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3 years ago

Which is the best example and explanation that a physical change has occurred?

Chemistry

1 answer:

Feliz [49]3 years ago

7 0

Rip King von like to send love to their family 63-63= von

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If the mass of one or two spheres increases, how does it affect the gravity between the two spheres?

Lunna [17]

If one mass is greater then the other then it will attract to the one with the bigger mass. Its affected by the size

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3 years ago

Consider the following unbalanced chemical equation. C5H12(l) + O2(g) → CO2(g) + H2O(l) If 21.9 grams of pentane (C5H12) are bur

Marina CMI [18]

Answer : The mass of water produced will be 32.78 grams.

Explanation : Given,

Mass of $C_5H_{12}$ = 21.9 g

Molar mass of $C_5H_{12}$ = 72.15 g/mole

Molar mass of $H_2O$ = 18 g/mole

First we have to calculate the moles of $C_5H_{12}$ .

$\text{Moles of }C_5H_{12}=\frac{\text{Mass of }C_5H_{12}}{\text{Molar mass of }C_5H_{12}}=\frac{21.9g}{72.15g/mole}=0.3035moles$

Now we have to calculate the moles of $H_2O$ .

The balanced chemical reaction will be,

$C_5H_{12}(l)+8O_2(g)\rightarrow 5CO_2(g)+6H_2O(l)$

From the balanced reaction we conclude that

As, 1 mole of $C_5H_{12}$ react to give 6 moles of $H_2O$

So, 0.3035 moles of $C_5H_{12}$ react to give $0.3035\times 6=1.821$ moles of $H_2O$

Now we have to calculate the mass of $H_2O$ .

$\text{Mass of }H_2O=\text{Moles of }H_2O\times \text{Molar mass of }H_2O$

$\text{Mass of }H_2O=(1.821mole)\times (18g/mole)=32.78g$

Therefore, the mass of water produced will be 32.78 grams.

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3 years ago

What is the boiling point of kerosene

dexar [7]

Answer: The boiling point of kerosene ranges from around 150 to 300 degrees Celsius normally being closer to 300 degrees Celsius.

Explanation:

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3 years ago

Is glass breaking physical or a chemical

serg [7]

Answer:

<h2>physical </h2>

Explanation:

I hope this helps

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3 years ago

The layers of earth are the crust, mantle, and core, with the core being divided into inner and outer layers. Which of the follo

Westkost [7]

Answer:

C- The core is made up of dense elements, such as iron and nickel.

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3 years ago