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
asambeis [7]
3 years ago
9

What must be part of a quantitative observation?

Chemistry
2 answers:
ziro4ka [17]3 years ago
6 0

Answer:

Quantitative observation is a method used by researchers to collect data using numerical methods such as age, weight, height. The results of this type of observation can be analyses using statistics and numerical analysis. What should be included in a quantitative observation include:

  • Numerical instruments
  • Sample
  • Statistical analysis
  • Accuracy
  • Reliability and validity
  • Bias-free/numerical results

Explanation:

Likurg_2 [28]3 years ago
4 0

Quantitative observations include numerical data. Ex: 32 degrees, 10 inches, etc.

You might be interested in
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 8.00 g of octane is m
DerKrebs [107]

Answer:

11.3 g of H₂O will be produced.

Explanation:

The combustion is:

2C₈H₁₈ +  25O₂→  16CO₂  +  18H₂O

First of all, we determine the moles of the reactants in order to find out the limiting reactant.

8 g / 114g/mol = 0.0701 moles of octane

37g / 32 g/mol = 1.15 moles of oxygen

The limiting reagent is the octane. Let's see it by this rule of three:

25 moles of oxygen react to 2 moles of octane so  

1.15 moles of oxygen will react to ( 1.15 . 2)/ 25 = 0.092 moles of octane.

We do not have enough octane, we need 0.092 moles and we have 0.0701 moles. Now we work with the stoichiometry of the reaction so we make this rule of three:

2 moles of octane produce 18 moles of water

Then 0.0701 moles of octane may produce (0.0701 . 18)/2= 0.631 moles of water.

We convert the moles to mass → 0.631 mol . 18 g/1mol = 11.3 g of H₂O will be produced.

4 0
3 years ago
A covalent bond is best described as ______(A) a bond between two polyatomic ions.(B) a bond between a metal and a nonmetal.(C)
nekit [7.7K]

Answer:

Option C. the sharing of electrons between atoms

Explanation:

Covalent bond is a type of bond in which the reacting element share their valence electrons in order to attain the noble gas configuration.

4 0
3 years ago
What makes matter change from one state to another?
posledela

Answer: Adding or removing energy from matter

Explanation:

4 0
2 years ago
A gas sample is held at constant temperature. What happens to the pressure of the sample if the volume is doubled and the number
Iteru [2.4K]

Answer:

If the volume is doubled and the number of molecules is doubled, pressure is unchanged

Explanation:

Step 1: Data given

Temperature = constant

Volume will be doubled

Number of molecules will be doubles

Step 2:

p*V = n*R*T

⇒ gas constant and temperature are constant

Initial pressure = n*R*T / V

Initial pressure = 2*R*T/2

Initial pressure =  RT

Final pressure = 4*RT / 4

Final pressure = R*T

If the volume is doubled and the number of molecules is doubled, pressure is unchanged

3 0
3 years ago
If a tube is 2.2 meters in length, how long is the the tube in feet ?​
trapecia [35]

Answer:

7.22 feet long

Explanation:

1 meter = 3.28084 feet

2.2 × 3.28084 = 7.2<u>1</u>785

= 7.22

I hope this is helpful :)

3 0
3 years ago
Other questions:
  • Acetic acid is a weak acid with a pKa of 4.76. What is the concentration of acetic acid in a buffer solution of 0.2M at pH 4.9.
    5·1 answer
  • Ground water has some minerals dissolved in it. If you heat this water, collect the vapor in another container, and then cool it
    5·2 answers
  • What is traveling through electric lines?<br> 1.Protons <br> 2.Electrons<br> 3.Neutrons
    11·2 answers
  • The melting and boiling points of a substance are independent of
    8·2 answers
  • 6.54g is how many mg
    8·1 answer
  • What is the independent and dependent<br> variable for a dry ice experiment
    15·1 answer
  • Which of these is a difference between a single skin cell and the skin tissue that covers an entire hand?
    7·2 answers
  • I WILL GIVE BRAINLIEST IF IT IS CORRECT
    14·1 answer
  • Which is the BEST definition for a chemical ? *
    10·1 answer
  • Help please giving brainliest!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!