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alex41 [277]
4 years ago
7

Adjacent water molecules interact through the ________. a. sharing of electrons between the hydrogen of one water molecule and t

he oxygen of another water molecule b. electrical attraction between the hydrogen atoms of adjacent water molecules c. electrical attraction between the hydrogen of one water molecule and the oxygen of another water molecule d. sharing of electrons between adjacent oxygen molecules
Chemistry
1 answer:
Yakvenalex [24]4 years ago
7 0

Answer: Option (c) is the correct answer.

Explanation:

A water molecule is made up of two hydrogen atoms and one oxygen atom. Due to the difference in electronegativity of hydrogen and oxygen, the electrons are pulled more towards oxygen atom.

As a result, a partial positive charge will develop on hydrogen atom and a partial negative charge will develop on oxygen atom.

Thus, we can conclude that adjacent water molecules interact through the  electrical attraction between the hydrogen of one water molecule and the oxygen of another water molecule.

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Why are lead compounds harmful to us?
Dominik [7]

Explanation:

Lead can cause effects on the blood, as well as the nervous, immune, renal and cardiovascular systems. ... Exposure to high amounts of lead can cause gastrointestinal symptoms, severely damage the brain and kidneys, and may cause reproductive effects. Large doses of some lead compounds have caused cancer in lab animals.

6 0
3 years ago
In words, write out a description of the reaction Na+Cl2=NaCl
ipn [44]
This chemical equation is unbalanced. You must add a 2 in front of Na on the left side and a 2 in front of the Na on the right side.
4 0
4 years ago
How many grams of magnesium oxide can be produced if 25.0 g of magnesium are allowed to react with 28 g of oxygen?
Ivanshal [37]

Answer : The mass of MgO produced is, 41.68 grams.

Explanation : Given,

Mass of Mg = 25.0 g

Mass of O_2 = 28 g

Molar mass of Mg = 24 g/mol

Molar mass of O_2 = 32  g/mol

First we have to calculate the moles of Mg and O_2.

\text{Moles of }Mg=\frac{\text{Given mass }Mg}{\text{Molar mass }Mg}

\text{Moles of }Mg=\frac{25.0g}{24g/mol}=1.042mol

and,

\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}

\text{Moles of }O_2=\frac{28g}{32g/mol}=0.875mol

Now we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

2Mg+O_2\rightarrow 2MgO

From the balanced reaction we conclude that

As, 2 mole of Mg react with 1 mole of O_2

So, 1.042 moles of Mg react with \frac{1.042}{2}=0.521 moles of O_2

From this we conclude that, O_2 is an excess reagent because the given moles are greater than the required moles and Mg is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of MgO

From the reaction, we conclude that

As, 2 mole of Mg react to give 2 mole of MgO

So, 1.042 mole of Mg react to give 1.042 mole of MgO

Now we have to calculate the mass of MgO

\text{ Mass of }MgO=\text{ Moles of }MgO\times \text{ Molar mass of }MgO

Molar mass of MgO = 40 g/mole

\text{ Mass of }MgO=(1.042moles)\times (40g/mole)=41.68g

Therefore, the mass of MgO produced is, 41.68 grams.

4 0
4 years ago
Caffeine has the molecular formula, C8H10N4O2. What is the percent composition of caffeine?
Paul [167]

Answer:

b) 49.48% C, 5.19% H, 28.85% N, and 16.48% O

Explanation:

According to this question, caffeine has a molecular formula of C8H10N4O2. In order to find the percentage composition of each element in this compound, we must first find the molar mass of the compound:

C8H10N4O2

Where; C = 12, H = 1, N = 14, O = 16

12(8) + 1(10) + 14(4) + 16(2)

96 + 10 + 56 + 32

194g/mol

Next, we find the percent composition of each element as follows by dividing mass of each element by molar mass of the compound and multiplying by 100

C = 96/194 × 100 = 49.48%

H = 10/194 × 100 = 5.15%

N = 56/194 × 100 = 28.86%

O = 32/194 × 100 = 16.49%

6 0
3 years ago
Give reasons 1)copper utensils and sheets become blackish after some days
LenaWriter [7]
Copper reacts with the oxygen in the air and this is known as oxidation and is a chemical change . The copper reacts with oxygen and gets oxidised to form a blackish coating on the sheet. Cu+O2->CuO..
This is a combination reaction. #answerwithquality #BAL
6 0
3 years ago
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