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
Fed [463]
3 years ago
5

Workers in coal mines use battery operated torch lights instead of lanterns. What is the reason?

Chemistry
1 answer:
weqwewe [10]3 years ago
3 0

it is much more efficient and environmentally conscious.

You might be interested in
If 0.35 moles of kcl was dissolved in enough water to make 0.2 L of solution, what is molarity?
Mars2501 [29]

Answer:

1.75M

Explanation:

molarity = number of moles of solute/ number of L of solution =

=0.35 mol/0.2L = 1.75 mol/L = 1.75 M

8 0
3 years ago
An irregularly shaped stone was lowered into a gradulated cylinder holding a volume of water equal to 12mL.the height of the wat
denis23 [38]
The density of the stone is 5 because the formula is mass/volume and the volume is 5 and the mass is 25
4 0
3 years ago
Chemical energy is a form of A. kinetic energy only. B. both potential and kinetic energy. C. neither potential nor kinetic ener
svetlana [45]

wrong. If its for the study island its potential energy only.

6 0
3 years ago
Instead of 6 M NaOH being added to the solution, 6 M HCl is added. How will this affect the test for the presence of ammonium io
Lera25 [3.4K]

Answer:

Ammonia gas(an alkaline gas with characteristics of choking or irritating smell) is not liberated when 6mole of HCl is added to the solution instead of 6mole of NaOH, to test for the presence of ammonium ion in the solution

Explanation:

As expected, when testing for ammonium ion in a solution (precisely ammonium salt solution), Sodium Hydroxide (NaOH) is required as the test reagent.

When NaOH is added to the solution, A gas with characteristics of choking or irritating smell is liberated.

This gas turn red litmus paper blue.

This liberated gas is an alkaline gas, which is confirmed as an ammonia gas(NH3).

If HCl is added instead of NaOH, the ammonia gas will not be liberated, which indicates that the test reagent used is wrong.

3 0
3 years ago
4. What are the potential sources of error that might cause disagreement between the activity series' prediction of reactions an
nika2105 [10]

Answer:

1. Not to have enough salt water on the foil

2.not cleaning the foil well to remove interfering materials

6 0
3 years ago
Other questions:
  • Why is the ability to respond to stimuli critical?
    5·2 answers
  • What do sediments press into
    11·1 answer
  • Which part of the atom is directly involved in chemical changes? A. the electron B. the energy levels C. the nucleus D. the char
    14·1 answer
  • Bob the chemist ran a TLC plate of his product, but the spot would not move off the baseline. The eluent he used consisted of a
    15·1 answer
  • Which of the following can be mixed in solution with NH2 to make a buffer?
    15·2 answers
  • The molecular weight of NaCl is 58.44 grams/moles. How many grams of NaCl are found in a beaket with 100 ml of a 0.0050 M soluti
    13·1 answer
  • The standard emf for the cell using the overall cell reaction below is +2.20 V:
    15·1 answer
  • Which two changes in state are most represented in water cycle
    12·1 answer
  • 20 points to whoever can answer these 3 questions correctly
    10·1 answer
  • Question 9 (4 points)
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!