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
Arada [10]
3 years ago
7

The melting point of table salt is 801 degrees C. Is this a physical or chemical property?

Chemistry
1 answer:
Naya [18.7K]3 years ago
3 0
<span>This is a physical property. Physical properties involve changes of phase, or state of matter, of which melting is an example. Melting involves a change from a solid state to a liquid state. The internal energy of the solid increases, usually by applying heat, which increases the temperature to the melting point of the substance.</span>
You might be interested in
Help! Which of these is a compound?:<br>Carbon, chlorine, uranium, ammonia.
MrRa [10]
Ammonia is the compound.
4 0
3 years ago
How do scientists take instruments for measurement up to about 100,000 feet of
uranmaximum [27]
Answer: b
can’t be weather balloons cuz they would pop.
satellites are used for different things
no jet










4 0
2 years ago
...hheeelppppp plzzz?? ​
TEA [102]

Answer:

9

Explanation:

n-factor of NaOH = 1

OH⁻ concentration = Normality of NaOH

                             = Molarity x n-factor

                             = 10⁻⁵ x 1

                             = 10⁻⁵  

Now, pOH = -㏒(OH⁻)

        pOH = -㏒(10⁻⁵)

        pOH = 5

We know pH + pOH = 14

               pH = 14 - 5 = 9

∴pH of 10⁻⁵M NaOH is 9

5 0
3 years ago
Describe the chemical calcium-oxide.
timama [110]

Answer:

Explanation:

Mallabone’s tests suggest there’s no risk the jacket liner will explode or heat up so much that it risks causing burns. The reaction also doesn’t produce acidic byproducts. And because calcium oxide doesn’t react with humidity (water vapor in the air), the liners can be stored for long periods and still work when needed.

Calcium oxide: A substance that gives off heat as it chemically reacts with water. Its chemical formula is CaO (which means each molecule is made up of one calcium atom and one oxygen atom).

Exothermic reaction: A chemical reaction that generates heat as it proceeds. (In Greek, “exo” means outside and “therm” means heat.)

Thought this might help ;)

5 0
2 years ago
The equilibrium constant, K, for the following reaction is 5.10X10 at 548 K. NH_CH(s) 2 NH3(E) + HC1(2) Calculate the equilibriu
Serga [27]

Answer:

The equilibrium concentration of HCl is 0.01707 M.

Explanation:

Equilibrium constant of the reaction = K_c=5.10\times 10^{-6}

Moles of ammonium chloride = 0.573 mol

Concentration of ammonium chloride = \frac{0.573 mol}{1.00 L}=0.573 M

     NH_4HCl(s)\rightleftharpoons 2 NH_3(g) + HCl(g)

Initial:            0.573     0           0

At eq'm:      (0.573-x)   x           x

We are given:

[NH_4Cl]_{eq}=(0.573-x)

[HCl]_{eq}=x

[NH_3]_{eq}=x

Calculating for 'x'. we get:

The expression of K_{c} for above reaction follows:

K_c=\frac{[HCl][NH_3]}{[NH_4Cl]}

Putting values in above equation, we get:

5.10\times 10^{-6}=\frac{x\times x}{(0.573-x)}

2.9223\times 10^{-6}-5.10x\times 10^{-6}=x^2

x^2-2.9223\times 10^{-6}+(5.10\times 10^{-6})x=0

On solving this quadratic equation we get:

x = 0.01707 M

The equilibrium concentration of HCl is 0.01707 M.

3 0
3 years ago
Other questions:
  • element x is a neutral element and has 39 protons. what element is it and how many electrons does it have? (use the periodic tab
    5·1 answer
  • Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table sho
    9·2 answers
  • If you have 30.O g of hydrogen gas burned in excess oxygen how many moles of water can you make
    11·1 answer
  • Will a deflated football sink in water?
    11·2 answers
  • Write a chemical equation for NH4+(aq) showing how it is an acid or a base according to the Arrhenius definition. Express your a
    5·1 answer
  • I need help on thiss
    6·1 answer
  • How many moles of copper Il sulfide can be produced from 2.8 moles of sulfur? Cu + S --&gt; CuS​
    10·1 answer
  • Help help with the question below
    12·1 answer
  • As atoms get smaller,valance electrons are getting closer or farther away from the nucleous.The force of attraction is stronger
    5·1 answer
  • HELP PLEASE FAST 100 POINTS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!