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jolli1 [7]
3 years ago
11

When a substance dissolves, it undergoes a _____.

Chemistry
2 answers:
babunello [35]3 years ago
7 0
A physical change.  chemical changes require the molecule itself to change.  If you put NaCl into solution, the NaCl is still there which is evident by the fact that if you lower the amount of water, NaCl precipitates out.
Viefleur [7K]3 years ago
7 0

The answer is a physical change. Hope this helps and have an amazing day. :)

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Canadian chemists have developed a modern variation of the 1899 Mond process for preparing extremely pure metallic nickel. A sam
Gnoma [55]

There are 1952.31g of nickel can be converted to the carbonyl with 3.55 m³ of CO at 100.7 kPa.

Given data

The reaction can be written as:

Ni+4CO ⟶Ni(CO)_{4}

V(CO)=3.55m^{3}

T=50°C=323.5K

p=100700Pa

Now, use the formula:

pV=nR*T  

Where, P is pressure, V is volume and T is temperature.                         n=p∗V / R∗T

n=100700∗3.55  / 8.314∗323.15

It is known that,

n(CO)=133.059mol                            

n(Ni)=n(CO)/4=33.26mol

Mass can be determined by the formula:

Mole = mass / molar mass

Now, put the value of given data in above formula:

m(Ni)=nAr=33.26mol/58.69g/mol      

m(Ni)=1952.31g

To know more about carbonyl here

brainly.com/question/22211758

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3 0
2 years ago
Do atoms of a specific element contain the same number of protons
monitta

Answer:

No, they don't because of fact some way more than the other even if it's the same type of element.

Explanation:

There are two types of element weight I think.

5 0
3 years ago
Read 2 more answers
Calculate the volume (in cm³) of 935 grams of steel. The density of steel is 7.8 g/cm³. Give your answer to 2 decimal places.
Effectus [21]

Answer:

<h2>119.87 cm³</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question we have

volume =  \frac{935}{7.8}  \\  = 119.871794...

We have the final answer as

<h3>119.87 cm³ to two decimal places</h3>

Hope this helps you

7 0
3 years ago
What happens to the energy level of particles when melting occurs
Alenkinab [10]

Answer:

Melting occurs when a solid is heated and turns to liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place. Typically, during melting, the particles start to move about, staying close to their neighboring particles, then move more freely.

Explanation:

7 0
4 years ago
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What three important factors contribute to the United States' high GDP
makkiz [27]
Abundant Natural Resources, Advanced Technology, and Highly Skilled Workers are important factors contribute to the United States' high GDP.

6 0
3 years ago
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