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
Natali5045456 [20]
2 years ago
15

When silver coins are found in ancient shipwrecks,they are coated with a black crust. What question could you ask to help you de

cide whether the silver underwent a chemical change or a physical change? Explain.
Chemistry
1 answer:
leonid [27]2 years ago
8 0
It went under a physical change because it (1) changed color. (2) changed form.
You might be interested in
Please Please Please Please Please Help Me (please answer this question completely and 1 will friend you and help you with your
pav-90 [236]

Answer:

Static electricity is a type of energy that is produced by friction.

Explanation:

Static electricity may be the result when there is an imbalance between the negative charges and the positive charges in the surroundings. They are non contact forces. They pull of push without actually touching the body. The charged particles interact by pulling or pushing the uncharged particles.

These charges are released when they come closer to some uncharged or other charged particles like the electrostatic charges. It is the charge build up in an area.

6 0
3 years ago
Name at least four other gases in the atmosphere besides oxygen and nitrogen
nikitadnepr [17]
Carbon dioxide (CO2)
Argon (Ar)
Hydrogen (H)
Helium (He)
8 0
2 years ago
Why increasing the temperature of a gas would increase the volume of its container in gas law?
Zarrin [17]

When the amount of gas in a container is increased, the volume increases. Lussac's law states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature.

7 0
2 years ago
Really need help with this<br> Will give brainliest to whoever has the correct answer
lukranit [14]

Answer:

a=0.4\ m/s^2

Explanation:

1. Given that,

Initial speed of a bicycle, u = 4 m/s

The final speed of a bicycle, v = 6 m/s

Time, t = 6 s

We need to find the acceleration of the bicycle. We know that, acceleration is    equal to the change in speed divided by time taken. So,

a=\dfrac{v-u}{t}\\\\a=\dfrac{6-4}{5}\\\\a=0.4\ m/s^2

So, the acceleration of the bicycle is equal to 0.4\ m/s^2.

5 0
3 years ago
What is the mass of 8.8 x 10^22 of magnesium
Romashka-Z-Leto [24]

Answer:

0.05

moles

Explanation:

In a mole of any substance, there exist

6.02⋅1023

units of that substance.

So here, we got:

3.01⋅1022Mg atoms⋅1mol6.02⋅1023M gatoms=0.05mol

3 0
3 years ago
Other questions:
  • A compound is 2.00% H by mass, 32.7% S by mass, and 65.3% O by mass. What is its empirical formula? The second step is to calcul
    5·2 answers
  • 18. This reaction uses hydrogen
    9·1 answer
  • The reaction for the formation of gaseous hydrogen fluoride (HF) from molecular hydrogen (H2) and fluorine (F2) has an equilibri
    15·1 answer
  • Which element(s) are not balanced in this equation?
    15·2 answers
  • What is a societal law
    9·2 answers
  • Identify and name the functional group present<br> CH4
    8·1 answer
  • 3. How are the protons held in the
    9·1 answer
  • Which statement describes the feeling interactions between frogs and insects? Select all that apply.
    6·1 answer
  • What is the general formula for a straight-chain alkane?
    9·1 answer
  • How do scientists collect evidence to form a valid theory about the formation and early development of the solar system?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!