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
Tomtit [17]
3 years ago
5

Why do metals change in appearance over time?

Chemistry
1 answer:
gogolik [260]3 years ago
5 0

The exterior surface of metal can be changed by many chemical reaction takes place the reaction is carried out by presence of oxygen and water in air which Demage shiny surface of metal. The other processes can also be involved as pollution, moisture and environmental change can also effect on the surface of metal.

If metal is keept in open environment for a long time moisture contents in air boats the corrosion and rusting of metal processes.

Hopefully you will understand.

You might be interested in
PLEASE HELP!!!!!!!!!!!!!!
Akimi4 [234]

Answser

i didnt do dis my mom has a answer key book

Explanation:

4 0
2 years ago
What does the number next to ions signify?
dusya [7]
<span>The number next to the simbol of the element ions (as a superscript) means the number of charges of the ion. For example N (+),, where (+) is a superscript means that the charge of the ion is 1+. S(2-), where (2-) is a superscript, means that the charge of the ion is (2-). OH (-), where (-) is a superscript, means that the charge of OH ion is (1-) . </span>
6 0
3 years ago
An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
sukhopar [10]
I believe it is C; reasoning being that the hint for physical change is," the producing of a gas," chemical "that's new and diff. substance. "
5 0
3 years ago
3.00 L of a gas is collected at 35.0°C and 705.0 mmHg. What is the volume at STP?
makvit [3.9K]

Answer:

2.47L

Explanation:

Using the combined gas law equation as follows:

P1V1/T1= P2V2/T2

Where;

P1 = initial pressure (mmHg)

P2 = final pressure (mmHg)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 705mmHg

P2 = 760mmHg (STP)

V1 = 3.00L

V2 = ?

T1 = 35°C = 35 + 273 = 308K

T2 = 273K (STP)

Using P1V1/T1= P2V2/T2

705 × 3/308 = 760 × V2/273

2115/308 = 760V2/273

Cross multiply

308 × 760V2 = 2115 × 273

234,080V2 = 577,395

V2 = 577,395 ÷ 234,080

V2 = 2.47L

8 0
3 years ago
Metals lose electrons under certain conditions to attain a noble gas electron configuration. How many electrons must be lost by
viva [34]

Answer:

2 electrons

E. neon

Explanation:

Metals lose electrons under certain conditions to attain a noble gas electron configuration. Magnesium has 12 electrons and its electron configuration is

1s² 2s² 2p6⁶ 3s²

When magnesium loses 2 electrons, it acquires the electron configuration of neon (10 electrons).

5 0
3 years ago
Other questions:
  • Which option accurately describes the first two stages of photosynthesis?
    6·1 answer
  • What type of chemical reaction is so3(g) + h2o(l) → h2so4(aq)?
    13·1 answer
  • Compare and contrast and give the definitions of:<br> Partial + charge<br> Partial - charge
    7·2 answers
  • The______ the forces among the particles in a sample of matter, the more rigid the matter will be.
    6·1 answer
  • A 12.0 wt% solution of CaCl2 (110.98 g/mol) has a density of 1.107 g/mL.
    15·1 answer
  • How do you figure out the number of protons, neutrons, and electrons in each of these isotopes? a. 6/3 Li, 7/3 Li b. 42/20 Ca, 4
    8·1 answer
  • Rico mixed up 500 cc of salt solution. He weighed it and found its mass to be 585 g. Will his shake-up toy work the way he wants
    11·1 answer
  • Write the separation scheme for the isolation of triphenylmethanol from the reaction mixture once the reaction is complete. The
    12·1 answer
  • Suggest two observations that would be made when rubidium is added to cold water.
    11·1 answer
  • How many moles are there in 32.4 grams of Na
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!