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
Ivanshal [37]
3 years ago
10

When a reaction increases heat is that endothermic or exothermic, and is it a chemical or physical reaction?

Chemistry
1 answer:
Nostrana [21]3 years ago
5 0

Answer:

Exothermic, chemical reaction

Explanation:

Exothermic reaction gives off heat (temperature increases) as a product. It is also a chemical reaction that releases energy through light or heat.

You might be interested in
How many liters of 0.1107 M KCI contains 15.00 g of KCI (FW= 74.6 g/mol)
Mashcka [7]
Number of moles:

n = sample mass / molar mass

n = 15.00 / 74.6

n = 0.2010 moles of KCl

Therefore:

Molarity = moles / Volume

0.1107 = 0.2010 / V

V = 0.2010 / 0.1107

V = 1.815 L 


8 0
4 years ago
Read 2 more answers
The muscle in Lane's arm would best be described as -
Margarita [4]

Answer:

Basically a muscle is tissue but sometimes they are also called organ

So the answer should be D...a tissue

5 0
4 years ago
Balance the chemical equation below: CO2 + H2O + 2678 kJ-> C6H1206 + O2 a. How many moles of H20 are involved in this reactio
11Alexandr11 [23.1K]

Answer:

a) 6 mol H2O

b) this reaction is endothermic

c) when 1 mol of CO2 is used, in the reaction they occur 0.5025 KJ

Explanation:

balanced eq:

  • 6CO2 + 6H2O + 2678 KJ ↔ C6H12O6 + 6O2

                                         6 - C - 6

                                         18 - O - 18

                                          12 - H - 12

a) mol H2O = 6 mol.......from balanced equation.

b) ΔE = 2678 KJ....... this reaction absorbs heat ( ΔE is positive )

c)    1 gramo C6H12O6 ≅ 4 cal

  • Mw C6H12O6 = 180.156 g/mol

⇒ 1mol CO2 * ( mol C6H12O6 / 6mol CO2 ) =0.166 mol C6H12O6

⇒ 0.166mol C6H12O6 * ( 180.156 g C6H12O6 / mol ) = 30.026g C6H12O6

⇒30.026 gC6H12O6 * ( 4 cal / gC6H12O6 ) * ( Kcal / 1000 cal ) * (4184 J / Kcal ) * ( KJ / 1000 J ) = 0.5025 KJ C6H12O6.

8 0
3 years ago
If 3 newton's of force is pulling
Troyanec [42]
A. There is no movement
Hope this helps
5 0
3 years ago
Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are
Lubov Fominskaja [6]

Answer:

option A is correct  ( sodium, calcium and barium)

Explanation:

Given compounds:

Sodium chloride , calcium sulfide, barium oxide

We know that metals form positive ions. In order to solve the problem we must identify the metals from given compounds.

Na⁺Cl⁻

Ca²⁺S²⁻

Ba²⁺O²⁻

We can see that sodium, calcium and barium contain positive charges.

Thus option A is correct.

Because sodium have one valance electron. When it combine with chlorine sodium lose its one electron to complete the octet and chlorine accept it to complete its octet. Thus sodium form positive ion and chlorine form negative ion.

Similarly barium and calcium are present in group 2. Both have two valance electron. When they lose them cation are formed.

Other option are incorrect because,

Option B have sulfur and oxygen which are anion.

Option C have chlorine which is also anion

Option D have chlorine, sulfur and oxygen that are anions.

4 0
3 years ago
Other questions:
  • __________ refers to the total energy of a system.
    12·2 answers
  • Draw the Lewis structure of H2O. Include any nonbonding electron pairs. Draw the molecule by placing atoms on the grid and conne
    7·1 answer
  • 5. Identifying the limiting reagent: Given the reaction 2Cu + S → Cu2S, if you had 3 moles of both Cu and S, which would you run
    9·1 answer
  • How many ml is in a teaspoon??
    14·1 answer
  • The balanced equation for photosynthesis is shown below.
    12·1 answer
  • How many grams of H2 are needed to completely react within 50g of N2?
    9·1 answer
  • Convert 50 gr of water into moles and into molecules of H2O.
    10·1 answer
  • 15 POINTS AND BRAINLIEST
    14·1 answer
  • Please help asap chemistry homework
    10·2 answers
  • Which describes a characteristic of water that is responsible for frost wedging? (1 point) O Water expands as it freezes O Water
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!