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Leya [2.2K]
3 years ago
5

3. What is meiosis?

Chemistry
1 answer:
ikadub [295]3 years ago
8 0

Answer:

a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

Explanation:

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Please help!!!
Alekssandra [29.7K]
True!! they can be measured without changing chemical identity.
8 0
3 years ago
What is the energy of a photon with wavelength of 670.8?
Sliva [168]
<span>The velocity of a wave is calculated by v = λf. From this equation we can take the frequency f = v / λ and substitute in the energy equation to find a new equation for the calculation of the energy from the wavelength: E = hc / λ</span>


To calculate the photon energy, in eV (Electrovolt), when we have the value of the wavelength λ (necessarily given in Å - angstrom), we use an alternative equation given by:
E =  \frac{12400}{\lambda}

Data: 670.8 Å

Solving:
E = \frac{12400}{\lambda}
E = \frac{12400}{670.8}
\boxed{E \approx 18,4eV}
8 0
3 years ago
16 mol of oxygen were react with excess hydrogen gas, how many moles of water would be produced
german
2H₂  +  O₂   →   2H₂O

mole ratio of O₂  :  H₂O     is     1  :  2

∴  if moles of O₂ = 16 mol

then moles of H₂O = (16 mol ×  2)

                               =  32 mol
7 0
3 years ago
Read 2 more answers
A 3.96x10^-24 M solution of compound A exhibited an absorbance of 0.624 at 238 nm in a 1.000-cm cuvet; a blank solution containi
viktelen [127]

Actual question from source:-

A 3.96x10-4 M solution of compound A exhibited an absorbance of 0.624 at 238 nm in a 1.000 cm cuvette.  A blank had an absorbance of 0.029.  The absorbance of an unknown solution of compound A was 0.375.  Find the concentration of A in the unknown.

Answer:

Molar absorptivity of compound A = 1502.53\ {Ms}^{-1}

Explanation:

According to the Lambert's Beer law:-

A=\epsilon l c

Where, A is the absorbance

 l is the path length  

\epsilon is the molar absorptivity

c is the concentration.  

Given that:-

c = 3.96\times 10^{-4}\ M

Path length = 1.000 cm

Absorbance observed = 0.624

Absorbance blank = 0.029

A = 0.624 - 0.029 = 0.595

So, applying the values in the Lambert Beer's law as shown below:-

0.595=\epsilon\times 1.000\ cm\times 3.96\times 10^{-4}\ M

\epsilon=\frac{0.595}{3.96\times 10^{-4}}\ {Ms}^{-1}=1502.53\ {Ms}^{-1}

<u>Molar absorptivity of compound A = 1502.53\ {Ms}^{-1}</u>

4 0
3 years ago
During an effusion experiment, a certain number of moles of an unknown gas passed through a tiny hole in 50 seconds. Under the s
mafiozo [28]
50/35 = √x/ √31.9988 g
50 x (√31.9988/ 35) = √x

√x = 8.081...

x= 65.30...

x= 70 g/ mol


3 0
3 years ago
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