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
Crazy boy [7]
3 years ago
7

How much heat is given off when 8 g of hydrogen reacts in: 2H₂ + O₂ → 2H₂O; ΔH = -115.60 kcal

Chemistry
1 answer:
Sedbober [7]3 years ago
4 0
ΔΗ= -115.6 kJ/mol
H2 has a Mr of 2, so as mol=mass/mr we can work out that there are 4 moles of H reacting

Therefore we multiply -115.6 by 4 = -462.4
You might be interested in
Monosaccharides and disaccharides are types of
Gnoma [55]

Answer:

Monosaccharides are simple carbohydrates and polysaccharides are two or more monosaccharides

8 0
2 years ago
What type of solid has the highest melting point?
dem82 [27]

Answer: B -Network solids

Ionic solids are held by positive and negative charged ions bonded by electrostatic forces. The electrostatic force is much stronger than dipole–dipole interactions, London dispersion forces, hydrogen bonding.

Molecular solids are held by dipole–dipole interactions, London dispersion forces, or hydrogen bonds. Benzene is an example of this. These inter-molecular force are much weaker than electrostatic force.

The metallic bonds are much weaker than electrostatic force. Similarly, in non-metallic solids the atoms are held by covalent bonds. These covalent bonds are weaker than the electrostatic force.

Thus we can conclude that electrostatic force is the strongest when compared to  dipole–dipole interactions, London dispersion forces, hydrogen bonding,covalent and metallic bonds. Thus ionic solids will have the highest melting point as more energy is required to break the ionic bonds as this is the strongest bond compared to the other bonds.

8 0
3 years ago
Read 2 more answers
HELP NOW BRAINLIST AND 15 POINTS!!!!!! PLEASE HELPPP​
ycow [4]

Answer:

sis why u doing school at night Lol.Save it for me tomorrow

3 0
3 years ago
Read 2 more answers
In a particular genetic cross, the probability of the offspring having a certain trait is Which percentage represents this proba
AnnyKZ [126]
I think it is 75% sorry if I am wrong but if I am correct can I get brainlest?
8 0
3 years ago
What type of bonding is occuring in the compound below?
rewona [7]

Answer:

(B). it's metallic bonding

8 0
3 years ago
Other questions:
  • How many atoms are there in 5.699 g of cobalt, Co? Express your answer with the appropriate significant figures and unit.
    12·1 answer
  • How many grams of zinc are needed to produce 25.0 g ZnCl2
    5·1 answer
  • Which statement about limiting factors is false? A. Limiting factors are conditions that affect an organism's chance of survival
    14·2 answers
  • During boiling, bubbles appear in the liquid water. In the boxes below represent the
    9·1 answer
  • What are three elements that have similar chemical properties to oxygen
    8·1 answer
  • From the following data for the first-order gas-phase isomerization of CH3NC at 215 C, calculate the first-order rate constant a
    8·1 answer
  • Consider a 180. g sample of water. The specific heat of water is 1.00 cal(g · °C) or 4.18 J/(g: °0).
    10·1 answer
  • Can someone pls help me on this
    13·1 answer
  • A substance with a lower specific heat capacity would:
    15·2 answers
  • I really need help! If I have 17 moles of gas at a temperature of 67°C, and a pressure of 5.34 atmospheres, what is the volume o
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!