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
Alchen [17]
3 years ago
11

Object A at 40.°C and object B at 80.°C are placed in contact with each other. Which statement describes the heat flow between t

he objects?
(1) Heat flows from object A to object B.
(2) Heat flows from object B to object A.
(3) Heat flows in both directions between the objects.
(4) No heat flow occurs between the objects.
Chemistry
1 answer:
kvasek [131]3 years ago
3 0
(2) Heat flows from object B to object A.
You might be interested in
A mineral is made from what in the ground
IrinaK [193]
<span>Minerals are solid substances that occur naturally. They can be made from a single element (like gold or copper) or from a combination of elements.</span>
3 0
3 years ago
Given the following equation, N2O(g) + NO2(g) → 3 NO(g) ΔG°rxn = -23.0 kJ
Lelechka [254]

Answer:

ΔG°rxn = -69.0 kJ

Explanation:

Let's consider the following thermochemical equation.

N₂O(g) + NO₂(g) → 3 NO(g) ΔG°rxn = -23.0 kJ

Since ΔG°rxn < 0, this reaction is exergonic, that is, 23.0 kJ of energy are released. The Gibbs free energy is an extensive property, meaning that it depends on the amount of matter. Then, if we multiply the amount of matter by 3 (by multiplying the stoichiometric coefficients by 3), the ΔG°rxn will also be tripled.

3 N₂O(g) + 3 NO₂(g) → 9 NO(g) ΔG°rxn = -69.0 kJ

8 0
4 years ago
Suppose that, from measurements in a microscope, you determine that a certain layer of graphene covers an area of 1.50μm2. Conve
Alex73 [517]
The answer is 1.5*10^-12 square meters. For a detailed calculation, please refer to the attachment.
Download docx
7 0
4 years ago
Help with chemistry please<br><br>Which chemical reaction involves the most oxygen atoms?
Ratling [72]
H2O is A chemical reaction of the most oxygen atoms
3 0
3 years ago
The effectiveness of a chemical sanitizer can be limited by
Serjik [45]

Chemical sanitizer effectiveness, decreases with increase in pH . And most soap and detergent are alkaline in nature, that limits its effectiveness. So they should be rinsed off completely for proper effectiveness of santizer. So improper rinsing limits the effectiveness of a sanitizer.

So , the answer is improper rinsing after that still a detergent residue remains limits the effectiveness of sanitizer.

7 0
3 years ago
Other questions:
  • A solution was prepared by dissolving 40.0 g of kcl in 225 g of water. part a calculate the mass percent of kcl in the solution.
    5·2 answers
  • The substances sodium (Na), oxygen (O2), and sodium oxide (Na20) participate in this chemical reaction
    7·1 answer
  • Can someone help on this?
    11·1 answer
  • Please help!!!!!!!!! ASAP!!!
    10·1 answer
  • Read the speedometer and report the speed to the proper
    8·1 answer
  • Of the molecules below, only ________ is polar.a. SiCl4 b. CH4 c. CCl4 d. SeF4
    5·1 answer
  • La valencia que utiliza el hidrógeno al formar un hidruro metálico es
    15·1 answer
  • What is the name for the compound formed between nitrogen and magnesium. (show your work)
    5·1 answer
  • Aluminum metal reacts with aqueous nickel(II) sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. In this r
    13·1 answer
  • How many atoms are in 6.3 mol Zn
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!