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
Fudgin [204]
3 years ago
6

1. Which of the combinations in the lab activity had indications that a chemical change occured? Defend your argument with evide

nce.
2. Which of the combinations in the lab activity had indications that a physical change occured? Defend your argument with evidence.
3. Are all physical changes reversible? Explain your answer using an example you've observed in your everyday life.
4. Give an example of something you've observed in your everyday life that is a chemical reaction. How did you know it was a chemical reaction?
Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
4 0

Answer:The green growing on the penny of copper and the rust forming on the nail of iron are chemical changes. Boiling away salt water, scraping iron filings from a mixture of sand with a magnet, and breaking a rock with a hammer, are physical changes.

Explanation:

You might be interested in
An element has six valence electrons available for bonding which group of the periodic table does this element most likely belon
professor190 [17]
Elements in groups 16 has six valance electrons.
8 0
4 years ago
Read 2 more answers
Why isn't there a lunar eclipse every time Earth is in between the sun and<br> the Moon?
DerKrebs [107]
Because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.
8 0
3 years ago
2. Electron A falls from energy level X to energy level Y and releases blue light. Electron B falls from energy level Y to energ
Lynna [10]
Wouldnt you find that on the grid or the table
3 0
3 years ago
Read 2 more answers
Burning wood represents a chemical change.<br> True or False?
Strike441 [17]
True
is the answer lol
7 0
3 years ago
Read 2 more answers
6. Calculate the molarity if 35.0 grams of KBr are dissolved in 700. ml?
olga55 [171]

Answer:

To calculate molarity, divide the number of moles of solute by the volume of the solution in liters. If you don't know the number of moles of solute but you know the mass, start by finding the molar mass of the solute, which is equal to all of the molar masses of each element in the solution added together.

Explanation:

try starting with 35.0 and dived it by the volume

8 0
3 years ago
Read 2 more answers
Other questions:
  • Name a soluble compound that contains silver ions.
    12·1 answer
  • In a face-centered cubic structure, every atom has twelve neighbors. which arrangement of balls serves as the best model for thi
    13·1 answer
  • What percentage of the ATP generated from glucose results from oxidative phosphorylation via electron transport chain?
    11·1 answer
  • Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm) required for mercury (Φ =7.2
    10·1 answer
  • What is the correct formula for potassium sulfite? khso khso4 k2so4 k2so3
    11·2 answers
  • What do people mean when they say everything is connected
    7·1 answer
  • A 400. mL sample of gas at 15°C and 113 kPa is heated to 227°C while expanding into a 900 mL container. What is the new pressure
    9·1 answer
  • How many atoms are in .00 × 10-10 g Au
    15·1 answer
  • POINTS AND BRAINIEST ANSWER!!!!
    8·2 answers
  • How did Wilma contribute to change in America
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!