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
allochka39001 [22]
3 years ago
12

Can someone explain these?​

Chemistry
1 answer:
elena-s [515]3 years ago
6 0

Answer:

what??

Explanation?/

You might be interested in
9. How many significant figures are there in the number 0.0001372?
olga_2 [115]
D because 0 is always ignorant in significant figures. hope that helps:)
4 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP
Inessa05 [86]

The enthalpy change for the reaction 2K + S + K2S using the following thermochemical reactions is mathematically given as

dn=70.7kg

<h3>What is the enthalpy change for the reaction?</h3>

Generally, the equation for the  Chemical reaction is mathematically given as

2k+s----->K2S

Therefore

KS+K----->K2S

Therefore

dn=dn1+dn2

dn=32.5+38.2

dn=70.7kg

In conclusion,  the enthalpy change is

dn=70.7kg

Read more about Chemical reaction

brainly.com/question/16416932

#SPJ1

4 0
2 years ago
What mass of cu(s)cu(s) is electroplated by running 14. 5 aa of current through a cu2 (aq)cu2 (aq) solution for 4. 00 hh?
galina1969 [7]

The mass of Copper electroplated is 68.76 g

<h3>What is electroplating?</h3>

The process of plating a metal onto another is known as electroplating.

It is often used to prevent corrosion of metal or for the decorative purposes

In this process, electric current is passed through an aqueous solution containing dissolved cations.

The dissolved cations are reduced developing a thin metal coating on the electrode.

At cathode,

Cu^{2+}(aq) + 2e^-\rightarrow      Cu(s)

Current, I = 14.5 A

Time, t = 4 hrs = 4×60×60 = 14400 sec

Charge, q = It = 14.5×14400= 208800 C

Copper metal deposited by 2×96487 C = 63.55 g

Copper metal deposited by 208800 C = \frac{63.55 \times208800}{2\times96487}

                                                         = 68.76g

Hence, The mass of Copper electroplated is 68.76 g

Learn more about electroplating:

brainly.com/question/22104403

#SPJ4

4 0
1 year ago
Read 2 more answers
Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ cur
zmey [24]

I hate virtual school

7 0
3 years ago
How much heat is absorbed by 15.5 g of water when its temperature is increased from 20.0°C to 50.0°C? The specific heat of water
Zigmanuir [339]
Q = m . C . Δ T
q : Heat absorbed
m : mass of the sample
C : The specific heat of the substance.
Δ T : The change in temperature (Final T - initial T)
So: 
q = 15.5 x 4.18 x (50 - 25) = 1619.75 J 
5 0
3 years ago
Read 2 more answers
Other questions:
  • What's your favorite show mines riverdale and glee also who's your crush teehee​
    8·2 answers
  • The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for t
    8·2 answers
  • Which statement best explains the results of the experiment?
    7·2 answers
  • What would you observe when zinc is added to solutions of iron II sulphate? write the chemical reaction that takes place.​
    15·1 answer
  • What do two different neutral isotopes of the same element have in common?
    6·1 answer
  • How many significant figures are in 675000 m <br> 6<br> 4<br> 3<br> 5
    5·1 answer
  • Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He. W
    5·1 answer
  • 4. Think of the solids and liquids that you encounter every day. In what ways are solids and liquids similar? In what ways are t
    8·1 answer
  • If a gas has a proportionality constant of 4.32 x 10-4 mol at room temperature for a particular solvent, what will the
    9·1 answer
  • quizlet a basement is successfully sealed so that more radon may not enter the space, but 5.7×107 radon atoms are already trappe
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!