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
Ivanshal [37]
4 years ago
7

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

Chemistry
2 answers:
Ann [662]4 years ago
7 0

Answer:

It is pseudoscience because all matter is known to be made of atoms.

Explanation:

A is wrong. Alchemy is not a science, because it stated that earth, air, fire, and water were elements.

B is wrong. Fire is not a form of matter. It is the heat energy that is released during combustion.

D is wrong. Ancient knowledge is not always mystical, and it is not always reliable.

MA_775_DIABLO [31]4 years ago
3 0

Answer:

It is pseudoscience because all matter is known to be made of atoms.

Explanation:

This is the statement that best explains why alchemy is considered a pseudoscience. Alchemy was considered a science in the past, as it followed the beliefs that were considered true in ancient times. One of these beliefs was the fact that there were only four basic elements in the world: air, fire, earth and water. These were considered the basic building blocks of all matter. Nowadays, we know that all matter is in fact made of atoms.

You might be interested in
Imagine that you are a drop of water in the ocean. Describe a journey through the water cycle. Explain what causes you to change
Scorpion4ik [409]

<em>I am going to use first-person pronouns for this drop of water</em>

[ Start ] Liquid

     I start out as a drop of water among other drops of water in the ocean. I am currently a liquid as I can change shape easily but I do not float up.

[ Middle ] Gas

     The sun feels very hot. From the heat I turn into a gas, specifically water vapor, and float up into the sky.

[ Middle x 2 ] Solid

     In the sky I meet up with a lot of my past friends. We form a cloud, and as we grow heavier (the more the merrier) we start to fall down. It is extremely cold now, so we fall down as a solid, also known as hail or snow.

[ End ] Liquid

     We hit the ocean again as we fall from the sky. I'm so happy to be back home as a water drop again!

Have a nice day! - <u>Please note this is very simplified</u>

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

5 0
3 years ago
Helpppppppppppppp plllllllzzzzzzzzzz
Serggg [28]

4Fe+3O₂⇒2Fe₂O₃

CO₂+2Cl₂⇒O₂+CCl₄

<h3>Further explanation  </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  

3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

For simple equations, you can experiment with the balance of the number of atoms on the left and right

4Fe+3O₂⇒2Fe₂O₃

CO₂+2Cl₂⇒O₂+CCl₄

  • with variable :

aFe+bO₂⇒Fe₂O₃

Fe , left=a, right=2⇒a=2

O, left=2b, right=3⇒2b=3⇒b=3/2

the equation :

2Fe+3/2O₂⇒Fe₂O₃   x2

4Fe+3O₂⇒2Fe₂O₃

aCO₂+bCl₂⇒O₂+CCl₄

C, left=a, right=1⇒a=1

Cl, left=2b, right=4⇒b=2

O, left=2a, right=2⇒2a=2⇒a=1

the equation :

CO₂+2Cl₂⇒O₂+CCl₄

8 0
3 years ago
What is solar radiation?
mafiozo [28]

Explanation:

Solar energy is the radiant energy emmitted from the Sun. It is the electromagnetic energy

8 0
3 years ago
Today, the annual rate of tectonic plate movement is observed and measured b
rodikova [14]
Yes I think yesi,m not really suer
4 0
4 years ago
PLZZZZZ HELPP How do you predict the bond length and energy would change if hydrogen formed a bond with Astatine (At)? ​
kkurt [141]

The bond length and energy of the bond formed between hydrogen (H) and astatine (At) would change if the bond order <u>increases</u> or <u>decreases</u> or when its potential energy is at the <u>lowest</u>.

<h3>What is bond length?</h3>

Bond length is also referred to as bond distance and it can be defined as an equilibrium distance between the nuclei of two (2) covalently bonded atoms in a molecule.

<h3>What is bond energy?</h3>

Bond energy can be defined as the amount of chemical energy that is required to break one mole of a given chemical bond.

In Chemistry, the bond length and energy of a molecule is typically determined by the following:

  • The bond order or number of bonded electrons.
  • The potential energy possessed by the molecule.

In conclusion, you can predict that the bond length and energy of the bond formed between hydrogen (H) and astatine (At) would change if the bond order increases or decreases or when its potential energy is at the lowest.

Read more on bond energy here: brainly.com/question/5650115

6 0
2 years ago
Other questions:
  • The energy needed to completely remove a hydrogen atom from an oxygen atom is called
    13·1 answer
  • A solid turns to a liquid because of increased or decreased heat
    7·2 answers
  • A volume of 90.0 mLmL of aqueous potassium hydroxide (KOHKOH) was titrated against a standard solution of sulfuric acid (H2SO4H2
    9·1 answer
  • Why do objects appear to move across the sky
    6·1 answer
  • Carbon-14 undergoes radioactive decay in the reaction above. Determine the type of radiation emitted in this reaction and descri
    10·2 answers
  • • What type of rock is used for radiometric dating, Why?
    14·1 answer
  • Will Mark Brainly if correct.
    7·1 answer
  • Can someone help me please!(I will mark you brainliest)
    10·1 answer
  • If zinc has an atomic number of 30 and a mass number of 65 what is the correct number of protons neutrons and electrons ?
    12·2 answers
  • Which is a chemical property of hydrogen?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!