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ivann1987 [24]
2 years ago
5

How many molecules of o2 are produced from 82g of h2o? 2na2o2 +2h2o= o2 +4naoh

Chemistry
1 answer:
vovangra [49]2 years ago
6 0

Answer:
857.2947

Explanation:

You start with what you’re given 82g of H20 and multiply by 1 mole and the actual grams of h20 which is 18.0 then you do the mole. 1 mol of O2 and 2 mol of H2O times 6.02 x 10^23

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raketka [301]

Answer:

0.01 mole

Explanation:

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3 years ago
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the struct
Nadya [2.5K]
 <span>XY4Z2-->Square planar (Electron domain geometry: Octahedral) sp3d2 
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7 0
4 years ago
Read 2 more answers
1. 5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.092 cal
iren2701 [21]

 The amount  of energy  that  was  used to heat Cu  is 27.6 cal

 

<u><em>calculation</em></u>

Heat (Q) = M ( mass)  x c(specific heat capacity)  x ΔT( change in temperature)

where;

 Q=?

 M = 5.0 g

C=0.092 cal/g°C

ΔT = 80°c-20°c=60°C


Q is therefore = 5.0 g  x 0.092 cal / g°c x 60°c =27.6 cal

5 0
4 years ago
The first two ionization energies of nickel.
Radda [10]
The first two ionization energy of nickel are expressed as:
Ni(g) = Ni^+(g) + e^- Ni^+(g) = Ni^2+(g) + e^- 
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Hope this helps.
7 0
4 years ago
Assume the alveolar radii are 0.05 and 0.07 mm towards the end of exhalation. Knowing that air flows from high to low pressures,
xeze [42]

Answer:

0.286 mN/m^2

Explanation:

Using Laplace's law of surface tension:

P=\frac{2T}{r}

where:

P = pressure

T = surface tension

r = radius

In the longer alveoli with radius of  0.07 mm = 0.07*10^{-2}m; we have:

P =  \frac{2*25mN/m}{0.07*10^{-2}m}

P = 0.714 mN/m^2

In the smaller alveoli with radius 0.05 mm = 0.05 * 10^{-2} m; we have:

P = \frac{2*25mN/m}{0.05*10^-2m}

P = 1.00 mN/m^2

The pressure difference can now be calculate as follows:

Pressure difference = (1.00 - 0.714)mN/m^2

Pressure difference = 0.286 mN/m^2

5 0
3 years ago
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