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
maw [93]
3 years ago
13

คำถามตามในรูปครับ หาค่า half-equation EMF...

Chemistry
2 answers:
Anvisha [2.4K]3 years ago
8 0
I wanna help answer the question but i don’t understand what it says
Lesechka [4]3 years ago
4 0
It’s Thai right? I want to help but don’t know how to answer this question.
You might be interested in
A chemist prepares a solution of barium acetate by measuring out of barium acetate into a volumetric flask and filling the flask
leonid [27]

The given question is incomplete. The complete question is :

A chemist prepares a solution of barium acetate by measuring out 32 g of barium acetate into a 350 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's barium acetate solution. Round your answer to significant digits.

Answer:  The concentration of barium acetate solution is 0.375 mol/L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml

moles of Ba(CH_3COO)_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{32g}{255g/mol}=0.125mol

Now put all the given values in the formula of molality, we get

Molarity=\frac{0.125\times 1000}{350ml}

Molarity=0.357M

Therefore, the concentration of solution is 0.375 mol/L

8 0
3 years ago
How many grams of sodium oxide can be synthesized from 17.4 g of sodium? assume that more than enough oxygen is present. the bal
Tatiana [17]
Equation is as follow,

<span>                          4 Na (s)  +  O</span>₂ <span>(g)    →    2Na</span>₂<span>O (s)

According to equation,

      91.92 g (4 moles) of Na produces  =  123.92 g (2 moles) of Na</span>₂O
So,
                    17.4 g of Na will produce  =  X g of Na₂O

Solving for X,
                                   X  =  (17.4 g × 123.92 g) ÷ 91.92 g

                                   X  =  23.45 g of Na₂O
7 0
3 years ago
Filtration can separate a mixture of fine sand and coarse gravel. The holes in the filter should be large enough to allow ______
Charra [1.4K]

The sand to pass through, but not the gravel. Hope this helps!

5 0
3 years ago
Read 2 more answers
Which of the following statements describes
kozerog [31]

Answer:

Energy is released as heat during the reaction.

5 0
3 years ago
What is the wave speed if the wave length is 8 and the frequency is 20
PilotLPTM [1.2K]

Answer:

160m/s

Explanation:

To find V Use the following formula V= F*W

V= Velocity F= Frequency W= Wavelength

V=20*8

=160m/s

4 0
3 years ago
Other questions:
  • Al2(SO4)3(s) + H2O(l) ---- Al2O3(s) + H2SO4 (aq) calculate enthalpy formation for this reaction. Balance the reaction. Calculate
    15·1 answer
  • How did the change of stress (adding or removing reactants or products) cause a shift in the equilibrium system of your solution
    10·1 answer
  • Which of the following is not a factor that affects thermal energy of a substance?
    13·1 answer
  • What happens to Earth’s temperature as cloud cover increases? A. The temperature increases. B. The temperature decreases. C. The
    10·2 answers
  • NEED HELP ASAP!!!
    8·1 answer
  • Balance the equations
    6·1 answer
  • Which atom in each pair that has the largest atomic radius.
    14·1 answer
  • A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.22 atm
    11·1 answer
  • How many eggs are in 1 mole of eggs?
    6·1 answer
  • During a reaction, the enthalpy of formation of an intermediate is 34 kJ/mol. During the reaction, 4 moles of the intermediate a
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!