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
weqwewe [10]
3 years ago
13

When must scientist conduct controlled experiments ?

Chemistry
1 answer:
iVinArrow [24]3 years ago
8 0
Usually when scientist wants to test whether one compound or one phenotype is related to another phenotype. Then they need to control this variable when conducting experiments.
You might be interested in
What is the definition of a Lewis acid?
Vedmedyk [2.9K]

Answer:

Explanation:

Un ácido de Lewis es una especie química que contiene un orbital vacío que es capaz de aceptar un par de electrones de una base de Lewis para formar un aducto de Lewis

3 0
3 years ago
CH 4 History and Structure of the Atom
Butoxors [25]

Answer:

a) Cl, 17 protons and 17 electrons

Explanation:

The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. The atomic number of chlorine is 17. Its means it has 17 protons and 17 electrons.

The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom. Thus the atomic mass of chlorine will be 17+18 = 35 amu

Number protons = 17

Number of electrons = 17

Number of neutrons = 18

Properties of Chlorine:

1. it is greenish-yellow irritating gas.

2. its melting point is 172.2 K

3. its boiling point is 238.6 K

4. it is disinfectant and can kill the bacteria.

5. it is also used in manufacturing of paper, paints and textile industries.

5 0
3 years ago
Which of the gas laws takes into account the forces of attraction between molecules based on the characteristics of the gas? *
Alika [10]
The answer is Boyle’s Law
5 0
3 years ago
Acellus<br> How many grams of strontium<br> (Sr, 87.62 g/mol) are in 2.92<br> moles of strontium?
saul85 [17]

Answer:

There are 255, 85 grams of Strontium in 2,92 moles.

Explanation:

We perform a simple rule of three to calculate the number of grams, knowing that one mole of Sr weights 87, 62 grams:

1 mol Sr---------87, 62 grams

2,92 mol Sr-----x=(2,92 mol Sr x-87, 62 grams)/1 mol Sr= 255,8504 grams

5 0
3 years ago
What ingredients are needed to turn the cake mix into cake batter​
svp [43]

Answer:

Ingredients

2 ⅓ cups all-purpose flour.

1 tablespoon baking powder.

¾ teaspoon salt.

1 ½ cups white sugar.

½ cup shortening.

2 eggs.

1 cup milk.

1 teaspoon vanilla extract.

Explanation:

4 0
3 years ago
Other questions:
  • A sample of gas in which [h2s] = 5.25 m is heated to 1400 k in a sealed vessel. after chemical equilibrium has been achieved, wh
    7·1 answer
  • What is the number of grams of cl2 formed when 0.485 mole HCl reacts with an excess of O2
    6·1 answer
  • How many ounces are in a 2-liter of soda? Just out of curiousity?
    9·1 answer
  • When balancing a redox reaction, you are balancing
    8·2 answers
  • A book is sliding across a horizontal tabletop. As it slides, slows down. Which of the following statements best explains this s
    10·2 answers
  • If I have 3 liters of solute, and 4 liters of solvent how many liters in solution do I have?
    14·1 answer
  • What is the main purpose of the nervous system?
    13·1 answer
  • Which photographs show an object in orbit? Explain your answer.
    5·2 answers
  • The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is
    6·1 answer
  • What happens at a convergent boundary?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!