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3 years ago

Look at the diagram. Which shows the correct arrangement of electrons in water?

Chemistry

2 answers:

mariarad [96]3 years ago

6 0

Answer:

Option 4

Explanation:

In water molecule, oxygen has -2 charge on it while the hydrogen has +1 charge and one atom of oxygen combines with two hydrogen atoms. A hydrogen need only two electrons to complete its octet (one electron is its own the second electron is shared by oxygen) and a oxygen needs 8 electrons (It has six of its own and two are shared by two hydrogen atom).

Hence, option 4 is correct

Ad libitum [116K]3 years ago

4 0

Answer:

Option 2

It's more balanced than the others

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The stage in which the hair begins to destroy itself as it disconnects from the

Fittoniya [83]

A food worker has an earache he is scheduled to work.

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3 years ago

One liter of a solution ph 9 has how many more hydroxide ions (oh-) than 1 l of a solution of ph 4?

NeX [460]

100,000 times more. The rule is that the product of the concentration of (H+) and (OH-) in molars is always 10^-14 (if it is more, they combine and produce simple water which brings the product back down to this number again. If it is less, water molecules will split to bring the product back up to equilibrium).
pH 9 means (H+) is 10^-9 molar. But that means (OH-) is 10^-5 at the same time.
pH 4 means (H+) is 10^-4 molar. But that means (OH-) is 10^-10 at the same time.
10^-5 / 10^-10 = 10^5 or 100,000 times more.

4 0

4 years ago

Below is a list of terms used in characterizing solutions. Enter the correct term for each sentence. Note that not all of the te

AlladinOne [14]

Answer:

molality, mole fraction, solvent, solute, molarity.

Explanation:

The expression of concentration that provides the moles of solute per kilograms of solvent is molality.

$b=\frac{n_{solute}}{m_{solvent}(kg)}$

If you place 5 moles of sodium chloride and 4 moles of sucrose into 11 moles of water, the mole fraction of sodium chloride would be 0.25

$X(NaCl)=\frac{molesNaCl}{moles_{solution}} =\frac{5mol}{20mol} =0.25$

A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the solvent is water.

The solvent is the component in major proportion and the one that defines the state of the solution.

A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the solute is sodium chloride.

The solute is the component in minor proportion.

A way to express concentration that provides the moles of solute per liter of solution is molarity.

$M=\frac{n_{solute}}{V_{solution}(L)}$

3 0

3 years ago

what is the molarity of a solution formed by mixing 10.0 g og h2so4 with enough water to make 0.100 l solution

tamaranim1 [39]

H₂SO4:

m=10g
M=98g/mol

n = m / M

n = 10g / 98g/mol = 0,102mol
V=0,1L

Cm = n / V = 0,102mol / 0,1L = 1,02M

4 0

3 years ago

What is the major ion in seawater?

Dmitrij [34]

Answer:

It should be chloride I am almost positive

Explanation:

Typical Seawater

Chloride (Cl-) 18.980

Sodium (Na+) 10.556

Sulfate (SO42-) 2.649

Magnesium (Mg2+) 1.262

4 0

3 years ago