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
elixir [45]
3 years ago
6

A student conducts an experiment with a steel wool pad, which is comprised of iron. The student washes the steel wool in vinegar

and then leaves the wool out in the open air for 15 minutes. The student notices that the wool is changing color (turning brownish-orange) and when the student touches the steel wool, it feels warm to the touch.
Which of the follow changes occured during this experiment?
A. A physical changed occured and energy was given off
B. A chemical change occured and energy was given off
C. A chemical change occured and energy was absorbed.
D. A physical change occured and energy was absorbed
Chemistry
1 answer:
Ksju [112]3 years ago
3 0
B. A chemical change has occurred and energy was given off
You might be interested in
You have decided to test the effects of five garden fertilizers by applying some of each to five separate rows of radishes. what
attashe74 [19]

You are testing which fertilizer makes the radishes grow the fastest.

factors you should control: sunlight exposure, water amount, fertilizer amount.

Measure: check the rows of radishes to see how much each row has grown in comparison to the others. Whichever row with the healthiest radishes has the best fertilizer.

5 0
3 years ago
An atom in the ground state contains a total of 5 electrons 5 protons and 5 neutrons. Which Lewis electron-dot diagram represent
Luba_88 [7]
I don't know if you didn't gave a picture choice or if i didn't get the picture.
But lets call this atom A. Electron dot formula doesn't require Neutron and Protons, its main concern is valance elections.

So atom A has 5 electrons which means 2,3 it has 3 valance electrons. Its dot formula will become
:A.

I hope this helped.
7 0
3 years ago
How does radioactive isotopes decay?
aksik [14]
They can decay through one of three ways: 
alpha decay
beta decay and
gamma decay
ALPHA- particle with two neutrons and two protons is ejected from the nucleus of the radioactive atom. this particle released is called an alpha particle. Only occurs with heavy metals.
BETA- pretty much when a proton is transformed into a neutron, or vise versa. in a beta minus decay, the nuetron decays into a proton and in a beta plus decay, a proton decays into a neutron
GAMMA- the nucleus changes from a high energy state to a low energy state by releasing electromagnetic radiation (photons). the number of protons and neutrons stay the same during this reaction therefore the element is still the same.
7 0
3 years ago
Which of the following concerning the effects of temperature and pressure on solubility is/are correct?
just olya [345]

Answer:

None of the options are correct.

Explanation:

1) when the temperature of the solution is increased the solubility of the gas in the liquid decreases , hence option 1 is incorrect.

2)The heat released by the dissolution of an ionic compound in water is heat of hydration of the compound and is independent of the initial temperature of the solution.

3) The solubility of a liquid in water is not affected significantly by the pressure changes in the system as gases only have a significant cahne in solubility with change in pressure.

5 0
3 years ago
Use the periodic table to identify each of the following bonds as polar or nonpolar.
Molodets [167]

Answer:

Polar  

Step-by-step explanation:

Electronegativity increases from <em>left to right</em> in the Periodic Table.

Cl is further right than C (both tinted pink) in the portion of the Periodic Table below.

Cl is <em>more electronegative</em> than C, so the Cl has a partial negative charge and the C has a partial positive charge.

The C-Cl bond is polar.

5 0
3 years ago
Other questions:
  • Where do you think information is coded in a DNA molecule?
    14·2 answers
  • What does not release carbon dioxide into the atmosphere
    15·2 answers
  • What is the amount of mass per unit volume of a material
    15·2 answers
  • 7. Which part moves the blood away from the heart?
    15·2 answers
  • Select all the the abiotic factors that could impact a deer population.
    9·1 answer
  • HELP! HELP!<br> an element with 5 protons, and 8 electrons has an atomic number of?
    12·1 answer
  • Nfpa diamond for benzoic acid
    6·1 answer
  • PLEASEEEEE ANSWERRR??
    7·1 answer
  • What is the albedo affect
    8·2 answers
  • S + 6 HNO3 → H₂SO4 + 6 NO₂ + 2 H₂O
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!