3 years ago

Which of the following are advantages of the SI system?

Chemistry

2 answers:

Leya [2.2K]3 years ago

7 0

A b c ar e the correect ones

lions [1.4K]3 years ago

3 0

The correct answer is A, B and C

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What two positions would the moon be when we have the lowest tidal range?

Shkiper50 [21]

Answer:

Quarter and half moons

Explanation:

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3 years ago

Los hongos son bacterias?

malfutka [58]

Los hongos si son bacterias

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The energy gap between the valence band and the conduction band in the widely-used semiconductor gallium arsenide (GaAs) is Δ =

stira [4]

Answer:

$n_e = 8.139 *10^6$

Explanation:

Given that;

The energy gap between the valence band and the conduction band in the widely-used semiconductor gallium arsenide (GaAs) is Δ = 1.424 eV.

So; that implies that:

$\delta \ E = 1.424 \ eV$

Suppose that we consider a small piece of GaAs with 1020 available electrons, -- This is taking about the numbers of electrons used which is :

$n_i = 10^{20} \ electrons$

Temperature is given as:

$T = 274.15 \ K$

Number of electrons can be calculated by using the formula;

$n_e = n_i*e^-^{\frac{\delta E }{2 K_B*T}}$

$n_e = 10^{20}*e^-^{\frac{1.424}{2*8.617*10^{-5}*274.15}}$

$n_e = 8.139 *10^6$

8 0

3 years ago

Calculate the number of moles in each of the following compounds. 180 g of Zn

iVinArrow [24]

You can do this by dividing by the molar mass of Zn:

4 0

3 years ago

Consider the reaction. At equilibrium, the concentrations of the different species are as follows. [NH3] = 0.105 M [N2] = 1.1 M

Zina [86]

Hey there!:

The reaction is as follows:

N2(g)+ 3 H2(g) ⇌ 2 NH3(g)

At equilibrium, the concentrations of the different species are as follows.:

[NH3] = 0.105 M

[N2] = 1.1 M

[H2] = 1.50 M

The equilibrium constant for the reaction is given as follows:

Keq = [NH3]² / [N2] [H2]³

Keq = (0.105)² / [1.1] [1.50]³

Keq = 0.00296 or 0.0030

The equilibrium constant for the reaction at this temperature is 0.0030.

Hope that helps!

4 0

3 years ago