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
Ainat [17]
3 years ago
7

For a reaction to occur, energy must be _____ to break chemical bonds.

Chemistry
2 answers:
hichkok12 [17]3 years ago
7 0

Answer: Option (C) is the correct answer.

Explanation:

When energy is absorbed in a chemical reaction then chemical bonds tend to break and cool the surroundings. This type of reaction is known as endothermic reaction.

For example, melting of ice cubes is an endothermic reaction.

Whereas when energy is released in a chemical reaction then it is because atoms come close to each other. This type of reaction is known as exothermic reaction.

Therefore, we can conclude that out of the given options, for a reaction to occur, energy must be absorbed to break chemical bonds.

lapo4ka [179]3 years ago
6 0

Answer: The correct answer is absorbed.

Explanation:

Bond formation is a type of exothermic process. In these reactions when two atoms come close to each other, energy is released in this process.

On the other hand, in the breaking of bond, energy is required because the atoms are to be separated from each other. This is a type of endothermic process. So, the energy must be absorbed.

Hence, the correct answer is absorbed.

You might be interested in
A sample of 5.00 mol of gas in a 10.00 L container is at 45.0 °C. What is the pressure of the gas?
katrin2010 [14]

Answer:

The pressure of the gas is 13, 04 atm.

Explanation:

We use deal gas formula. First, we convert the unit of temperature in Celsius into Kelvin. We use the constant R= 0,082 l atm /K mol.Then, we solve P (pressure).

0°C=273 K   45°C= 273 + 45= 318 K

PV=nRT   -----> P= (nRT)/V

P= (5 mol x 0,082 l atm /K mol x 318 K)/ 10 L

<em>P= 13,038 atm</em>

6 0
3 years ago
In a coffee-cup calorimeter, 100.0 g of H2O and 100.0 mL of 1M HCl are mixed. The HCl had an initial temperature of 44.6 C and t
Hatshy [7]

Answer:

Exothermic reaction for the HCl, endothermic reaction for the water

2803.28\ \text{J}

Explanation:

Heat was lost by HCl as its temperature lowered, so it was an exothermic reaction for the HCL.

Heat was gained by water as its temperature increased, so it was an endothermic reaction for the water.

m = Mass of water = 100 g

c = Specific heat of water = 4184\ \text{J/kg}^{\circ}\text{C}

\Delta T = Change in temperature of water = (31.3-24.6)^{\circ}\text{C}

Heat is given by

Q=mc\Delta T\\ =0.1\times 4184\times (31.3-24.6)\\ =2803.28\ \text{J}

Heat gained by water is 2803.28\ \text{J}.

5 0
3 years ago
a square boat made from iron has overall dimensions of 2.00 cm x 11.0 cm x 11.0 cm. it has a mass of 213 g. what is its density
Rus_ich [418]
Volume:

2.00 x 11.0 x 11.0 => 242 cm³

mass : 213 g

D = m / V

D = 213 / 242

D = 0.880 g/cm³

Answer B

hope this helps!
5 0
3 years ago
Read 2 more answers
There are 2 gasses, A, B. They weigh 2.46g and 0.5g respectively, and the Volume of A is 3 times the volume of B. A has a molecu
dangina [55]

Answer:

B

Explanation:

molecular mass of B is 28

8 0
2 years ago
Read 2 more answers
7) Convert 8.34 x 10^-6 Kg to cg"
marusya05 [52]
The answer is .00834 cg hopefully this helped
5 0
3 years ago
Other questions:
  • Consider the mechanism. Step 1: A+B↽−−⇀CA+B↽−−⇀C equilibrium Step 2: C+A⟶DC+A⟶D slow Overall: 2A+B⟶D2A+B⟶D Determine the rate la
    13·1 answer
  • Been struggling with this question for a while, some help will be appreciated :)
    5·1 answer
  • The acid HOCl (hypochlorous acid) is produced by bubbling chlorine gas through a suspension of solid mercury(II) oxide particles
    15·1 answer
  • A 8 g object displaces 50 mL of water. What is its specific gravity?
    9·2 answers
  • Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different i
    8·1 answer
  • Please hurry!!!!!
    10·1 answer
  • The mass of the sun<br> what is the mass of the sun
    11·2 answers
  • If you go to the moon, what will happen to your weight and mass?
    12·1 answer
  • PLEASE HELP ME WITH THIS I ONLY HAVE 8 MINUTES I will give you extra points . NUMBER 6
    10·2 answers
  • Suppose you found an unknown substance in a laboratory. It has the formula H2O2 written on the bottle. Is it water? How do you k
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!