ones.

Answer:

Mass = 13.42 g

Explanation:

Given data:

Molality of potassium chloride solution = 0.721 m

Mass of water = 255 g (255 g /1000 = 0.255 Kg)

Potassium chloride added = ?

Solution:

Molality:

Molality = number of moles of solute/ Kg of solvent

0.721 m = moles / 0.255 Kg

  m = mol/Kg

Moles = 0.721mol/Kg×0.255 Kg

Moles = 0.18 mol

Mass of potassium chloride:

Number of moles = mass/molar mass

0.18 mol = Mass /74.55 g/mol

Mass = 0.18 mol × 74.55 g/mol

Mass = 13.42 g

Answer:

The Bohr model shows that the electrons in atoms are in orbits of differing energy around the nucleus (think of planets orbiting around the sun). ... He said that the energy of an electron is quantized, meaning electrons can have one energy level or another but nothing in between.

Explanation:

Answer:

The sum would be 69109.4944 ml if that's what you were asking

Answer:

1. Si

hope this helped

Answer:

Chlorine has higher Electron Affinity as compared to Bromine

Explanation:

Electron affinity is defined as the Potential energy change of the atom when an electron is added to a neutral gaseous atom. Therefore, more the Negative electron affinity, more favorable will be the electron addition process.

The electron affinity of Chlorine is -349kJmol^-1

The electron affinity of Bromine is -324.6KJmol^-1

This clearly shows that Chlorine is a much better Atom to be bonded with, That is the reason why in the reaction is not feasible.

[tex]Br2(aq) + 2NaCl(aq)[/tex] →[tex]Cl2(aq) + 2NaBr(aq)[/tex]

Therefore, Chlorine has higher electron Affinity as compared to Bromine and that what makes it a much better atom to be bonded with Na. So the above reaction is not possible.

Answer:

A

Explanation:

Answer:

its the first one because all together it has to have ten square things

If u click on all of them it gives u an A+ and doesn’t even read what u wrote. So u never really have to try hard on the writing parts just tell them u included them all

Answer:An image will not be formed.

Rays do not converge to or diverge from a common point.

/select all that apply

Explanation:

Answer:

the shape of a molecule. The shape of a molecule is determined by the location of the nuclei and its electrons. The electrons and the nuclei settle into positions that minimize repulsion and maximize

Explanation:

hope this helped

Mass of sodium carbonate = 7.022 g

Reaction

Na₂CO₃ + 2HNO₃ ⇒ 2NaNO₃ + H₂O + CO₂

mol of HNO₃ (MW=63,01 g/mol):

[tex]\tt mol=\dfrac{8.35}{63.01}=0.1325[/tex]

mol Na₂CO₃

[tex]\tt \dfrac{1}{2}\times 0.1325=0.06625[/tex]

mass Na₂CO₃(MW = 105,9888 g/mol) :

[tex]\tt 0.06625\times 105,9888 g/mol=7.022~g[/tex]

The mass of sodium carbonate that is required for complete reaction with 8.35 grams of nitric acid is equal to 7.02 grams.

Given the following data:

Scientific data:

To determine the mass of sodium carbonate that is required for complete reaction with 8.35 grams of nitric acid:

First of all, we would write the properly balanced chemical equation for this chemical reaction:

                        [tex]Na_2CO_3 + 2HNO_3 \rightarrow 2NaNO_3 + H_2O + CO_2[/tex]

Next, we would find the number of moles of nitric acid ([tex]HNO_3[/tex]) required:

[tex]Number\;of\;moles = \frac{Mass}{molar\;mass}\\\\Number\;of\;moles = \frac{8.35}{63 }[/tex]

Number of moles = 0.1325 moles.

By stoichiometry:

2 moles of [tex]HNO_3[/tex] = 1 mole of [tex]Na_2CO_3[/tex]

0.1325 moles of [tex]HNO_3[/tex] = X mole of [tex]Na_2CO_3[/tex]

Cross-multiplying, we have:

[tex]2X=0.1325\\\\X=\frac{0.1325}{2}[/tex]

X = 0.0663 moles

Now, we can determine the mass of sodium carbonate that is required:

[tex]Mass = Number\;of\;moles \times molar\;mass\\\\Mass = 0.0663 \times 106[/tex]

Mass of [tex]HNO_3[/tex] = 7.02 grams

Read more: https://brainly.com/question/16906167

Answer:

a substance that can be dissolved by a solvent to create a solution

Explanation:

Answer:

the minor component in a solution dissolved in a solvent

Answer:

answers

1. 3

2. Symbol

3. I cant see it

4.Chemical Equation

Explanation:

O3 means 3 atoms in oxygen

symbol because elements need symbols

Answer:

4.C, 5.D, 6.A, 7.A ,and is 8.A

Answer:

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation.

Answer:

1. 40 grams of NaCI

2. 20 grams of Barium Peroxide

Explanation:

For Question 1, there are 400 grams of NaCI. There are 10 drops.

So, we have to divide 400 by 10.

We get 40 as our result, so 40 is the answer.

There are 800 grams of barium peroxide, and there are 40 drops.

So, we divide 800 by 40.

We have the answer as 20.

Our final answers are going to be listed below:

Hope this helps you!

*Make proportions to solve. Find the rate from the question 1.

Question 1 is 40.

There are 400 grams of NaCI. There are 10 drops.

Divide 400 by 10.

400 / 10 = 40

40 is the answer.

Now all we do is repeat the same process for question 2.

Question 2 is 20.

There are 800 grams of barium peroxide, and there are 40 drops.

Divide 800 by 40.

800 / 40 = 20

Answer = 20.

Answer:

2Fe + 3Cl=2FeCl3 therefore the coefficent for Fe is 2.

Explanation:

Atoms form molecules. A molecule is a chemical structure consisting of at least two atoms held together by one or more chemical bonds. ... All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms.

Answer:

Explanation: Atoms form molecules. A molecule is a chemical structure consisting of at least two atoms held together by one or more chemical bonds. ... All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms.

Answer:

6.02 X 1023 atoms of oxygen.

Explanation:

One mole of atoms of oxygen has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains 6.02 X 1023 atoms of oxygen.

the number of oxygen atoms an oxygen molecule has is two oxygen atoms

Answer:

1.67 M

Explanation:

The following data were obtained from the question:

Initial volume (V1) of solution = 250 mL

Initial Molarity (M1) of solution = 0.5 M

Final volume (V2) of solution = 75 mL

Final Molarity (M2) of solution =?

Thus, we can obtain the final molarity of the solution by using the following formula:

M1V1 = M2V2

0.5 × 250 = M2 × 75

125 = M2 × 75

Divide both side by 75

M2 = 125 /75

M2 = 1.67 M

Thus, the new Molarity of the solution is 1.67 M.

Answer: In fact, all of the major landforms that we find on the continents ... Mid-ocean ridges, also called seafloor-spreading centers, are long, ... 1 km = 100,000 cm or 1 x 105 cm ... a mid-ocean ridge with a SLOW spreading rate (1 to 5 cm/yr, full rate).

Explanation:

As the Earth's tectonic plates separate, new ocean bottom is generated along divergent plate borders, which are known as mid-ocean ridges. Massive basalt volcanic eruptions result from molten rock rising to the seafloor as the plates divide.

To learn more about Mid-ocean ridge, refer to:

https://brainly.com/question/1288447

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Answer:

Germanium

Explanation:

Answer:

It is the intermolecular forces acting between the molecules that cause attractions between them making them liquids or solids. The strength of Van der Waals forces depends primarily on the number of electrons in total in the molecule, so larger molecules will have higher boiling points.

Explanation: