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3 years ago

3. Why do atoms form covalent molecules!

Chemistry

1 answer:

Contact [7]3 years ago

8 0

Answer:

To stabilize themselves by sharing of electrons, mostly obey octate rule to complete their shells.

Explanation:

Understood... Each thing in this universe want to be stabilize, including you!

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A 25.00-mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1322 M KOH solution. A volume of 41.22 mL o

NISA [10]

<u>Answer:</u> The concentration of $H_2SO_4$ comes out to be 0.109 M.

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given y neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=2\\M_1=?M\\V_1=25.00mL\\n_2=1\\M_2=0.1322M\\V_2=41.22mL$

Putting values in above equation, we get:

$2\times M_1\times 25=1\times 0.1322\times 41.22\\\\M_1=0.109M$

Hence, the concentration of $H_2SO_4$ comes out to be 0.109 M

4 0

3 years ago

The equation that represents this reaction is Pb(NO3)2(aq) + 2 KI(aq) arrow PbI2(s) + 2 KNO3(aq). In what ways does this equatio

o-na [289]

Answer: The number of atoms remain constant and thus the mass also remains conserved.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

$Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)$

In product side , $2KNO_3$ there are 2 atoms of potassium, 2 atoms of nitrogen and 6 oxygen atoms. In $PbI_2$ there is 1 atom of lead and 2 atoms of iodine.

In reactant side , $Pb(NO_3)_2$ there are 2 atoms of nitrogen, 6 oxygen atoms and 1 atom of lead. In $2KI$ there are 2 atoms of potassium and 2 atoms of iodine.

Thus the number of atoms remain constant and thus the mass also remains conserved.

3 0

3 years ago

Read 2 more answers

How does a balanced chemical equation satisfy the law of conservation of mass

ELEN [110]

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. ... When an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced.

4 0

3 years ago

HELPPPP PLEASEEEEEE !!!

krek1111 [17]

$_{93}^{238}Ne---\ \textgreater \ _{-1}^{0}e + _{94}^{238}Pu

When electron leaves a nucleus positive charge will increase
93-(-1)=94

Mass 238 is not changed because mass of electron counted as 0

238 =0 + 238.$

3 0

3 years ago

It is known that 32g of oxygen takes up 24 litres of space at 25oC. Calculate the volume of oxygen that is needed to react compl

Gwar [14]

6 L of oxygen (O₂)

Explanation:

We have the following chemical reaction:

2 Mg + O₂ → 2 MgO

Now we calculate the number of moles of magnesium:

number of moles = mass / molar weight

number of moles of Mg = 12 / 24 = 0.5 moles

Taking in account the chemical reaction we devise the following reasoning:

if 2 moles of Mg react with 1 mole of O₂

then 0.5 moles of Mg react with X moles of O₂

X = (0.5 × 1) / 2 = 0.25 mole of O₂

mass = number of moles × molar weight

mass of O₂ = 0.25 × 32 = 8 g

Knowing the information given by the problem that 32 g of O₂ takes up 24 liters of space, we devise the following reasoning:

if 32 g of O₂ takes up 24 liters of space

then 8 g of O₂ takes up Y liters of space

Y = (8 × 24) / 32 = 6 L of O₂

Learn more about:

balancing chemical reactions

brainly.com/question/14187466

#learnwithBrainly

4 0

3 years ago