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
Alla [95]
3 years ago
14

Abigail obtained 18.9 grams of calcium carbonate after performing a reaction. From her calculations, she knew she should have ob

tained 9.9 grams. What was her percent error? Round your answer to one place behind the decimal. Do not include the unit.
Chemistry
1 answer:
zysi [14]3 years ago
5 0

Answer:Percent error= 90.9%

Explanation:

Percent error or percentage error is defined as the  percentage of the  difference between a measured value usually from an experiment and an exact  value in comparison to the exact number.

its formula is thus

Percent error = experimental value - exact or actual value /exact value x 100

=(18.9 - 9.9 /9.9 ) x 100= 9/9.9) x 100

0.909 x 100 = 90.90 = 90.9%

You might be interested in
Which isomer of 1-bromo-4-tert-butylcyclohexane reacts faster when refluxed with potassium tert-butoxide?
grigory [225]

Answer:

See explanation.

Explanation:

Since potassium tert-butoxide is a strong bulky base, we expect that an elimination reaction predominates.

This reaction is expected to occur by E2 mechanism. The cis isomer of  1-bromo-4-tert-butylcyclohexane is known to react faster by E2 mechanism because it fulfills the anticoplanar arrangement required for for E2 mechanism, where the leaving group and adjacent proton must be anti to each other and in the same plane. The trans isomer can not fulfill this requirement.

7 0
3 years ago
A 7.12 L cylinder contains 1.21 mol of gas A and 4.94 mol of gas B, at a temperature of 28.1 °C. Calculate the partial pressure
GenaCL600 [577]

Answer:

P_A=4.20atm\\\\P_B=17.1atm

Explanation:

Hello!

In this case, since the equation for the ideal gas is:

PV=nRT

For each gas, given the total volume, temperature (28.1+273.15=301.25K) and moles, we can easily compute the partial pressure as shown below:

P_A=\frac{n_ART}{V} =\frac{1.21mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_A=4.20atm\\\\P_B=\frac{n_BRT}{V} =\frac{4.94mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_B=17.1atm

Best regards!

8 0
3 years ago
What is the SI unit for acceleration?
aivan3 [116]

Answer: m/s^2 (metre per second square)

Explanation:

Acceleration is the rate of change in velocity per unit time. The standard unit of measurement for acceleration is m/s^2 (metre per second square).

It can be derived from:

Acceleration = velocity / Time

Acceleration = (metre per second / second)

Acceleration = metre per second square.

In short form, it is written as m/s^2

7 0
3 years ago
What is the electron configuration of Ba
Marizza181 [45]
(Xe) 6s2 is the ec of ba
4 0
3 years ago
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:
cupoosta [38]
MgO
MgI2
PbO2
PbI4

These are the possible compounds
4 0
4 years ago
Read 2 more answers
Other questions:
  • How many of the elements in the second row of the periodic table (li through ne) will have at least one unpaired electron in the
    15·1 answer
  • Zinc metal reacts with hydrochloric acid to produce zinc(II) chloride and hydrogen gas. How many liters of hydrogen gas will be
    12·1 answer
  • What alkene gives a mixture of acetone and propanoic acid on reaction with potassium permanganate in the presence of strong acid
    12·1 answer
  • In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
    10·1 answer
  • A certain compound is made up of one phosphorus (P) atom, three chlorine (Cl) atoms, and one oxygen (O) atom. What is the chemic
    15·2 answers
  • What element from the "Periodic Table" is named after an "Austrian Scientist"??
    15·1 answer
  • The validity of scientific theories and laws depends on evidence. Which of the following statements of evidence supports a law r
    10·2 answers
  • Iron + --> iron sulphate + copper What is missing ? Iron sulphate Copper sulphate Copper oxideIron oxide
    14·1 answer
  • The elements Lithium (Li), Boron (B), and Oxygen (O) are all in the same _________ on the periodic table.
    15·1 answer
  • Predict the product(s) and write a balanced equation for each of the following redox reactions:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!