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
Yuliya22 [10]
4 years ago
8

Please Help Thank You

Chemistry
2 answers:
Stells [14]4 years ago
7 0
Its gonna be to learn about history on earth
Nikitich [7]4 years ago
5 0
The first option is the correct answer. Fossils belong to dinosaurs that lived in B.C/A.D, which scientists study to learn about Earth's prehistoric times.
You might be interested in
Different elements emit different emission spectra when they are excited because each type of element has a unique energy level
jonny [76]
Different elements emit different spectra when their electrons get excited because each element has a different arrangement of electrons surrounding the nucleus.  The energy levels in which the electrons can occupy are unique to a specific element. When an electron gets excited into a higher energy level, it will eventually relax back into its original state and emit light corresponding to that energy. 
8 0
3 years ago
I’ve been up all night doin chemistry, can someone please give me the answers
m_a_m_a [10]
Here are your answers:

1. MgBr2 + Cl2 = MgCl2 + Br2

Balancing,
Already balanced.

Type of reaction: single displacement


2. Al + Fe2O3 = Al2O3 + Fe

Balancing,
2Al + Fe2O3 = Al2O3 + 2Fe

Type: single displacement reaction


3. AgNO3 + ZnCl2 = AgCl + N2O6Zn

Balancing,
2AgNO3 + ZnCl2 = 2AgCl + N2O6Zn

Type: double displacement reaction

MnO2
4. H2O2 ====== O2 + H20 [being catalyzed by manganese dioxide]

Balancing,
MnO2
2H2O2 ====== O2 + 2H2O

Type: decomposition reaction


5. Zn + HCl = ZnCl2 + H2

Balancing,
Zn + 2HCl = ZnCl2 + H2

Type: single displacement reaction


6. H2SO4 + NaOH = Na2SO4 + H2O

Balancing,
H2SO4 + 2NaOH = Na2SO4 + 2H2O

Type: Acid-base reaction




That took hella long!!! Hope it helps.
4 0
3 years ago
Where is the intersection of the position and time axes located on a position-versus-time graph?
Bad White [126]

it is located at the origin so A

hope this helped ^_^

5 0
3 years ago
Which weighs more 10g of iron or 10g of water
Svet_ta [14]

Neither. They are both 10 grams so they weigh the same.

4 0
3 years ago
Read 2 more answers
2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)<br> how many atoms are in 3.2 moles of KCl?
Gekata [30.6K]

Answer:

If u use math why It will give u the answer like 3x3=9

Explanation:

4 0
3 years ago
Other questions:
  • What will Number 17 be?
    9·1 answer
  • How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2?
    12·1 answer
  • An atom of selenium (Se) forms a monatomic ion. Which of the following ions does is most likely form?
    9·2 answers
  • PLZ HELP, GIVING BRAINLIEST!!
    11·1 answer
  • Predict Which molecules are more strongly attracted to one another—C 3 H 8 O molecules that make up liquid rubbing alcohol or CH
    11·1 answer
  • The electrons in an atoms outermost orbitals, the electrons, are represented in a(n) , which consists of the elements symbol, re
    8·1 answer
  • When hydrogen chloride (HCI) reacts with ammonia (NH3), ammonium chloride (NH4CI) is
    9·1 answer
  • Help with this question
    13·1 answer
  • What is the mass of 0.75 mol of hydrogen sulfide
    14·2 answers
  • What do you think our solar system consists of?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!