If an atom has 6 protons and 5 neutrons, what is its mass? _________ amu

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Answer 1

Answer:

Answer:An atom has 5 protons, 5 electrons and 6 neutrons The atomic number = number of protons = number of electrons = 5 The mass number = 5 protons + 6 neutrons = 11

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How do hydrogen bonds between water molecules occur?

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Hydrogen bonds between water molecules occur because of the polarity of the water molecule.

A hydrogen bond is a weak bond that forms between a hydrogen atom that is covalently bonded to a highly electronegative atom and another highly electronegative atom in the same or a different molecule.

A water molecule consists of two hydrogen atoms and one oxygen atom. The hydrogen atoms are bonded to the oxygen atom, but the electrons in the covalent bonds are not shared equally. This results in a partial negative charge on the oxygen atom and a partial positive charge on the hydrogen atoms.

When two water molecules are close together, the partial positive charge on one hydrogen atom is attracted to the partial negative charge on the oxygen atom of the other molecule. This attraction is called a hydrogen bond.

Therefore, due to polarity of the water molecule, it results into hydrogen bonds between water molecules.

Learn more about hydrogen bond here:

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Hydrogen bonds between water molecules occur through the attraction of hydrogen atoms and oxygen atoms of water molecules. For example, one water molecule's hydrogen atom will bond with the oxygen atom of another water molecule.

Nuclear fission produces about one-fifth the power in the United States. An unintended positive consequences of nuclear power has been that A) a lot of power is generated. B) radioactive waste is created. C) less greenhouse gases are created. D) nuclear power plants are targets for terrorists.

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answer is C) less green house gases are created

Answer:

Explanation: i did it and it wasn't c it was b

Show a numerical setup for calculating the percent by mass of NaCl in the solution inbeaker 4.

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Let's think about the solution first: it's composed of water (100 g) and 35.04 grams of NaCl (in beaker for)

together it's 100+35.04=135.04

and NaCl in this solution is 35.04/135.04=25.95.

So the answer is 25.95

Mass Percentage Definition. Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%.
% mass = [( 35.04) / ( 100 + 35.04)] * 100
% mass = 25.95 %

Base your answer on the information below. A 1.0-gram strip of zinc is reacted with hydrochloric acid in a test tube. The unbalanced equation below represents the reaction. ____ Zn(s) + ____HCl(aq) ____H2(g) + ____ ZnCl2(aq) Balance the equation for the reaction of zinc and hydrochloric acid, using the smallest whole-number coefficients.

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the answer is in the picture.

A chemistry student must separate should barium sulfate from the aqueous solution. Equipment and glassware normally found in the chemistry classroom are available to the student.Describe how the student could separate the solid barium from the aqueous solution. Be sure to list the lab equipment needed to do the procedure
Explain how each item is used in the procedure
List any safety equipment needed and how it is used in the procedure
Describe how this procedure might be used in a situation outside the chemistry classroom

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If there's just some barium put in an aqueous solution, then it should be something like this.
It's a mixture of a solution and an insoluble solid, so the easiest way to go is through filtration. (Also, I'm assuming the barium is cut into very small chips.)

In a line, simply filter the solution using a folded filter paper in a funnel, collect the residue in a beaker or flask, rinse it with distilled water and let it dry. (Or simply filtering it could be enough, depending on how far your teacher wants you to go.)

Stuff needed:
>filter paper (for separating the solid from the solution)
>funnel (to hold the filter paper)
>beaker or flask (to hold the filtrate)
>distilled water (to rinse the solid)
>spatula (to scoop up the solid)

Procedure:
>Fold filter paper and line the funnel with it. Place the funnel in the flask or beaker.
>Pour solution in. Then add water (I think using tap water might be fine in this case, but you can use distilled water if you'd like) to wash out the container with the solution of any solid you may have not gotten in the first try. Alternatively, you could use a spatula to spoon it onto the filter paper.
>Once everything has been filtered, pour some distilled water on the residue on the filter paper to wash away the solution.
>Take out the filter paper, open it up and let it dry.

This can be used in real life in many occasions. For example, when you make tea, you need to filter the leaves out. Or when you cook the pasta, you put it in a sieve to separate the pasta from the water. Or when you fish using fishing nets, you "filter" the fish from the water.

Calculate the pH of a solution that is 0.111 M HCl. PH=?

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HCl(aq) ------> H⁺(aq) + Cl(aq)
↓ ↓ ↓
i : 0.111 M 0 0
v: - 0.111 M +0.111 M +0.111 M
_______________________________
eq: 0 +0.111 M +0.111 M

HCl is a strong acid, so it ionizes 100% in solution :

PH = - log [ H+]

PH = - log [ 0.111]

PH = 0.9546

hope this helps!

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When a mixture of iron powder and sulphur is heated it glows more brightly than that of iron filings and sulphur.Explain this observation