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
mote1985 [20]
3 years ago
7

Scientists decide that in an experiment on fish, all the fish will be fed the same amount of food

Chemistry
1 answer:
Liula [17]3 years ago
4 0
This is a controlled variable
You might be interested in
what is the diffrence between displacement ans double displacement reactions write equations for these reactions
Lina20 [59]

Answer:

Single Displacement reaction  

In a displacement reaction, a more reactive element replaces a less reactive element from a compound.

Change in colour takes place with no precipitate forms.

Metals react with the salt solution of another metal.

Examples:

2KI + Cl2 → 2KCl + I2

CuSO4 + Zn → ZnSO4 + Cu

Double displacement reaction

In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.

Precipitate is formed.

Salt solutions of two different metals react with each other.

Examples:  

Na2SO4 + BaCl2 → BaSO4 + 2NaCl

2KBr + BaCl2 → 2KCl + BaBr2

Hope this helps...Please Mark as Brainliest!!

8 0
3 years ago
Complete combustion of a 17.12mg sample of xylene In oxygen yielded 56.77mg
Veronika [31]

Xylene moles =\frac{17.12}{106.16×1000}=0.00016moles=

106.16×1000

17.12

=0.00016moles

Moles of CO_2 =\frac{56.77}{44.01×1000}=0.0013CO

2

=

44.01×1000

56.77

=0.0013

Moles of H_2O= =\frac{14.53}{18.02×1000}=0.0008H

2

O==

18.02×1000

14.53

=0.0008

Moles ratios

\frac{0.0013}{0.0008}=1.625

0.0008

0.0013

=1.625

\frac{0.0008}{0.0008}=1

0.0008

0.0008

=1

Hence molecular fomula

The empirical formula is C 4H 5.

The molecular formula C8H10

8 0
2 years ago
Give the nuclear symbol for the isotope of potassium for which a=40?
KATRIN_1 [288]

<span>nuclear symbol consists of three parts: 1. the symbol of the element; 2. the atomic number of the element;3. the mass of the element. for the above problem, the symbol for potassium is k. it's atomic number is 40. the number of protons is 19. so we denote this in the following nuclear symbol; 40 k 19</span>

4 0
3 years ago
Read 2 more answers
How do I calculate the sum of 6.078 g and 0.3329 g ?
Vesnalui [34]
The answer is 6.4109 grams
8 0
3 years ago
How many significant figures are in 340500
vovikov84 [41]
There are 4 significant digits: 3405.
4 0
3 years ago
Other questions:
  • Jimmy's science textbook reflects blue light. What color is the book?
    10·2 answers
  • Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What
    11·2 answers
  • According to Le Châtelier’s Principle, the amount of solid reactant or product present does not have an impact on the equilibriu
    9·1 answer
  • The Thompson analogy titled "The Carpet-Seed Children Analogy" attempts to deal with the issue of failed ____________________(A)
    15·1 answer
  • The addition of NaOH to water would result in which of the following?
    11·1 answer
  • PLEASE HELP!!!
    5·1 answer
  • Which statement does NOT correctly compare boron with another element?
    9·1 answer
  • 1 point
    9·1 answer
  • Which of the following measurements has FOUR significant figures?
    11·1 answer
  • How is the polarity of a bond different from the polarity of a molecule?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!