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
Marina86 [1]
3 years ago
9

I have a exam please answer fast

Chemistry
1 answer:
VLD [36.1K]3 years ago
3 0

Answer:

C

\triangle \: H {}^{ \theta}  _{s} = lattice \: energy + hydration \: energy \\  =   + 2526 + ( - 2003 + (2 \times  - 340)) \\  + 2526 - 2683 \\  =  - 157 \: kjmol {}^{ - 1}

You might be interested in
Which of the following best describes Earth's tectonic plates?
Anna11 [10]
They move because of convection currents in the mantle
3 0
3 years ago
Propane gas reacts with oxygen according to this balanced equation: C subscript 3 H subscript 8 space (g )space plus space 5 spa
Misha Larkins [42]

Explanation:

The balanced chemical equation of the reaction is:

C_3H_8(g)+ 5O_2 (g)->3CO_2(g)+4H_2O(g)

From the balanced chemical equation,

1 mole of propane forms ------ 3 mol. of CO_2 gas.

The molar mass of propane is 44.1 g/mol.

One mole of any gas at STP occupies --- 22.4 L.

Hence, 44 g of propane forms (3x22.4 L=) 67.2 L of CO2 gas at STP.

Answer:

Thus, 67.2 L of CO2 is formed at STP.

4 0
2 years ago
Can someone help me please :)
Fudgin [204]
I think it’s the third option but I’m not entirely sure
3 0
3 years ago
Read 2 more answers
What happens as a result of the photoelectric effect? A.light is produced
Brrunno [24]

Answer:

photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.

3 0
1 year ago
Can you identify 2 characteristics of combustion reactions?
monitta
An element or compound will react with oxygen and will produce carbon dioxide, water, and sometimes carbon (if it is an incomplete combustion).
4 0
3 years ago
Other questions:
  • In which biome would you find the main types of plant life to be grasses and nonwoody plants
    13·1 answer
  • How does a atom form a new substance?
    10·2 answers
  • In the following reaction, what element is made?
    7·1 answer
  • Which substance can be decomposed by a chemical change?<br> (1) Co (3) Cr(2) CO (4) Cu
    10·1 answer
  • The normal boiling point of a substance is defined to be the temperature at which the liquid phase of the substance is in equili
    10·1 answer
  • A super conductor performs best at
    11·1 answer
  • If a sample of Fe2S3 contains 1.25x10ˣ15 iron atoms what is the mass in grams?
    9·1 answer
  • What is an important part of the endocrine system that acts as a chemical messenger?
    10·1 answer
  • ¿que fuerza de debera aplicar en un embolo pequeño de una prensa hidraulica de 12cm2 de area ,para levantar un cuerpo de 70000N
    13·1 answer
  • What is the molarity of a 0.250 L MgCl2 solution that contains 0.175 mol MgCl2?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!