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
Mrrafil [7]
3 years ago
12

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

Chemistry
1 answer:
goblinko [34]3 years ago
3 0

Answer:

Explanation: in exothermic reaction heat is released out

In endothermic reaction heat is absorbed

You might be interested in
Which of the following could be the name of the substance in box ‘c` choose only one box:
pentagon [3]
I would say carbon monoxide
Firstly because the image shows two different atoms bonded so it cannot be nitrogen or krypton
Secondly sulphur dioxide has 3 atoms bonded (two oxygens and a sulphur atom) so it can’t be that
Finally it can’t be hydrogen chloride because chloride is significantly larger than hydrogen
Thus it must be carbon monoxide as carbon and oxygen are bonded (CO) and are both relatively similar in size
7 0
3 years ago
Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react
laiz [17]

1) List the reactants: sodium bicarbonate (NaHCO₃) and citric acid (H₃C₆H₅O₇).

Reactants undergo change during a chemical reaction.

2) List the products: water (H₂O), carbon dioxide (CO₂) and sodium citrate (Na₃C₆H₅O₇).

Products are the substances formed from chemical reactions.

3) The balanced chemical equation:

3NaHCO₃ + H₃C₆H₅O₇ → 3H₂O + 3CO₂ + Na₃C₆H₅O₇.

6 0
4 years ago
What is the mass of 7.2 moles of titanium to the nearest tenth?
Thepotemich [5.8K]

Answer:

7.2 moles of titanium weigh 344.7 grams.

Explanation:

Molar mass of titanium = 47.88 g

1 \: mole \: of \: titanium = 47.88 \: grams \\ 7.2 \: moles \: of \: titanium = g

solve for g

g = ( \frac{7.2 \times 47.88}{1} ) \\ g = 344.7 \: grams

8 0
3 years ago
Read 2 more answers
P3F4 is a(n) _________.
borishaifa [10]

Answer:

C. covalent compound

Explanation:

Both phosphorus (P) and fluorine (F) are nonmetals, so we know it's a covalent bond. See my other answers to your questions to further understand the types of bonds.

3 0
3 years ago
Read 2 more answers
A blue whale has a length of 28,578 millimeters. What is the length of a blue whale in kilometers? Show your work below by writi
kotegsom [21]

Answer:

Length of whale in km = 0.028578 km

Explanation:

Given:

Length of whale = 28,578 millimeter

Find:

Length of whale in km

Computation:

We know that;

1 km = 1,000,000 mm

So,

Length of whale in km = 28,578 / 1,000,000

Length of whale in km = 0.028578 km

6 0
3 years ago
Other questions:
  • Suppose that when you wake up in the morning, you are very hungry. You go to the refrigerator and remove an egg. On the way to t
    13·2 answers
  • The density of copper is 9.0g/cm3 and the mass of a copper coin is 0.31g. Calculate the volume of the coin.
    11·1 answer
  • What two factors affect the boiling point of water?
    11·1 answer
  • The true absorbance for a 1.0 x 10 −5 M solution is 0.7526. If the percentage stray light for a spectrophotometer is 0.56%, calc
    10·1 answer
  • Which mineral resource is used to make baby powder?
    9·2 answers
  • ANSWER QUICK AND I MARK BRAINLEST!!!!!!
    9·1 answer
  • Which of these 2A elements has the largest atomic radius?
    11·1 answer
  • Some people say that only gay and bisexual men are likely to be infected with hub true false
    12·2 answers
  • How many moles are present in 2.95 x1024 molecules of water (H20)
    12·1 answer
  • Structures in the human body work together to perform specific functions. The
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!