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
ZanzabumX [31]
3 years ago
9

Suppose a student repeats a measurement two times and then calculates the standard deviation. Because the standard deviation is

small, the student reports that their experiment was extremely precise. Is the student's conclusion appropriate?
A) No, because there were not enough measurements to use standard deviation.
B) Yes, because a small standard deviation indicates greater precision
C) Yes, because a small data set always has excellent precision
D) No, because a large standard deviation indicates greater precision
Chemistry
1 answer:
Valentin [98]3 years ago
7 0

Answer:

The correct answer is option B, that is, a small standard deviation suggests greater precision.

Explanation:

A determination of precision is a standard deviation, it is more reliable in comparison to mean deviation. The square root of the total of the squares of the deviations divided by the degree of freedom for the array of measurements is known as standard deviation.  

The precision of low standard deviation value is more as the results or observations demonstrated by the low standard deviation are more close to average.  

You might be interested in
HgS + O2 → HgO + SO2
Igoryamba

Answer:

2HgS + 3O2 → 2HgO + 2SO2

The coefficients are: 2, 3, 2, 2

Explanation:

HgS + O2 → HgO + SO2

The equation can be balance as follow:

Put 3 in front of O2 as shown below:

HgS + 3O2 → HgO + SO2

Now we can see that there are 6 atoms of O on the left side of the equation and a total of 3 atoms on the right side. It can be balance by putting 2 in front of HgO and SO2 as shown below:

HgS + 3O2 → 2HgO + 2SO2

Now we have 2 atoms of both Hg and S on the right side and 1atom each on the left. It can be balance by putting 2 in front of HgS as shown below:

2HgS + 3O2 → 2HgO + 2SO2

Now the equation is balanced.

The coefficients are: 2, 3, 2, 2

The law of conservation of mass(matter) states that matter(mass) can neither be created nor destroyed during a chemical reaction but changes from one form to another. An unbalanced equation suggests that matter has been created or destroyed. While a balanced equation proofs that matter can never be created but changes to different form. This is the more reason we have count the atoms of an element on both side of the equation to see if they are balanced irrespective of the new form they assume in the product

5 0
3 years ago
Morphine has the formula c17h19no3. it is a base and accepts one proton per molecule. it is isolated from opium. a 0.685 −g samp
kotykmax [81]
2 C₁₇H₁₉NO₃ + H₂SO₄ → Product
Moles of H₂SO₄ = M x V(liters) = 0.0116 x 8.91/1000 = 1.033 x 10⁻⁴ mole 
moles of morphine = 2 x moles of H₂SO₄ = 2.066 x 10⁻⁴
Mass of morphine = moles x molar mass of morphine = 2.066 x 10⁻⁴ x 285.34 
                             = 0.059 g
percent morphine = \frac{mass of morphine}{mass of opium} x 100
                             = \frac{0.059}{0.685} x 100 = 8.6 %   
7 0
3 years ago
What might be a possible outcome if you left a soda in a glass bottle in the freezer for a very long time?
Scrat [10]

A the soda will increase in volume

6 0
2 years ago
Which of these substances is the least acidic? solution A, pOH = 1.5 solution B, pOH = 7.0 solution C, pOH = 13.5Which of these
Usimov [2.4K]

Answer: solution A, pOH =1.5

Explanation:

3 0
3 years ago
Read 2 more answers
Which of the following is equal to 5,800,000,000 cm?
Reil [10]

Answer:

It would be 5.8 times 10^9cm

6 0
2 years ago
Other questions:
  • What is the molarity of a solution made by dissolving 21.2 g of sodium hydroxide (NaOH) in enough water to make 7.92 L of soluti
    12·2 answers
  • A chef plans to mix 100% vinegar with italian dressing. the italian dressing contains 13% vinegar. the chef wants to make 150 mi
    6·1 answer
  • Describe two tests that you can run to determine if something is a substance or a mixture.
    11·1 answer
  • A gas mixture with 4 mol of Ar, x moles of Ne, and y moles
    8·1 answer
  • What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?
    13·1 answer
  • How many atoms, ions, or molecules are in a 1 molar solution?
    11·1 answer
  • What is the mass of 3.2 moles of h2O ?
    6·1 answer
  • 2. A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g.
    5·1 answer
  • You observe mothballs disappearing in cabinets. What do you think is the reason for this? Do all substances behave like mothball
    5·1 answer
  • Give the formulas for the following
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!