If lone pairs of electrons, electrons not bonded to other atoms, are located in the molecule, this will change the molecular geometry, not the electron geometry. If all the electron groups are bonded, with no lone pairs, then the electron geometry and molecular geometry are the same.

5 0

2 years ago

Can someone please give me a testable question for Oxygen. I cant think of one for the life of me.

alexandr1967 [171]

Answer:

Explanation:

You could test effect of oxygen levels on growth of a regular houseplant. You could make the control to be plant grown under regular atmospheric Oxygen level. And for changing variables you could have one plant grow at low oxygen level compared to atmospheric oxygen and another plant to grow at higher levels of oxygen when compared to atmospheric oxygen.

3 0

2 years ago

Ordinary glasses are worn in front of the eye and usually 2.00 cm in front of the eyeball. A certain person can see distant obje

Lelu [443]

Answer:

The focal length is 15.549 cm

The power of the lens is 0.0643 D

Solution:

As per the question:

The near point is 50.0 cm

Distance of the glasses from the eyeball, d = 2.00 cm

The near point of a normal human eye is 25 cm

Now,

The image distance, v' = 50.0 - 2.00 = 48.0 cm

The object distance, u' = 25.0 - 2.00 = 23.0 cm

Now, using the Lens maker formula to calculate the focal length:

$\frac{1}{f} = \frac{1}{u'} + \frac{1}{v'}$

$\frac{1}{f} = \frac{1}{48.0} + \frac{1}{23.0} = 0.0643$

f = 15.549 cm

Now, the power of the lens in diopters is given by:

$P = \frac{1}{f} = \frac{1}{15.549} = 0.0643 D$

7 0

3 years ago