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
natali 33 [55]
3 years ago
14

What is a control?

Chemistry
2 answers:
White raven [17]3 years ago
6 0

Answer:

a is the answer

please mark it brainliest

Neporo4naja [7]3 years ago
6 0

Answer:

A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation.

Explanation:

You might be interested in
two people start out 100 meters apart from each other and start moving towards each other at the same time. One person is moving
andreev551 [17]

Answer:

1.332 meters per second. // 2.664 meters per second.

Explanation:

the slower person moved 33.3 meters, and the faster person moved 66.6 meters.

the slower person is moving 33.3 meters in 25 seconds, while the other person is moving 66.6 meters in 25 seconds

slower person moved 33.3/25 = 1.332 meters per second.

faster person moved 66.6/25 = 2.664 meters per second.

4 0
3 years ago
Why do the air molecules inside a bicycle tire speed up as the temperature gets warmer?
liraira [26]
The correct answer of the given question above would be option A. The air molecules inside a bicycle tire speed up as the temperature gets warmer because the heat is transferred to the molecules and gives them more kinetic energy. <span>When </span>heat<span> is added to a substance, the </span>molecules<span> and atoms vibrate </span>faster<span>. </span>
6 0
3 years ago
Read 2 more answers
What determines the name of an element
otez555 [7]
Nothing in particular determines the name of an element, it could range from who discovered it to where it was discovered!
7 0
4 years ago
Read 2 more answers
6. Think of some other chemical reactions. List them and the type of reaction: exothermic or endothermic. Example: Burning coal
Oksanka [162]

Remember: energy is conserved in a chemical reaction (visualize the reaction and question whether heat lies on reactant side (left) or product side (right))

-exothermic- heat is released (heat is on the product side)

>forming an ionic lattice (SALT)- mixture of Na and Cl results in a more stable ionic lattice, causing this reaction to be exothermic

>burning wood

-endothermic- heat is absorbed (heat is on the reactant side)

> cooking an egg

7 0
3 years ago
The heat of fusion for water is the amount of energy that must be absorbed for water to _____.
ivanzaharov [21]
I would say A.evaporate because the water is getting absorbed.

4 0
3 years ago
Other questions:
  • What is the mass, in grams, of 1.33 mol of water, H2O?
    9·1 answer
  • Which activity performed by a chemist is primarily based on an understanding of physics?
    13·2 answers
  • Which is a nonpolar molecule?
    12·2 answers
  • Match the term to the correct definition or example.
    6·1 answer
  • A physical change occur when a
    12·2 answers
  • PLEASE ANSWER
    6·1 answer
  • Which statements describe the relationship between the area and the bioversity
    12·1 answer
  • How many atoms are in 10 g of O
    14·1 answer
  • 117 milligrams (mg) of purified product was isolated from a chemical reaction. This experimental yield of product represents a 8
    12·1 answer
  • What are the differences between sand and potting soil? Are they both mixtures? How do you know?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!