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
Maurinko [17]
3 years ago
11

Precision Problems:

Chemistry
1 answer:
Lorico [155]3 years ago
4 0

Answer:

Precision = 2.70 \± 0.1\ cm

Explanation:

Given

The data in the table

Required

Follow the steps appended to the question;

Step 1: Calculate the Mean or Average

Mean = Summation of lengths divided by number of teams;

Mean = \frac{2.65 + 2.75 + 2.80 + 2.77 + 2.60 + 2.65 + 2.68}{7}\ cm

Mean = \frac{18.9}{7}\ cm

Mean = 2.70\ cm

Step 2: Get The Range

Range = Highest - Lowest

Range = 2.80cm - 2.60cm

Range = 0.2\ cm

Step 3: Divide Range by 2

Approximate\ Range = \frac{1}{2}Range

Approximate\ Range = \frac{1}{2} * 0.2\ cm

Approximate\ Range = 0.1\ cm

Step 4: Determine the Precision

Precision = Average \± Approximate\ Range

Substitute 2.70 for Average and 0.1 for Approximate Range

Precision = 2.70 \± 0.1\ cm

You might be interested in
What is the total number of hydrogen atoms in a molecule of heptyne?
Step2247 [10]

Answer:

12

Explanation:

alkyne formula is CnH2n-2

heptyne = 7

6 0
3 years ago
Which geologic time did humans exist
umka2103 [35]

Answer:

B

Explanation:

because its says mesozoic era

4 0
3 years ago
Read 2 more answers
If the total mass of the products of a reaction is 90 gram, what was the total mass of the reactants
Marizza181 [45]
90 grams due to laws of conservation of mass. Output mass = input mass. Mass can never be created or destroyed.

4 0
3 years ago
How many atoms of each element are in one molecule of this product.
anastassius [24]
I assume about 5 atoms are in one molecule of this product
7 0
3 years ago
Convert from moles to particles 6.02x1023 particles 1 mole Question 2. 2.7 moles of lithium Question 3. 1.8 moles of sodium chlo
spayn [35]

Considering the definition of Avogadro's number:

  • the number of molecules of lithium is 1.62621×10²⁴ molecules.
  • the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.

<h3>Definition of Avogadro's number</h3>

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

<h3>Amount of molecules in this case</h3>

You can apply the following rule of three, considering the Avogadro's number:  If 1 mole of lithium contains 6.023×10²³ molecules, 2.7 moles of lithium contains how many molecules?

amount of molecules of lithium= (6.023×10²³ molecules × 2.7 moles)÷1 mole

<u><em>amount of molecules of lithium=1.62621×10²⁴ molecules</em></u>

Finally, the number of molecules of lithium is 1.62621×10²⁴ molecules.

On the other hand you can apply the following rule of three, considering the Avogadro's number:  If 1 mole of sodium chloride​ contains 6.023×10²³ molecules, 1.8 moles of  sodium chloride​ contains how many molecules?

amount of molecules of sodium chloride= (6.023×10²³ molecules × 1.8 moles)÷1 mole

<u><em>amount of molecules of sodium chloride=1.08414 ×10²⁴ molecules</em></u>

Finally, the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.

Learn more about Avogadro's Number:

brainly.com/question/11907018

brainly.com/question/1445383

brainly.com/question/1528951

#SPJ1

4 0
2 years ago
Other questions:
  • (CH3)2N2H2 + N2O4 → N2 + H2O + CO2 + heat [balance?]​
    14·1 answer
  • Consider the following intermediate chemical equations. When you form the final chemical equation, what should you do with CO? C
    10·1 answer
  • Which one of the following does not represent 1.000 mol of the indicated
    10·2 answers
  • Copper(II) sulfate forms a bright blue hydrate with the formula CuSO 4 ⋅ n H 2 O ( s ) . If this hydrate is heated to a high eno
    8·1 answer
  • If i rub a balloon on a piece of paper then hold it against my head my hair will stand up why is that?
    11·1 answer
  • Please Help ASAP 100 points! Students set up a controlled experiment. They put five crickets in each of three identical containe
    7·2 answers
  • I have 3 questions i'm curious about *SCIENCE*
    14·1 answer
  • How much DNA can be extracted from an onion
    11·1 answer
  • Taylor has $30,00 card that she con spend the store She already bought $9.00 ploture frame, she wants to $2.00 Journals with the
    9·1 answer
  • Is this a good college to go
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!