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Viktor [21]
3 years ago
13

A regular solid measures 13.4 cm x 11.0 cm x 2.2cm. Calculate the volume of the solid.

Chemistry
1 answer:
AlekseyPX3 years ago
7 0

Answer:

324.28 cm cubed

Explanation:

13.4 cm x 11.0cm x 2.2cm = 324.28 cm cubed

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Find the pH of NaOH with a concentration of 0.0600 M.
Citrus2011 [14]

Answer:

12.78

Explanation:

pOH= -log(0.0600) = 1.22184875

pH= 14-1.22184875 = 12.78

5 0
3 years ago
A student has to design a titration experiment to determine the concentration of an unknown acid. Answer questions a–f.
Paraphin [41]
29101929228/92992929292
3 0
3 years ago
Consider the following half-reactions and their standard reduction potential values to answer the following questions.
Ganezh [65]

Answer:

Br2 (l) + 2e- ---------> 2Br- (aq) E° = 1.08 V cathode

Cu2+ (aq) + e- --------->Cu+ (aq) E° = 0.15 V anode

Explanation:

We have to first state the fact that the reaction having the most positive reduction potential occurs at the cathode in any spontaneous electrochemical cell. The half reaction with the less positive electrode potential usually occurs at the anode.

The overall reaction equation is;

2Cu2+ (aq) + Br2 (l) ----->2Cu+ (aq) + 2Br- (aq)

E°cell= E°cathode - E°anode

E°cathode= 1.08 V

E°anode= 0.15V

E°cell = 1.08-0.15 = 0.93 V

But

∆G°= -nFE°cell

n= 2, F=96500C, E°cell= 0.93V

∆G° = -(2× 96500× 0.93)

∆G= -179490 J

But;

∆G = -RTlnK

R=8.314 JK-1

T= 25+273= 298K

Kc= the unknown

∆G° = -179490 J

Substituting values and making lnK the subject of the formula

lnK= ∆G/-RT

lnK= -( -179490/8.314 × 298)

lnK= 72.45

K= e^72.45

K= 2.91×10^31

4 0
3 years ago
Which of the substances below would dissociate into ions when dissolved in water? Select all that apply.
dusya [7]

Answer:

B. NaBr

D. KOH

Explanation:

Below is the solubility rules given for you knowledge.

Salts of

  • Group 1 elements are soluble(Li^+, Na^+, K^+,Cs^+, Rb^+)
  • Ammonium ion is soluble (NH4^+)
  • The nitrate are generally soluble( NO3^-)
  • of Cl- , Br- , and I- are soluble, except Ag+ , Pb+2, and (Hg2)+2
  • most sulfate are soluble, except Ba+2, Ca+2,Pb+2, Ag+, Sr+2.
  • most hydroxide salts are only slightly soluble, except NH+4, Li+, Na+, K+
  • Most carbonates are insoluble (CO3 2-) Except group 1 and NH+4
  • most phosphate are insoluble except group 1 and NH+4  

so using the rules above

NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.

7 0
3 years ago
If you observe the a full moon on January 12th on what date would you observe the next new moon
crimeas [40]

Answer:

February 12th, the reason being, studies have shown a full moon happens about every 29.5 days, so round it up to 30, which would be a month later than January 12th! A month later from January 12th would be February 12th!

Explanation:

Hope this helps God bless!

5 0
2 years ago
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