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
kkurt [141]
3 years ago
13

Help please 12 point

Chemistry
1 answer:
Artyom0805 [142]3 years ago
7 0
An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. im sorry i only could do one! but hope this helped!
You might be interested in
How many joules are required to melt 100 grams of water? The heat of
vova2212 [387]
Answer- 33.4 kJ


Explanation-

100 g H2O x (1mol/18g) = 5.5 mol

q=(5.5 mol)(6.01 KJ/mol)= 33.4 kJ
4 0
3 years ago
Why aren't hydrogen fuel cells currently available to the public​
Romashka-Z-Leto [24]

Answer:

they require more testing in real-word conditions

Explanation:

One of the biggest reasons for this very slow uptake of hydrogen vehicles is the existing infrastructure. ... The sceptics' first argument against hydrogen vehicles is that they're less efficient than EVs are. Because hydrogen doesn't occur naturally, it has to be extracted, then compressed in fuel tanks.

8 0
3 years ago
A 0.8838-g sample of an ionic compound containing bromide ions and an unknown metal cation is dissolved in water and treated wit
Alex17521 [72]
Wow this is really hard dude
4 0
3 years ago
Read 2 more answers
What is the ph value of hcl
mina [271]
This is a strong acid but the actual value of the pH will depend on its strength. 
Acids have a pH of less than 7.
5 0
4 years ago
Read 2 more answers
How does a buffer regulate pH?
Alex_Xolod [135]
C is the correct answer.a buffer reacts with the added acid or base which can produce H+ or hydroxide ion,or a kind of removing H+ or hydroxide added to solution.remember that buffers don't prevent additional acid or base from reacting,they react with the additional themselves.the A and D are completely wrong.
6 0
3 years ago
Other questions:
  • What is gravity?<br><br> In your own words?
    12·1 answer
  • In the following overall chemical reaction, aluminum displaces chromium from chromium(III) oxide and forms aluminum oxide.
    13·1 answer
  • I am HORRIBLE at chemistry, Can somebody help me out with this question please.
    5·2 answers
  • Write a balanced equation for the single-displacement reaction of Al(s) with CuSO4(aq). Include states of matter in your answer.
    7·1 answer
  • Hey, I need help with this but, can someone simplify?
    12·1 answer
  • What is this an example of ?
    7·1 answer
  • You measured out 25.00 mL of Coke. If the density of Coke is 1.042 g/mL, what is the mass?
    11·1 answer
  • Which element forms a chloride of the type XCl2
    15·1 answer
  • Elabore el balance de la ecuación por oxido reducción enumerando cada paso
    9·1 answer
  • 8. What is the molecular formula of a compound with the empirical formula CCIN and a molar mass of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!