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
Lisa [10]
3 years ago
9

(Thermodynamics)

Chemistry
1 answer:
Degger [83]3 years ago
4 0

Answer:

A) -270 kJ; B) +15 kJ; C) + 70 kJ

Step-by-step explanation:

ΔE = q + w

By convention, anything leaving the system is negative and anything entering the system is positive.

A) ΔE = -220 kJ -  50 kJ = -270 kJ

B) ΔE =  +65 kJ -   50 kJ =   +15 kJ

C) ΔE =  -50 kJ + 120 kJ =  +70 kJ

You might be interested in
Which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons?
frozen [14]

A stable arrangement of eight valence electrons : ³⁵Cl⁻¹

<h3>Further explanation</h3>

Chlorine is a halogen gas, located in group 17, p block

Chlorine has an atomic number of 17 and an atomic mass of 35

Electron configuration: [Ne] 3s²3p⁵

If we look at the electron configuration, then Cl will bind 1 more electron so that the configuration is stable like Argon (atomic number 18)

So by binding this one electron, chlorine forms negative ions (anions)

³⁵Cl⁻¹

B. Cl⁻² binds 2 electrons, exceeding the octet rule

C. Cl⁺¹, releases 1 electron, remains unstable

D. Cl, the neutral form of Cl, is still unstable with a 7-electron valence configuration

3 0
3 years ago
Liquid acetone is ______________.
MaRussiya [10]
A is the answer maybe
5 0
3 years ago
Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4.
Ymorist [56]

Answer:

plqojs then came back and her story about how the ocean had become toper for her own purposes and share the ocean and the mosquitoes and it that way in notebook life that they were never able of English orto make the ocean view the mosquitoes in the first place they would have to make it to.

5 0
3 years ago
Read 2 more answers
Different "substances" are forms of matter (having volume and taking up space) with different _______________ from each other. a
ExtremeBDS [4]

Answer:

properties

Explanation:

The properties of matter are the various ways in which matter behaves under certain circumstances.

Various substances have different volumes and shapes. These differences account for the various properties of matter.

3 0
3 years ago
Fill in the missing in information: (protons, electrons, atomic#, or
zloy xaker [14]

Answer:

sorry po Hindi ko po alam

3 0
2 years ago
Other questions:
  • The change from liquid to solid, or the reverse of melting, is calleda. condensation.
    9·1 answer
  • What is the percent by mass of potassium in KFe(CN)?
    7·1 answer
  • What is the formula for ammonium carbonite? How did you get it?
    10·2 answers
  • How many visible impact craters does the moon contain?
    11·1 answer
  • Wich are the disadvantages of skimming oil spills?
    8·1 answer
  • Why does the polyatomic anion OH need to gain
    6·1 answer
  • Using the VSEPR theory , what would the representation mean A central atom with 2 connected atoms atom with I lone pair of Jone
    5·1 answer
  • 71. The density of osmium (the densest metal) is 22.57 g/cm². If a
    14·1 answer
  • Write down the names, physical properties, and inertness of NOBLE GASES ( group no. 8)
    12·1 answer
  • What is the role of meteorites in the formation of life?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!