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
Burka [1]
2 years ago
11

Developing countries use many more resources than do developed countries. True False

Chemistry
1 answer:
Svetach [21]2 years ago
8 0
I will have to say that this statement is true
You might be interested in
The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the limiti
nadezda [96]

Answer:

The limiting reactant is the propane gas, C₃H₈ while the percentage yield is 83.77%

Explanation:

Here we have

Propane gas with molecular formula C₃H₈, molar mass  = 44.1 g/mol combining with O₂ as follows

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Therefore, 1 mole of C₃H₈  combines with 5 moles of O₂ to produce 3 moles CO₂ and 4 moles of H₂O

Mass of propane = 0.1240 kg = 124.0 g

Number of moles of propane = mass of propane/(molar mass of propane)

The number of moles of propane = 124/44.1 = 2.812 moles

The molar mass of CO₂ = 44.01 g/mol

Mass of CO₂ = 0.3110 kg = 311.0 g

Therefore, number of moles of CO₂ = mass of CO₂/(molar mass of CO₂)

The number of moles of CO₂ = 311.0 kg/ 44.01 g/mol = 7.067 moles

Therefore, since 1 mole of propane produces 3 moles of CO₂, 2.812 moles of propane will produce 3 × 2.812 moles or 8.44 moles of CO₂

Therefore;

The limiting reactant is the propane gas, C₃H₈, since the oxygen is in excess

Hence

The \ percentage \ yield = \frac{Actual \, yield}{Theoretical \, yield} \times 100 = \frac{7.067}{8.44} \times 100 = 83.77 \%

The percentage yield = 83.77%.

7 0
3 years ago
In scientific notation, 213,000 is equal to
kirza4 [7]
2.13 x 10^5 I think.
5 0
3 years ago
Read 2 more answers
18. give the product for the following reactions sequence. a) 3-pentanone b) 2-pentanone c) propanone d) 2-butanone e) methyl pr
serg [7]

The product for the following reaction are :

  • 2 - butanone
  • CH₃CH₂COCl
  • CH₃CH₂CONHCH₃

T carboxylic acid is an organic compound. the functional group of carboxylic acid is carboxy. general formula is given as : R - COO⁻.

The reactions are given as follows :

1) the reduction of carboxylic acid into ketone with the organometallic compound is given as follows :

CH₃CH₂COOH     +  CH₃Li   ------>   CH₃CH₂COCH₃

                                                                  2 butanone

2) the reaction of carboxylic acid with SOCl₂ is given as follows :

CH₃CH₂COOH    +   SOCl₂   ----->   CH₃CH₂COCl

3) the reaction of carboxylic acid with CH₃NH₂ is given as follows

CH₃CH₂COOH  +   CH₃NH₂   ----->   CH₃CH₂CONHCH₃

Thus,  The product for the following reaction are :

  • 2 - butanone
  • CH₃CH₂COCl
  • CH₃CH₂CONHCH₃

To learn more about carboxylic acid here

brainly.com/question/4721247

#SPJ4

5 0
1 year ago
What does the root word “atom” mean and why is that not an accurate name
Maksim231197 [3]

Answer:

Explanation:

The concept of the atom originated round 440 BC. Leucippus of Miletus came up with the idea. ... Atoms were impenetrably hard, meaning they could not be divided. In Greek, the prefix "a" means "not" and the word "tomos" means cut. Our word atom therefore comes from atomos, a Greek word meaning uncuttable.

4 0
2 years ago
Read 2 more answers
Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 hours. If 50.0 mg of I-123 were prepared
cupoosta [38]

Answer: 12.5 mg

Explanation:

The half-life of Iodine -123 is 13 hours.

Between 8 am on Monday and 10 am on Tuesday will be 26 hours.

After the first 13 hours, the Iodine should be left with half of its initial quantity

= 50/2

= 25 mg

There are now 13 hours remaining meaning that the Iodine will be half of the 25mg after that period.

= 25/2

= 12.5 mg.

12.5 mg remain at 10 am the next day.

Please do react or comment if you need any clarification or if the answer helped you. This would help other users as well. Thank you.

6 0
3 years ago
Other questions:
  • Which of the following statements is true? Water (H2O) is an element. A golf ball has a larger volume than a baseball. Most of t
    14·2 answers
  • A certain substance X has a normal boiling point of 134.5°C and a molal boiling point elevation constant =Kb1.36·°C·kgmol−1 . Ca
    6·1 answer
  • Write a balanced equation for the transmutation that occurs when a scandium-48 nucleus undergoes beta decay.
    15·1 answer
  • Arrange the following oxides in order of increasing acidity.
    11·1 answer
  • Which element shares the most characteristics with carbon (C)?
    6·2 answers
  • What would happen to the annual rates of limestone (CaCO3) precipitation in the ocean if the ocean water were to become much war
    8·1 answer
  • Please help last assignment of the day
    13·1 answer
  • SITUATION # 2: Every morning we drink milk to strengthen our bones. You
    6·1 answer
  • The density of NaCl( s) is 2.165 g cm 3 at 25 C. How will the solubility of NaCl in water be affected by an increase in pressure
    5·1 answer
  • What does absolute zero physically mean at the particle level? <br> ASAP!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!