1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Aloiza [94]
3 years ago
12

In class we made salt crystals. To do this we put a supersaturated solution of salt into a glass of water. After a few days the

water evaporated and the salt crystals were left on the paper cutouts. When the salt dissolved in the water was this a physical change or a chemical reaction? Please explain your answer in detail.
Chemistry
2 answers:
USPshnik [31]3 years ago
8 0
This is a physical change since the state of matter is the only thing that changed
VashaNatasha [74]3 years ago
6 0

Answer:

<em>Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.</em>

Explanation: Please give me brainliest.

You might be interested in
A sodium hydroxide solution is made by mixing 8.70 g NaOH with 100 g of water. The resulting solution has a density of 1.087 g/m
Ahat [919]

Answer:

Mass fraction = 0.08004

Mole fraction = 0.0377

Explanation:

Given, Mass of NaOH = 8.70 g

Mass of solution = 8.70 + 100 g = 108.70 g

Mass\ fraction\ of\ NaOH=\frac {8.70}{108.70} = 0.08004

Molar mass of NaOH = 39.997 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{8.70\ g}{39.997\ g/mol}

Moles\ of\ NaOH= 0.2175\ mol

Given, Mass of water = 100 g

Molar mass of water = 18.0153 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{100\ g}{18.0153\ g/mol}

Moles\ of\ water= 5.5508\ mol

So, according to definition of mole fraction:

Mole\ fraction\ of\ NaOH=\frac {n_{NaOH}}{n_{NaOH}+n_{water}}

Mole\ fraction\ of\ NaOH=\frac {0.2175}{0.2175+5.5508}=0.0377

3 0
3 years ago
PLEASE JOIN MY AMONG US GAME THE CODE IS QUVNDF
skad [1K]

Answer:

Is it still live?

Explanation:

I wanna play?

3 0
3 years ago
Which of the following is a constant for 1 mole of any ideal gas
Sveta_85 [38]
What are the options? but the constants I know for sure are 22.4L the molar mass of an ion . I just need to know the options 
5 0
3 years ago
Read 2 more answers
How do i find a ionic formula? <br><br>for example Ca2+ &amp; S2-​
jeka94

Example #1 write the chemical formula for Calcium Oxide

Step 1

-Find the Atomic symbol of the metal and non-metal on the periodic table

CaO

Step 2

Find the charges for Calcium and Oxygen

which are Ca 2+ and O 2-

Step 3

Balance out the charges

They are already balanced out

Here´s the chemical formula for Calcium Oxide

CaO

Example 2 write the chemical formula for Aluminum Oxide

Step 1

-Find the Atomic symbol of the metal and non-metal on the periodic table

A

l

O

Step 2

Find the charges for Aluminum and Oxygen

Which are Al 3+ and O 2-

Step 3

Balance out the charges

You need 2 Aluminum and 3 Oxygen to balance the charges

Al 3+ O 2-

Al 3+ O 2-

= 6 + O 2-

= 6-

Step 4

If you need more then one element to balance out the charges you identify that by using subscripts

Heres your chemical formula for Aluminum Oxide

Al_{2} O_{3}

8 0
3 years ago
HELP HELP HELP HELP!!!!!!
suter [353]

Answer:

I think it is 100 if I guess

8 0
3 years ago
Other questions:
  • A typical aspirin tablet contains 327 mg of acetylsalicylic acid, HC9H7O4. Calculate the pH of a solution that is prepared by di
    9·1 answer
  • A general term for an attractive force that holds two atoms together is known as an
    14·2 answers
  • Which element has 1s2s2p3s3p electron configuration?
    7·2 answers
  • Convert 25.1 cal to J
    9·1 answer
  • What is the density of an object with the density of 3 when cut in half?
    6·1 answer
  • What is the name of this molecule?
    15·1 answer
  • ( i need help on this one )
    13·1 answer
  • How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --&gt; 2Al2 O32
    11·1 answer
  • One idea for avoiding a catastrophic collision of space debris with Earth is the use of missile-like projectiles to knock the ob
    8·1 answer
  • How many grams are in 9.05 x 1023 atoms of silicon
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!