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
nevsk [136]
2 years ago
8

Which phrase best describes activation energy? (1 point)

Chemistry
1 answer:
iren [92.7K]2 years ago
8 0

Answer: the minimum amount of energy required to break bonds and start a chemical reaction

Explanation: got a 100% on the quick check

You might be interested in
When you mixed 20 grams of magnesium and an excess of nitric acid, 1.7 grams of hydrogen was actually produced. What is the perc
Kitty [74]
Based on the balanced chemical reaction presented above, every mole of magnesium (Mg) yields one mole of diatomic hydrogen (H2). When converted to masses, every 24.3 grams of magnesium yields 2 grams of hydrogen. 

From the given, there are 20 grams of magnesium available for the reaction. With this amount, the expected yield of hydrogen is 1.646 grams. To calculate the percent yield, divide the actual yield to the hypothetical yield.

*The case is impossible because the actual yield is greater than the theoretical yield.

If we assume that there had been a typographical error and that the actual yield is 0.7 grams instead of 1.7 grams, the percent yield becomes 42.5%. Thus, the answer is letter E. 
6 0
3 years ago
Read 2 more answers
What is the mass number of an ion with 106 electrons, 157 neutrons, and a +1 charge?
il63 [147K]

Answer:

264 g/mol

Explanation:

#electrons equal #protons = 106

Plus 1 charge => m protons = 106 + 1 = 107

Mass number: 107 + 157 = 264 g/mol

5 0
3 years ago
Which of the following is not a characteristic of life?
Sophie [7]

Answer:

C

Explanation:

Well movement is, reproduction is, responsiveness is, metabolism is, so accumulation would be the answer.

7 0
3 years ago
For an exothermic reaction, what effect will increasing the temperature have on the equilibrium?
VLD [36.1K]
The result of an exothermic reaction is released heat. According the Le Chatelier's principle, increasing<span> the </span>temperature means increasing<span> the amount of products. This means that </span><span> there will be more reactants left at equilibrium.</span>
5 0
3 years ago
Match the layer of the earth with the correct description. Group of answer choices
Burka [1]

Answer:

asthenosphere- strong,lower mantle made of dense rock.

inner core-made of solid,dense iron and nickel

lithosphere-Thin,outermost layer that is divided into

tectonic plates.

Mesosphete-layer of weak,soft rock in upper mantle that flows in convection current's.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Look at the reaction below.
    8·2 answers
  • What is the compound name for the formula [Ru(en)2Cl2]2+ and [Co(en)Cl2Br]-
    12·1 answer
  • If a solution containing 80.701 g80.701 g of mercury(II) perchlorate is allowed to react completely with a solution containing 1
    5·1 answer
  • What are the raw materials/reactants and products of photosynthesis
    6·1 answer
  • Identify the group of elements that does not readily combine with other elements.
    11·1 answer
  • 2.What is the chemical formula<br> for ammonium nitrite
    13·1 answer
  • Match the formula for the following compound: 
    7·2 answers
  • What would the final salt concentration be if instead of placing the dialysis bag in 4.0 L of distilled water for 12 h, you plac
    7·1 answer
  • What is the mole ratio of the following equation?
    9·1 answer
  • When classified, all living things have
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!