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
Austin conducted a survey and he wants to organize his data so it is easy for him to read and analyze. What computer program sho
Rudiy27
Graph Designer

Hope This Helped!!!:)
4 0
3 years ago
Read 2 more answers
Which of the following intermolecular forces is the strongest?
Tanzania [10]

Answer:

A. Hydrogen Bonding

Explanation:

6 0
3 years ago
How much of the original amount of an isotope is present after a period of four half lives
vfiekz [6]

After 2 half-lives there will be 25% (1/4th) of the original isotope, and 75% (3/4 th) of the decay product

<h3>What is Half life period ?</h3>

A half life is a measurement of the slope of an exponential decay function.

It is also defined as, the time it takes to halve the concentration of something in a process.

Each half life you will have half of what you had at the beginning of a given half life.

Learn more about half life here ;

brainly.com/question/9654500

#SPJ1

7 0
2 years ago
A Sedentary lifestyle is a way of life that includes a lot of physical activity true or false?
geniusboy [140]
2h-7 I had that before unless I’m tripping but I did rechecked
4 0
3 years ago
Increased use of incineration is sometimes advocated as a safe way to dispose of chemical waste. But opponents of incineration p
pochemuha

Answer:

Option A is correct.

At the two incinerators at which leaks were reported, staff had had only cursory training on the proper procedures for incinerating chemical waste.

Explanation:

The main aim of the argument presented is to talk down the use of burning by incinerators method to dispose chemical waste. The argument presents great points in that there were 40 incidents at two existing commissioned incinerators in the last year where unexpected releases of dangerous chemical agents happened.

So, basically, the argument is all about how the high frequency of the unsuspected release of dangerous chemical agents should discourage this method of chemical waste disposal.

The argument then concluded that if more chemical waste are disposed using the burning by incinerator method, there will be more unsuspected release of dangerous chemicals.

We are then required to find the statement that most weakens the conclusion that there will be more toxic releases if more chemical waste are burned.

Analysing the Statements one by one

Statement A

This statement provides a possible reason for this high frequency of dangerous chemical releases. It states that the staff haven't been properly trained. So, this means that properly training the staff should most likely lead to lesser cases of toxic releases into the environment.

This is the statement that most weakens the conclusion.

Statement B

The conclusion wasn't about the incinerator method being the safest method. It was about whether increased incineration would lead to more toxic relaeses. So, this doesn't affect the conclusion.

Statement C

This statement says that incineration can be increased without building new incinerators by tapping into unused capacity at the old incinerators. Also doesn't affect rhe conclusion whether increased use of incineration will lead to more toxic leaks.

Statement D

This statement strengthens the argument; which is the opposite of what we're aiming to achieve.

Statement E

This statement hints that the toxic leaks do not have that much of a harmful effect because the toxic releases do not go beyond the property of the incinerator. This also doesnt tackle the conclusion about the frequency of leaks, it only addresses how not harmful the toxic leaks can be.

Hope this Helps!!!

5 0
3 years ago
Other questions:
  • Suppose you start with 1.80 g of mgco3·5h2o, after complete dehydration how many grams of the sample do you have remaining?
    9·1 answer
  • Is wine a homogenous mixure
    14·1 answer
  • Fog is composed of water droplets in air. Which term describes fog? A. solution B. colloid C. suspention D. solvent
    12·2 answers
  • Please help what are the number atoms for each?!
    12·1 answer
  • Calculate the number of moles present in 9.50g of co2
    13·1 answer
  • What are the abiotic factors a polar bear needs to survive in the tundra?
    6·1 answer
  • PLZ HELP!! I WILL GIVE BRAINLIEST!! 50+PTS!! PLZ HELP!!!! In an exothermic reaction at equilibrium, what is the effect of loweri
    7·2 answers
  • What is the term for electrons that are not held within a bond?
    11·1 answer
  • LOS AMOOOO 1 AL 40 COMENTÉN​
    14·1 answer
  • Molecular formula of sulphur trioxide by criss cross method ​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!