Alcohol metabolism takes place in the O small intestine stomach O heart Oliver

Why must all deadlier pesticides be developed?

alex41 [277]

Due to the other pesticides have outgrown their strength on today’s insects. All must be accompanied by mass paperwork for safety.

8 0

3 years ago

Use MO diagrams to place B2+, B2, and B2- in order of (a) decreasing bond energy; (b) decreasing bond length.

shepuryov [24]

We use the MO diagram for a homonuclear diatomic species (since C and N are neighbours, we treat them as the "same").

The first two electrons contribute to bonding. The next two are anti-bonding.

The next six contribute to bonding, and the following six are anti-bonding.

So, if we start with CN+, which has 4+5-1 (8) valence electrons, we note that the first two electrons contribute to bonding, while the next two cancel this out; the next four contribute to bonding, so the bond order is 4/2 = 2.

If we add one more electron to get CN, there are now 5 bonding electrons, giving bond order 5/2=2.5.

Adding one more to give CN- would give the bond order 6/2 = 3. (If we added more electrons, each one would lower the bond order.)

Given a series of molecules with identical skeletal structures, the one with the highest bond order has the highest bond energy:

CN+ < CN < CN-

Lewis structures will verify that CN- has a triple bond, but they do not work particularly well for CN+ and CN.

learn more about bond orders at

brainly.com/question/9713842

#SPJ1

3 0

1 year ago

A material has an ASTM grain size number of 7. Determine the magnification, if the number of grains per square inch observed is:

Luden [163]

Answer:

A) M = 100X

B) M = 36X

C) M = 178.88X

Explanation:

Given data:

ASTM grain size number 7

a) total grain per inch^2 - 64 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have

$64 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 100 X

B) total grain per inch^2 = 500 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have $500 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 36 X

C) Total grain per inch^2 = 20 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have $20 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 178.88 X

8 0

2 years ago

Root nodules are associations between bacteria and plant roots responsible for

max2010maxim [7]

Answer: Root nodules are associations between bacteria and plant roots responsible for nitrogen fixation.

Explanation:

As nitrogen present in atmosphere cannot be used by plants directly.
Nitrogen present in atmosphere is converted into nitrogen compounds by bacteria which is present in root nodules of a plant.
These compounds of nitrogen are then used by plants for various functions.

8 0

3 years ago

The net force on a vehicle that is accelerating at a rate of 1.2 m/s² is 1500 newtons. What is the mass

kotegsom [21]

Answer:

1250kg

Explanation:

Given parameters:

Acceleration = 1.2m/s²

Force = 1500N

Unknown:

Mass on the vehicle = ?

Solution:

According to newton's second law of motion:

Force = mass x acceleration

Since mass is the unknown, insert the parameters and solve;

1500 = mass x 1.2

mass = $\frac{1500}{1.2}$ = 1250kg

5 0

2 years ago