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
77julia77 [94]
3 years ago
13

Which reactions are redox reactions? check all that apply. check all that apply. 4li(s)+o2(g)→2li2o(s) mg(s)+fe2+(aq)→mg2+(aq)+f

e(s) pb(no3)2(aq)+na2s?
Chemistry
1 answer:
Ymorist [56]3 years ago
4 0

The reaction s that are redox reactions are

4Li(s) +O2 (g)→ 2Li2O (s)\

Mg(s) +  Fe2+ (aq)→ Mg2+(aq) + Fe(s)

<h3>Explanation</h3>

A redox reaction involve both oxidation and reduction. During redox reaction there is change in oxidation states. For example in

4Li +O2 →2Li2O  Li is oxidized  while O  is  reduced

in  Mg +Fe2+ → Mg2+ +Fe   Mg is oxidized since it move from oxidation state 0 to 2+ while Fe2+ is reduced since it move from oxidation state of 2+ to 0

You might be interested in
A chemical reaction yields 3 moles of lithium hydroxide (LiOH). How many grams of
grin007 [14]

72g

Explanation:

Given parameters:

Number of moles of LiOH = 3moles

Unknown:

Mass of LiOH = ?

Solution:

A mole of  substance is a unit used to make quantitative measures in chemistry.

It is the amount of substance that contains the avogadro's number of particles.

The mole is related to mass using the expression below;

    Mass of a substance = number of moles x molar mass

Molar mass of LiOH = 7 + 16 + 1 = 24g/mol

 Mass of LiOH = 3 x 24 = 72g

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

8 0
3 years ago
Manganese sulfate forms a pale pink hydrate with the formula MnSO 4 ⋅ n H 2 O ( s ) . If this hydrate is heated to a high enough
Mama L [17]

Answer:

Value of n in MnSO₄.nH₂O is one.

Explanation:

The n represents the number of moles of water attached to the formula unit manganese sulfate. These moles (n) can be determined by taking the ratio of the moles of anhydrous salt and the moles of water. The moles of water can be determined by taking the difference of final and initial mass of the salt. This difference is equal to the mass of the water, mathematically it can be represented as,

Mass of H₂O = initial mass of the salt (g) - final mass of the salt (g)

Mass of H₂O = 16.260 g - 14.527 g

Mass of H₂O = 1.733 g

moles of H₂O = (1.733 g) ÷ (18.015 g/mole)

moles of H₂O =  0.0962

For the moles of anhydrous salt:

moles of MnSO₄ = mass of MnSO₄ ÷ molar mass of MnSO₄

moles of MnSO₄ = 14.5277 ÷ 151.001

moles of MnSO₄= 0.0962

Now for n:

n = moles of water ÷ moles of MnSO₄

n = 0.0962 ÷ 0.0962

n = 1

The above calculations show that one mole of H₂O is attached to the  one formula unit of MnSO₄

8 0
3 years ago
Most thermal conductors are made of which material?
Orlov [11]

Answer:

Most are made of copper.

Explanation:

8 0
3 years ago
Read 2 more answers
What does the pudding represent in the plum pudding model of the atom?
dolphi86 [110]

Answer:

the answer is  According to this model, the atom is a sphere of positive charge, and negatively charged electrons are embedded in it to balance the total positive charge. The electrons are like plums in a pudding.

Explanation:

4 0
3 years ago
Read 2 more answers
I am 14 and i am in 8th grade, and i really like this boy in my science class, and i really wanna ask him out but i don't know i
Helga [31]

Answer:

just go up to him and express ur feelings, there is no harm for that.

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • What are the reactants of cellular respiration? Check all that apply
    9·2 answers
  • An ion has 14 neutrons, 10 electrons, and a mass number of 27 what element
    13·1 answer
  • Which base is strong but never concentrated
    6·1 answer
  • True or false ( because water has a high _____ objects will float on it )
    7·2 answers
  • 3. The density of acetic anhydride is 1.08 g/mL. How many moles of acetic anhydride are used in this experiment
    5·1 answer
  • Balance this equation C6H12O6+O2 —-&gt; CO2+h2O
    8·1 answer
  • How does the activity series help determine the anode of a voltaic cell?
    8·2 answers
  • If there is sufficient water in the reaction system, how many grams of KOH can be produced from 22.2 g of K?
    11·1 answer
  • Which metalloid has three valence electrons? boron arsenic silicon lithium<br><br><br> HElp PLEase
    15·2 answers
  • Which sample would serve as a better buffer and therefore a better environment for aquatic life?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!