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Klio2033 [76]
3 years ago
10

Heyyyyyyy......................

Chemistry
2 answers:
Maksim231197 [3]3 years ago
6 0

Answer:

hiiii

Explanation:

natita [175]3 years ago
4 0

Answer:

helllllooooooo hi how is life

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What is the difference between atom and it’s ion ?
Sati [7]
Answer:
D. Number of electrons
8 0
4 years ago
Explain why a strong acid must have a weak conjugate base
mojhsa [17]

Explanation:

The specie produced when a strong acid is dissociated in water along with the proton is the conjugate base of that acid.

Consider a strong acid such as HCl which donates the proton so readily as it is a strong base and there is no tendency for conjugate base, which is Cl^- to re accept that proton.  

A strong base is the one which accepts proton and holds it firmly. Thus, the strong acid has weak conjugate base.

4 0
3 years ago
Outline the steps needed to determine the limiting reactant when 30.0 g of propane, C3H8, is burned with 75.0 g of oxygen.
kumpel [21]

Answer : The limiting reactant is O_2

Explanation : Given,

Mass of C_3H_8 = 30.0 g

Mass of O_2 = 75.0 g

Molar mass of C_3H_8 = 44 g/mole

Molar mass of O_2 = 32 g/mole

First we have to calculate the moles of C_3H_8 and O_2.

\text{ Moles of }C_3H_8=\frac{\text{ Mass of }C_3H_8}{\text{ Molar mass of }C_3H_8}=\frac{30.0g}{44g/mole}=0.682moles

\text{ Moles of }O_2=\frac{\text{ Mass of }O_2}{\text{ Molar mass of }O_2}=\frac{75.0g}{32g/mole}=2.34moles

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

C_3H_8+5O_2\rightarrow 3CO_2+4H_2O

From the balanced reaction we conclude that

As, 5 mole of O_2 react with 1 mole of C_3H_8

So, 2.34 moles of O_2 react with \frac{2.34}{5}\times 1=0.468 moles of C_3H_8

From this we conclude that, C_3H_8 is an excess reagent because the given moles are greater than the required moles and O_2 is a limiting reagent and it limits the formation of product.

Therefore, the limiting reactant is O_2

5 0
3 years ago
What is meant by the term specific heat?
Alex73 [517]

Answer:

the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

8 0
3 years ago
3. Which part of Thomson's plum pudding model was different from Rutherford's model?
horsena [70]

Answer:

The difference between the Thompson's plum pudding model and the Rutherford atom model is the location of the electrons (option a).

Explanation:

While Thompson compared his atom to a plum pudding, where the electrons floated freely in the pudding, Rutherford established the arrangement of the electrons in orbitals, which were found around the atomic nucleus like the planets around the sun.

Rutherford's findings also established the existence of a small, positively charged nucleus.

<em>Thompson and Rutherford models did not differentiate between the charges of electrons and protons , overall charges or overall size of the atom.</em>

8 0
3 years ago
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