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
ra1l [238]
3 years ago
14

A student estimated the volume of a liquid in a beaker as 200.0 mL. When she poured the liquid into a graduated cylinder she MEA

SURED the volume to be 198.2 mL. What is the percent error?
Chemistry
1 answer:
Taya2010 [7]3 years ago
6 0

Answer:

<h3>The answer is 0.91 %</h3>

Explanation:

The percentage error of a certain measurement can be found by using the formula

P(\%) =  \frac{error}{actual \:  \: number}  \times 100\% \\

From the question

actual volume = 198.2 mL

error = 200 - 198.2 = 1.8

So we have

P(\%) =  \frac{1.8}{198.2}  \times 100 \\  = 0.90817356205...

We have the final answer as

<h3>0.91 %</h3>

Hope this helps you

You might be interested in
Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici
irina1246 [14]

Answer:

                     2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Explanation:

Step 1: Write the unbalanced chemical equation,

                          C₄H₁₀ + O₂ → CO₂ + H₂O

Step 2: Balance Carbon  Atoms;

As there are 4 carbon  atoms on left hand side and 1 carbon atoms on right hand site therefore, to balance them multiply CO₂ on right hand side by 4 i.e.

                            C₄H₁₀ + O₂ → 4 CO₂ + H₂O

Step 3: Balance Hydrogen Atoms;

There are 10 hydrogen atoms on left hand side and 2 hydrogen atom on right hand site therefore, to balance them multiply H₂O on left hand side by 5 i.e.

                            C₄H₁₀ + O₂ → 4 CO₂ +  5 H₂O

Step 4: Balance Oxygen Atoms:

Now there are 2 oxygen atoms in reactant side and 13 in product side. So, multiply O₂ by 6.5 i.e.

                            C₄H₁₀ + 6.5 O₂ → 4 CO₂ + 5 H₂O

Step 5: Remove fraction coefficients as,

Multiply whole equation by 2 to get rid of fractions i.e.

                            2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

7 0
3 years ago
Non-metal ions are negative because...
abruzzese [7]

Explanation:

its b cz the gain electrons i think

6 0
3 years ago
An exothermic reaction is conducted in an insulated calorimeter filled with water. The calorimeter is then sealed so that there
Vaselesa [24]
Answer: option <span>C. the total energy inside the calorimeter will decrease.
</span>

Justification:

The answer is a direct application of the first law of thermodynamic (the law of conservation of energy).

By telling that the t<span>he calorimeter is sealed so that there is no heat exchanged between the contents of the container and the surrounding air, the first law of thermodynamics implies that the total energy inside the calorimeter will not change.
</span>

<span>That statement, without adding any more is enough justification.
</span>

Regarding, the other statements, you can show they are true:

<span>A. the thermometer will show an increase in temperature.
</span><span>
</span><span>
</span><span>Since the reaction is exothermic, the heat released will increase the temperature inside the sealed calorimeter,which, of course, is shown by the termometer.
</span><span>
</span><span>
</span><span>
</span><span>B. The potential energy of the products will be lower than that of the reactants.
</span><span>
</span><span>
</span><span>In any exothermic reaction, the potential energy of the products is lower than that of the reactants, because the heat released is lost by the reactants when they react and transform into the products.
</span><span>
</span><span>
</span><span>D. The water increases in temperature as the reaction gives off heat</span>.

Sure. The heat cannot leave the sealed calorimeter, but the water inside the calorimeter will absorb that heat: the molecules of water will gain kinetic energy and so its temperature will be increase.

6 0
3 years ago
If an acid has a Ka of 4.3 × 10-7 and a base has a Kb of 5.6 × 10-4, then what will be true about the salt produced? A. The salt
blsea [12.9K]

If an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴, then the true statement about the salt produced is that the salt would decrease the pH of the solution.

<h3>What is acid and base constant?</h3>

An acid dissociation constant, Kₐ, is a quantitative measure of the strength of an acid in solution while Kb indicates the high level of dissociation of a strong base.

According to this question, an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴. This shows that the strength of the base is higher than that of the acid.

Therefore, if an acid has a Ka of 4.3 × 10-⁷ and a base has a Kb of 5.6 × 10-⁴, then the true statement about the salt produced is that the salt would decrease the pH of the solution.

Learn more about Ka at: brainly.com/question/16035742

#SPJ1

7 0
2 years ago
The best way to reduce air pollution is to _____.
NARA [144]
I would say carpool why because you don't know what the hybrid car runs on
<span />
4 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the cell pt | h2 (1 atm); h+ (? m) || hg2cl2(s); cl− (1 m) | hg 2 h+ + 2 e − → h2 e 0 = 0.00 v hg2cl2 + 2 e − → 2 hg +
    12·2 answers
  • CH4 (g) yields C(g) + 4H (g) (reaction for expansion)
    8·2 answers
  • Why is burning wood a chemical change?
    13·1 answer
  • What makes some collisions elastic and others inelastic
    9·2 answers
  • A sample of 19 mg of 9-fluorenone is dissolved in 5 mL of diethyl ether. The resulting organic
    15·1 answer
  • PLEASE HELP ASAP!!! science
    14·2 answers
  • Which is a substance that could be found in air , water , or soil that is harmful to humans or animals?
    8·2 answers
  • If 100 ml of a 0.5 M HCI Solution is diluted with water to 1000ml, what is the new concetration?
    11·1 answer
  • Rectangular prism has a height of 3cm, a width of 7 cm, and a length of 5 cm. What is it's volume?
    8·1 answer
  • Based on table n, uranium-238 and uranium-235 have different
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!