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
Mumz [18]
3 years ago
12

Someone please help i don’t have much time left

Chemistry
1 answer:
REY [17]3 years ago
6 0

Answer: Energy of reactants = 30, Energy of products = 10

Exothermic

Activation energy for forward reaction is 10.

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

Energy of reactants = 30

Energy of products = 10

Thus as energy of the product < energy of the reactant, the reaction is exothermic.

Activation energy (E_a) is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

E_a for forward reaction is (40-30) = 10.

You might be interested in
Can anyone here help me with chemistry
Kay [80]
The answer is 20g N2
5 0
2 years ago
24. What volume of a 0.0200M calcium hydroxide is required to neutralize 35.00 mL of 0.0500M nitric acid
Natalka [10]

Answer:

THE VOLUME OF 0.200M CALCIUM HYDROXIDE NEEDED TO NEUTRALIZE 35 mL of 0.050 M NITRIC ACID IS 43.75 mL.

Explanation:

Using

Ca VA / Cb Vb = Na / Nb

Ca = 0.0500 M

Va = 35 mL

Cb = 0.0200 M

Vb = unknown

Na = 2

Nb = 1

Equation for the reaction:

Ca(OH)2 + 2HNO3 --------> Ca(NO3)2 + 2H2O

So therefore, we make Vb the subject of the equation and solve for it

Vb = Ca Va Nb / Cb Na

Vb = 0.0500 * 35 * 1 / 0.0200 * 2

Vb = 1.75 / 0.04

Vb = 43.75 mL

The volume of 0.02M calcium hydroxide required to neutralize 35 mL of 0.05 M nitric acid is 43.75 mL

6 0
3 years ago
Which equation is used to calculate the specific heat of the metal?
algol [13]

i dont know gjchhhhhhhhhhhhhhhhhhhhhhhhh

3 0
3 years ago
How many grams of sodium are needed to produce 12.5g of sodium oxide
Hatshy [7]

Answer:

25 possibly

Explanation:

I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25

If someone else comes up with a more convincing argument listen to them

4 0
3 years ago
Which of the following is an examples of chemical change?
aleksandrvk [35]

Answer:

Burning of paper

5 0
3 years ago
Read 2 more answers
Other questions:
  • What are 5 examples of gases found at home?
    10·2 answers
  • Is Gatorade a mixture ?<br><br><br> True <br><br> False
    6·2 answers
  • Given that the density of Hg(l) at 0°C is about 14 g mL-­1, which of the following is closest to the volume of one mole of Hg(l)
    8·1 answer
  • The atoms and molecules in a liquid are in constant motion. As temperature decreases, what is true of the particles in the liqui
    12·1 answer
  • Which options identify what the arrows in the diagram
    15·1 answer
  • Which 2 elements make up more than 80% of the atoms found in the Earth's crust​
    14·1 answer
  • A swimmer swims 50. Lengths of a pool each day. The pool is 30 meters long. What distance does she swim each day in meters
    7·1 answer
  • Matter is anything that has mass. What is the smallest unit of matter known as?
    6·1 answer
  • please let me know if the answer is true or false. if false, please tell me what's false about it. the word that they are wonder
    7·1 answer
  • How many liters are equal to 8 megaliters (ML)?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!