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
Vedmedyk [2.9K]
3 years ago
8

In a labratory activity the density of a sample of vanadium is determined to be 6.9g/cm^3 at room temperature. what is the perce

nt error for the determined value?
answers:
a : 0.15%
b : 0.87%
c : 13%
d : 15%

PLEASE EXPLAIN! please
Chemistry
1 answer:
Snowcat [4.5K]3 years ago
7 0

Answer:

c : 13%

Explanation:

Data Give:

Experimental density of vanadium = 6.9 g/cm³

percent error = ?

Solution:

Formula used to calculate % error

  % error = [experimental value -accepted value/accepted value] x 100

The reported accepted density value for vanadium = 6.11 g/cm³

Put value in the above equation

                  % error = [ 6.9 - 6.11 / 6.11 ] x 100

                  % error = [ 0.79 / 6.11 ] x 100

                  % error = [ 0.129] x 100

                  % error = 12.9

Round to the 2 significant figure

% error = 13 %

So, option c is correct            

You might be interested in
In the following equation, ______ is being oxidized and ______ is being reduced.
Mashcka [7]

oxidation \: number \: of \: oxygen =  \\ before \: rxn =  - 2 \\ after \: rxn =  - 2

oxidation \: number \: of \: hydrogen = \\ before \: rxn =  + 1 \\ after \: rxn =  \\ 2x - 2 = 0 \\ x =  + 1

oxidation \: number \: of \: carbon =  \\ before \: rxn =  \\ x  - 6 =  - 2 \\ x = 4 \\ after \: rxn =  \\ x - 4 = 0 \\ x = 4

<h2>Option A</h2>

oxidation \: numbers \: remain \: constant \\ so \: none \:a re \: undergoing \: oxidation \: \\ nor \: reduction \:

6 0
1 year ago
Convertir 6,79kg a dg
Salsk061 [2.6K]

Answer:

can you explain the question

8 0
2 years ago
29.47 mL of a solution of the acid HBr is titrated, and 72.90 mL of 0.2500-M NaOH is required to reach the equivalence point. Ca
Klio2033 [76]

The original concentration of the acid solution is 6.175 \times 10^-4 mol / L.

<u>Explanation:</u>

Concentration is the ratio of solute in a solution to either solvent or total solution. It is expressed in terms of mass per unit volume

                        HBr + NaOH -----> NaBr + H2O

There is a 1:1 equivalence with acid and base.

Moles of NaOH = 72.90 \times 10^-3 \times 0.25

                          = 0.0182 mol.

[ HBr ] = moles of base / volume of a solution

          = 0.0182 / 29.47

          = 6.175 \times 10^-4 mol / L.

4 0
2 years ago
How many liters of volume is one mole of gas at standard temperature and<br> pressure?
horsena [70]

22.7 liters

The molar volume of an ideal gas depends on the temperature and pressure. One mole of any ideal gas occupies 22.7 liters at 0 0C and 1 bar (STP).

Hope this helped

3 0
2 years ago
One of the most popular club drugs. Originally patented as an appetite suppressant, this
FinnZ [79.3K]

Answer:

Ecstasy,LSD, Rohypnol

7 0
2 years ago
Other questions:
  • Spacing is often important in the name of a compound. For example, carboxylic acids are named using the parent carbon chain (wit
    7·2 answers
  • The hypothesis states that the fraction of radioactive nuclei after N half-lives is 0.5n.
    5·2 answers
  • how emissions, such as sulfur dioxide, nitrogen oxides or carbon dioxide from power plants contribute to the making of ozone?
    13·1 answer
  • WILL MARK BRAINLIEST AND THANK YOU!! PLEASE HELP!!!
    11·1 answer
  • When nitrogen and magnesium form an ionic bond, what is the formula?
    14·1 answer
  • Find the volume of a cube of zinc with the following dimensions 3.000 cm 3.1 cm 2.99 cm
    8·1 answer
  • A student mixes a solution of lead (II) nitrate with a solution of potassium iodide and notices the formation of a yellow solid.
    8·1 answer
  • A chemist uses hot hydrogen gas to convert chromium(III) oxide to pure chromium. How many grams of hydrogen are needed to conver
    10·1 answer
  • How do we determine the volume of an irreguler shaped object?
    13·1 answer
  • What do you think is the coldest temperature something can get to? What limits how cold something can get?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!