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
GuDViN [60]
3 years ago
15

1. Which of the following is a physical change? (2 points) A newspaper burns when placed in a fire. An iron chair rusts when lef

t outside. A sample of water boils and releases gas. A plant changes carbon dioxide and water into sugar.
Chemistry
2 answers:
andre [41]3 years ago
4 0
A. It is changing state, color. Etc.
Brilliant_brown [7]3 years ago
3 0
<span>An iron chair rusts when left outside.</span>
You might be interested in
What is the chemical reaction that occurs during photosynthesis ​
vfiekz [6]

Answer:

endothermic change occurs

Explanation:

photosynthesis, is an endothermic reaction in which energy is absorbed from the surrounding.

hope this helps

8 0
3 years ago
Read 2 more answers
What are the number of protons, electrons, and neutrons in one atom of titanium?.
Olin [163]

Answer:

Protons: 22

Neutrons: 26
Electrons: 22

Explanation:

Titanium's atomic number is 22, meaning that the number of protons it has in its nucleus is also 22. # of electrons = # of protons, so the number of electrons is also 22. Titanium has an atomic mass of 47.867, but we can round up to 48. To find the atomic mass, we add up number of protons and neutrons. We know the number of protons as 22, so we subtract 22 from 48 and get a number of 26. Thus, the number of neutrons is 26.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

3 0
3 years ago
Which of these chemical formulas — Cl2 , KCI, Ar, NO2– represents both an element and a molecule ?
Tasya [4]

The answer is: Cl2.

Chlorine is diatomic molecule made of two chlorine atoms.

Diatomic molecules are molecules made of two atoms.

They can be homonuclear (molecule made of two atoms of the same element) and heteronuclear (molecule made of two different atoms).

Chlorine (Cl) is halogen element.

Halogen elements are in group 17: fluorine (F), chlorine (Cl), bromine (Br) and iodine (I). They are very reactive and easily form many compounds.



4 0
3 years ago
Read 2 more answers
Convert 50 m to mm <br> using the method of dimensional analysis
shusha [124]

Answer:

Explanation:

meters has to go on the bottom of the bracket used for conversion

50m [ 1000 mm / 1 m]= 50000 mm The meters cancel

3 0
3 years ago
1.
Novosadov [1.4K]

Answer: B. High precision

Explanation:

6 0
3 years ago
Other questions:
  • The compound cisplatin, pt(nh3)2cl2 , has been studied extensively as an antitumor agent.
    11·1 answer
  • A sample of a compound contains 30.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?
    13·1 answer
  • sarah is on a road trip with a friend. their car has a 15-gal tank and averages 30 mi/gal. how many miles can they travel on a f
    13·2 answers
  • The theory of evolution states
    14·1 answer
  • Franklin used X-ray crystallography to determine that the shape of the dna molecule is what
    15·1 answer
  • During free fall which object would have a greater acceleration, an object with a mass of 240 kg or an object with a mass of 10
    14·1 answer
  • Draw the structures of organic compounds A and B. Indicate stereochemistry where applicable The starting material is ethyne, a c
    11·1 answer
  • Helpppppp i hate chemistry
    12·1 answer
  • Which element has the least density at STP?
    11·1 answer
  • If the cell is somehow operated under conditions in which it produces a constant voltage of 1.50 V , how much electrical work wi
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!