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
Drupady [299]
3 years ago
6

How do scientists test their ideas?

Chemistry
2 answers:
sasho [114]3 years ago
4 0
The answer is c because scientists need to make there test is right
kolezko [41]3 years ago
3 0
It is <span>By controlling their experiments to isolate a single variable</span>. so B
You might be interested in
A reaction is second order respect to the reactant A. If the reaction is 85% complete in 12 minutes, how long would it take for
AnnZ [28]

Answer:

e. 22s

Explanation:

Initial Concentration = 100

Final concentration = 15 ( Since the reaction is 85% complete)

Time = 12 minutes = 720 seconds

The integrated rate law for second order reactions is given as;

1 / [A] = (1 / [A]o) + kt

Making k subject of interest, we have;

kt = (1 / [A] ) - (1 / [A]o )

k = (1 / [A] ) - (1 / [A]o ) / t

k = [(1/ 15) - (1 / 100) ] / 720

k = (0.0667 - 0.01 ) / 720

k = 0.0567 / 720

k = 7.875e^-5

How long would it take for the reaction to be 15% complete?

Final concentration = 85 (Since the reaction would be 15% complete)

The integrated rate law for second order reactions is given as;

1 / [A] = (1 / [A]o) + kt

Making t subject of interest, we have;

kt = (1 / [A] ) - (1 / [A]o )

t = (1 / [A] ) - (1 / [A]o ) / k

t = [(1 / 85 ) - (1 / 100) ] / 7.875e^-5

t = (0.0117 - 0.01 ) / 7.875e^-5

t = 0.001765 / 7.875e^-5

t = 22.41 seconds

Corect option = E.

3 0
3 years ago
What is the ph of a peach with a [ –oh] = 3.2 × 10 –11 m?
3241004551 [841]

Answer:

Amerigo Vespucci, was the first European to reach the Caribbean Islands.

Please select the best answer from the choices provided

T

F

Explanation:

7 0
2 years ago
What is the valency of element sulphur ​
NISA [10]
I am not to sure because I have not studied this
3 0
3 years ago
Read 2 more answers
How do you solve for x?​
Ad libitum [116K]

Answer:

substitution is the best method or collecting like terms

Explanation:

3 0
3 years ago
Which of the following is an examples of pseudoscience
german
Examples that have been believed to be science: such as religion, flat earth, etc.
6 0
3 years ago
Other questions:
  • What characterizes a homogeneous mixture?
    11·1 answer
  • Assuming complete dissociation, what is the pH of a 4.82 mg/L Ba(OH)2 solution?
    14·1 answer
  • 7.7. A painter leans his back against a painted wall while looking into a 1m long mirror at the opposite end of a rectangular ro
    5·1 answer
  • Will give brainliest
    8·1 answer
  • An element has atomic number 12. What is its Valenc? Will it form Cation or Anion? Is it metal or nonmetal?
    8·1 answer
  • How long will it take a piece of strontium-90 (produced in a nuclear test blast) weighing exactly 1000.0 g to be
    8·1 answer
  • Look at the four chemical reactions. Reaction 1: 2H2 + O2 → 2H2O Reaction 2: 2NaCl → 2Na + Cl2 Reaction 3: CaO + H2O → Ca(OH)2 R
    13·1 answer
  • Consider the chemical equations shown here.
    8·1 answer
  • Guys please I need an answer for this asap
    7·1 answer
  • A 0.532 mol sample of SO2 gas requires 52.3 s to effuse through a tiny hole. Under the same conditions, how long will it take 0.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!