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
Andrews [41]
3 years ago
12

What are two examples of a chemical change

Chemistry
2 answers:
lyudmila [28]3 years ago
6 0

Answer:

1.Cooking an egg

2. Burning wood

Hope it helps :)

Taya2010 [7]3 years ago
5 0
Answer:

1.Mixing of sodium with water

2.rusting of iron


Step by step explanation:
You might be interested in
why would a can of soda fizz much more when opened on top of Mt. Everest than when opened at sea level?
Gelneren [198K]
This would happen because the pressure on Mt.Everest is much more higher than the pressure at sea level, the can would probably be swollen so to this too.
8 0
3 years ago
Tungsten (W) and chlorine (Cl) form a series of compounds with the following compositions:_______.
deff fn [24]

Answer:

WCl₂, WCl₄, WCl₅, WCl₆

Explanation:

Molar Mass of Tungsten = 184 g/mol

Mass of Chlorine = 35.5 g/mol

In the first compound;

Percentage of tungsten = 72.17 %

Upon solving;

72.17 % = 184

100 % = Total mass

Total mass of compound = 254.95g

Mass of chlorine = 254.95 - 184 = 70.95 (Dividing by 35.35; This is approximately 2 Chlorine atoms.

The Formular is WCl₂

In the second compound;

Percentage of tungsten = 56.45 %

Upon solving;

56.45 % = 184

100 % = Total mass

Total mass of compound = 325.95 g

Mass of chlorine = 325.95 - 184 = 141.95g (Dividing by 35.35; This is approximately 4 Chlorine atoms.

The Formular is WCl₄

In the third compound;

Percentage of tungsten = 50.91 %

Upon solving;

50.91 % = 184

100 % = Total mass

Total mass of compound = 361.42 g

Mass of chlorine =  361.42 - 184 = 177.42 (Dividing by 35.35; This is approximately 5 Chlorine atoms.

The Formular is WCl₅

In the fourth compound;

Percentage of tungsten = 46.39 %

Upon solving;

46.39 % = 184

100 % = Total mass

Total mass of compound = 396.64 g

Mass of chlorine = 396.64 - 184 = 212.64 (Dividing by 35.35; This is approximately 6 Chlorine atoms.

The Formular is WCl₆

4 0
3 years ago
Which theory describes the motion of and force driving earth’s plates?
swat32

The theory that describes the motion and force driving earth's plates is Plate tectonics

Explanation:

Plate tectonics states that the outer shell of the Earth is divided into plates that glide and move over the mantle which is the surface of the earth.

The mantle is the rocky inner layer above the core of the Earth.

Plate tectonics helped the geologists to explain how continents could move around the planet.

There are 9 major plate tectonics , namely North American, Pacific, Eurasian, Australian, African, Indo - Australian,Indian South American and Antarctic. These plates have been named after the land form found on them.

7 0
3 years ago
Compare the shape of a chemical signalling molecule and a receptor.
Andru [333]

Cell signalling is a process by which cells communicate with each other and transfer messages.

<h3>What is a receptor?</h3>

A molecule inside or on the surface of a cell binds to a specific substance and causes a specific effect in the cell.

Cell signalling is a process by which cells communicate with each other and transfer messages. When a signal molecule binds to a receptor protein, changes occur in the receptor proteins. Two changes are listed below:

1. The receptor protein undergoes conformational changes and acts as an enzyme.

2. The receptor protein that makes a second messenger molecule that leads the reaction further to other cells or molecules.

Learn more about the receptor here:

brainly.com/question/6438216

#SPJ1

6 0
2 years ago
Please help with this chemistry question above!
Lady_Fox [76]

Hey there!

Your answer is B. CO₂.

This molecule consists of two polar bonds, but they cancel each other out because they are pointing away from each other.

Because the forces of the bonds cancel out, the molecule itself is nonpolar.

Hope this helps!

3 0
4 years ago
Other questions:
  • 2074 Set B Q.No. 1 What mass of nitrogen will be requires
    14·1 answer
  • Which shows the temperatures of three substances, in order, from greatest to least?water vapor, ice, waterice, water, water vapo
    11·2 answers
  • How many grams of H2O will be produced if 750 grams of Fe are produced?<br><br> Fe3O4+ H2 → Fe+H2O
    9·1 answer
  • Which of the mole ratios would be used to set up the below problem?
    13·1 answer
  • What is convection?
    13·1 answer
  • What is formed during a chemical reaction when electrons are lost and gained?
    15·1 answer
  • What is the full form of HPC
    8·1 answer
  • What type of force is produced when two objects are in contact, then move (or try to move) past each other?
    13·1 answer
  • Help plz:)))I’ll mark u Brainliest
    5·1 answer
  • PLEASE HELP ME NO LINKS
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!