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allsm [11]
3 years ago
8

Which phrase is the best description of weathering?

Chemistry
1 answer:
Anit [1.1K]3 years ago
8 0
I just had this question it is c
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What volume in dm3 of KCl is obtained in the following equation ??
Ivan

Answer: Volume of KCl is 0.0752dm^3

Explanation: For the given reaction,

2KClO_3(s)\rightarrow 2KCl(s)+3O_2(g)

We can see that 2 moles of KClO_3 is giving 2 moles of KCl. So, the number of moles of KCl will be 2.

Mass of KCl can be calculated by,

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

Molar mass of KCl = 74.5 g/mol.

Number of Moles = 2

\text{Given mass}= Moles\times \text{Molar Mass}

Given mass = 149g

Now, to calculate the Volume of KCl, we will use the density formula,

\rho =\frac{Mass}{Volume}

\text{Specific density of KCl}(\rho)=1.98g/cm^{3}

Mass = 149g (Calculated above)

Putting the values in density formula, we get

1.98g/cm^3=\frac{149g}{Volume}

\text{Volume of KCl}=75.252cm^3

Conversion Factor: 1cm^3=10^{-3}dm^3

Volume of KCl in dm^3=0.0752dm^3

3 0
3 years ago
Read 2 more answers
Pleasee help me with this :)
Marysya12 [62]

1) Water And Wind

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3 0
3 years ago
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The aprticles that are lost, gained, or shared in chemical reactions are?
yanalaym [24]
Hello There!

The only particles that can be lost, gained or shared are electrons.
These are negative sub atomic particles. 
A covalent bond is when the electrons are shared.
An Ionic bond is when the electrons are gained or lost.

Hope This Helps You!
Good Luck :) 

- Hannah ❤
6 0
3 years ago
explain why samples of gold and copper can have the same extensive properties, but not the same intensive properties
vivado [14]
Extensive properties, as volume and mass, depend on the amount of material. So, you can have a sample of gold and a sample of copper with the same volume as long as you have different amount of each one.

On the other hand, intensive properties do not depend on the amound of material but on the chemical constitution of the material. Density is an intensive property, so gold and copper have different densities. That is why you can use intensive properties to characterize different materials.
3 0
3 years ago
Please help. It's for chemistry
irinina [24]
What do i help with what
3 0
2 years ago
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