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
BartSMP [9]
3 years ago
10

Why do scientific experiments need to be repeated?

Chemistry
2 answers:
guapka [62]3 years ago
4 0

Answer:

B

Explanation:

this is called peer review and your results will be stronger

laiz [17]3 years ago
3 0

Answer:

B. To ensure that the same results are achieved every time

Explanation:

Scientific experiments must be repeated multiple times because scientists can make mistakes in their experiments, and so they need to ensure they get the same exact result each time they do it. Scientists may make a mistake that they do not see, so they have to B. To ensure that the same results are achieved every time.

You might be interested in
A compound's molecular formula must always be different than the compound's empirical formula. TRUE FALSE
Juli2301 [7.4K]

Answer: False

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

Example: CH_4 has similar molecular formula and empirical formula as the elements are already present in simplest of the ratios.

C_2H_2 has molecular formula of C_2H_2 but CH as the empirical formula.

5 0
2 years ago
What is the mass number of an ion with 107 electrons, 159 neutrons, and a +1 charge? express your answer as an integer?
Darya [45]
<span>The mass number of an ion is calculated by adding the neutrons and electrons together. In this case 159+107=266. However, since this ion has a +1 charge, you must add 1 to the electrons. This would give a total mass of 267.</span>
6 0
3 years ago
You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 mi
PIT_PIT [208]
You calculate the amount of loads of laundry as follows:

((6 x 0.25)/ load) x 10 loads = 15.00 total cost required for laundry 

<span>(6.00 / 60 min) x (75 min/shift) = 7.50 cost / shift </span>

15.00 / (7.50 / shift) = 2 loads of  laundry

Hope this answers the question.
4 0
3 years ago
Read 2 more answers
What function do mirrors serve in reflecting telescopes????
UkoKoshka [18]
Enlarge image i think
4 0
3 years ago
Explain what makes a covalently bonded molecule polar. Use the molecules of CH4 and CH3F as examples in your explanation.
RideAnS [48]

Answer:

See explanation

Explanation:

The magnitude of electronegativity difference between atoms in a bond determines whether that bond will be polar or not.

If the electronegativity difference between atoms in a bond is about 1.7, the bond is ionic. If the electronegativity difference is greater than 0.4 and less than 1.7, the bond will have a polar covalent character. Lastly, if the electronegativity difference between the bond is less than or equal to 0.4, the covalent bond is non polar.

The electronegativity difference between carbon and hydrogen is about 0.4 which corresponds to a nonpolar covalent bond hence the molecule is nonpolar.

The electronegativity difference between carbon and fluorine is about 1.5 indicating a highly polar bond. This gives CH3F an overall dipole moment thereby making the molecule polar.

8 0
2 years ago
Other questions:
  • The temperature of a liquid is 75k what is the temperature im celsius
    12·1 answer
  • What is the total number of atoms in a molecule of ch 3 oh?
    12·2 answers
  • 0.932 g/63.546 g/mol
    9·1 answer
  • What are Kr and Xe. (elements)?
    9·1 answer
  • Crystalline solids ________. a. have their particles arranged b. randomly exist only at very low temperatures c. exist only at h
    12·1 answer
  • Covalent bonds are in the air you breathe and the water you drink. How are covalent bonds formed ? A) between atoms with more el
    13·1 answer
  • What makes up an isotope’s mass number?
    13·1 answer
  • Rank the following from most metallic to least metallic:
    15·1 answer
  • Consider the molecular orbital model of benzene. In the ground state, how many molecular orbital's are filled with electrons? Se
    13·1 answer
  • Pls answer no robots
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!