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
Step2247 [10]
2 years ago
13

In data measurement, what does precision refer to?

Chemistry
1 answer:
igor_vitrenko [27]2 years ago
7 0
Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Therefore, your answer is (B)
You might be interested in
The enthalpy of vaporization of water is 2,257,000 J/kg. If I have a 1 kg sample, how much energy is needed to boil all of it
worty [1.4K]

Answer:

2257000 J

Explanation:

Applying,

Q = Cₓm.................. Equation 1

Where Q = amount of energy need to boil the water, Cₓ = Enthalpy of vaporization of water, m = mass of water.

From the question,

Given: Cₓ = 2257000 J/kg, m = 1 kg

Substitute these values into equation 1

Q = 2257000×1

Q = 2257000 J

Hence the energy needed to boil all of the water is 2257000 J

8 0
3 years ago
A 6.35 l sample of carbon monoxide is collected at 55.0◦c and 0.892 atm. What volume will the gas occupy at 1.05 atm and 59.0◦c?
Sonja [21]

Answer : The final volume of gas will be, 5.46 L

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.892 atm

P_2 = final pressure of gas = 1.05 atm

V_1 = initial volume of gas = 6.35 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 55.0^oC=273+55.0=328K

T_2 = final temperature of gas = 59.0^oC=273+59.0=332K

Now put all the given values in the above equation, we get:

\frac{0.892atm\times 6.35L}{328K}=\frac{1.05atm\times V_2}{332K}

V_2=5.46L

Thus, the final volume of gas will be, 5.46 L

7 0
3 years ago
What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers?
tankabanditka [31]

Answer:

the correct answer is 6...

5 0
3 years ago
Read 2 more answers
Write nuclear symbols for each of the isotopes Carbon-14 Cobalt-60 Gold-197 Uranium-235
Marina CMI [18]

Answer and explanation:

The nuclides with the same atomic number, but different mass numbers are isotopes.

So, in this case, each species will have the same atomic number and a different mass number, that will be the same that it is written in the name of the element:

\begin{gathered} -\text{ Carbon-14:}C_6^{14} \\  \\ -\text{ Cobalt-60: }Co_{27}^{60} \\  \\ -\text{ Gold-197:  }Au_{79}^{197} \\  \\ -\text{ Uranium-235: }U_{92}^{235} \end{gathered}

5 0
1 year ago
Two examples of decomposers​
Eddi Din [679]

Fungi and bacteria-- mushrooms, bacteria, mold...

5 0
3 years ago
Read 2 more answers
Other questions:
  • Sugar costs $0.98/kg. 1 metric ton=1000 kg. How many metric tons of sugar can
    6·1 answer
  • _______ rock can be changed directly into _______ rock with the application of heat and pressure.
    8·1 answer
  • Do you always have to begin with two compounds in a neutralization reaction
    11·1 answer
  • What is the measure of how quickly the velocity of an object changes
    12·1 answer
  • What type of chemical reaction might be confused with the synthesis reaction in part 1, and how can you distinguish these two re
    13·1 answer
  • What is the relationship between a white dwarf and black dwarf?
    9·2 answers
  • True or False
    9·2 answers
  • What is the difference b/w synthesis reaction and combination reaction​
    14·2 answers
  • In the Haber reaction, patented by German chemist Fritz Haber in 1908, dinitrogen gas combines with dihydrogen gas to produce ga
    10·1 answer
  • How many molecules of nitrogen gas are found in 0. 045 L of nitrogen gas at STP?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!