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
Fudgin [204]
2 years ago
5

How do i know if a reaction is exo/endothermic?

Chemistry
1 answer:
oee [108]2 years ago
8 0

Answer:

You would if a reaction is exo/endothermic because an endothermic reaction soaks up heat. An exothermic reaction releases heat.

You might be interested in
Embryos have the genes of
REY [17]

Answer:

gggggggg

Explanation:

4 0
3 years ago
Read 2 more answers
(8.6 1029) 7.4 X1029)
andrew11 [14]

Answer:

65563.914234

Explanation:

8.61029 x 7.4 x 1029

63.716146 x 1029

multiply

= 65563.914234

3 0
3 years ago
Read 2 more answers
Write the balanced chemical equation for the following reaction. Phases are optional. Solid calcium chlorate decomposes to form
Tanya [424]

Answer:

  • Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)

Explanation:

1)<u> Word equation (given)</u>

  • <em>calcium chlorate (solid) → solid calcium chloride (solid)  + oxygen (gas)</em>

2) <u>Chemical formulae of the reactant and products</u>:

  • <em><u>Calcium chlorate</u></em><em>: </em>

The most common oxidation states of chlorine are -1, +1, +3, +5, +7.

The suffix ate in chlorate means that chlorine atom is with the third lowest oxidation state (counting only the positive states). So, this is +5.

The oxidation state of calcium is +2.

Hence, the chemical formula of calcium chlorate is Ca(ClO₃)₂

  • <u><em>Calcium chloride</em></u>

The suffix ide in chloride means that chlorine is with oxidation state -1. Again the oxidation state of calcium is +2.

Hence, the chemical formula of calcium chloride is CaCl₂

  • <u><em>Oxygen</em></u>

Oxygen gas is a diatomic molecule, so its chemical formula is O₂.

  • <u><em>Phases</em></u>

The symbols s and g (in parenthesis) indicate the solid and gas phases respectively.

3) <u>Chemical equation</u>:

  • Ca(ClO₃)₂ (s) → CaCl₂ (s) + O₂ (g)

That equation is not balanced becasue the number of O atoms in the reactant side and in the product side are different.

4)<u> Balanced chemical equation:</u>

Add a 3 as coefficient in front of O₂(g), in the product side to balance:

  • Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)

Verify that all the atoms are balanced:

Atom    Reactant side      Product side

Ca             1                           1

Cl              2                          2

O              3×2 = 6                2×3 = 6

Conclusion: the equation is balanced and the final answer is:

  • Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)
5 0
3 years ago
Which two energy sources were used the most in
Naily [24]

Answer:

The 1st and 2nd ones on the top

Explanation:

Hope this helps:)

4 0
2 years ago
I need help, plz help me with this problem
Svetlanka [38]

Answer:

It's b

Explanation:

I had the same exact question

5 0
2 years ago
Other questions:
  • What fact about elements would help explain why two elements would bond with the same element in the same proportion?
    8·1 answer
  • Which was briefly an anomaly in the fossil record of humans?
    12·1 answer
  • Starting with the unbalanced equation for the combustion of ethanol, C2H5OH(l)+O2(g)→CO2(g)+?H2O(l) what coefficient should be p
    5·1 answer
  • Write the electron configuration when Sulfur gains two electrons
    10·1 answer
  • Match the formula for the following compound: 
    7·2 answers
  • Muiltplying 2.5 x 10^10 by 3.5 x 10^-7
    6·1 answer
  • A cylinder at left with balls evenly spaced throughout the cylinder with an arrow leading to a cylinder at right with balls stac
    15·2 answers
  • As the water is heated, the volume of
    8·1 answer
  • How is our sense of vision like our sense of smell? ​
    15·1 answer
  • 6) A 14.5 g sample of sodium chloride reacts with excess fluorine gas according to
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!