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
Leto [7]
3 years ago
15

The first law of thermodynamics states that ΔE=Q-W. How is this also a statement of the principle of conservation of energy?

Chemistry
2 answers:
Korolek [52]3 years ago
6 0

Answer:

c

Explanation:

yaroslaw [1]3 years ago
4 0
Hello I took this test just now and got 100% your correct answer would be C. Hope this helps.
You might be interested in
Atoms of which element react spontaneously with mg2+ (aq)?
ehidna [41]
The complete answer contains the answer choices.


This is the complete question:


Atoms of which element react spontaneously with Mg2+(aq)? (1)chromium
(2)barium
(3)iron
(4)zinc


Answer: option 2. barium.


Explanation.


1) Mg ²⁺ (aq) is the aquous cation of the metal Mg.


2) Only a metal more reactive than Mg will be able to exchange with it the oxidation states.


3) Mg is an earth alkalyne metal (group 2 of the periodic table). The metals from this group are more reactive than the metals in the groups to its right: 3, 4, 5, 6, 7, ... Only the alkalyne metals (those in group 1) are more reactive than the earth alkalyne metals.


4) Of the list, barium is the only alkalyne metal, so it is more reactive than Mg and will be able to deliver 2 electrons to transform the cations Mg²⁺ into Mg while the very Ba will become Ba²⁺.


5) Chromium, iron and zinc are transition metals, so less metallic (reactive) than Mg.
3 0
3 years ago
Which of the following accurately describes a charactic of fungi
Black_prince [1.1K]
What are your options?
3 0
2 years ago
Choose the correct option for the redox reaction below : 8H+(aq) + MnO4-(aq) + 5Fe2+(aq) → Mn2+(aq) + 5Fe3+(aq) 4H2O(l) H+ (oxid
hodyreva [135]

Explanation:

8H+(aq) + MnO4-(aq) + 5Fe2+(aq) → Mn2+(aq) + 5Fe3+(aq) + 4H2O(l)

To determine if a substance was reduced or oxidized, the oxidation number at the reactant and product side is compared.

When oxidation occurs, an element loses electrons and its oxidation number increases (becomes more positive). When reduction occurs, an element gains electrons and its oxidation number decreases or is reduced (becomes more negative).

H+ (oxidized or reduced) Answer 1 Choose...

There is an increase in oxidation number from 0 to 1. This means H+ was oxidized.

MnO4- (oxidizing or reducing agent) Answer 2 Choose...

In chemistry, an oxidizing agent is a substance that has the ability to oxidize other substances — in other words to accept their electrons

MnO4- is a strong oxidizing agent.

Fe2+ (oxidizing or reducing agent) Answer 3 Choose...

A reducing agent means it will itself get oxidized. In  this reaction, Fe2+ is the reducing agent.

Fe2+ (oxidized or reduced) Answer 4 Choose...

Oxidized

O in MnO4- (oxidized or reduced) Answer 5 Choose...

There is no change in oxidation number of , so it was neither reduced nor was it oxidized.

Mn in MnO4- (oxidized or reduced) Answer 6 Choose...

There is a decreaase in oxidation number from +7 to +2. This means reduction.

6 0
3 years ago
A habit is: <br>pls help me ty​
kherson [118]
What class is this? (Subject)
4 0
2 years ago
Read 2 more answers
We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculat
BlackZzzverrR [31]
<span>44.0 kJ is the answer</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Describe the light spectrum of a star
    15·1 answer
  • Ammonium nitrate decomposes to dinitrogen monoxide and water. If given 45.7 grams of ammonium
    12·1 answer
  • Although HCl and H2SO4 have very different properties as pure substances, their aqueous solutions possess many common properties
    14·1 answer
  • Please help with this​
    11·1 answer
  • Helpppp me pleaseeee asaaap
    7·1 answer
  • I need help please???
    14·1 answer
  • С14H30= 3C2H4 + ? <br><br>Please help I'm really bad with science lol​
    14·1 answer
  • When you throw a rock, you are ________ energy.
    7·1 answer
  • Iron has a specific heat of 0.448J/g°C. Gold has a specific heat of 0.128 J/g°C. If 100 Joules of energy was added to equal amou
    13·1 answer
  • In an alkane the mass ratio between hydrogen and carbon is 7/36. What is the formula of alkane?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!