CHEMISTRY MIDDLE SCHOOL

Definition of mitochondria

Answers

Answer 1
Answer: Mitochondria is a spherical or elongated organelle in the cytoplasm of nearly all eukaryotic cells, containing genetic material and many enzymes importantfor cell metabolism, including those responsible for the conversion of food to usable energy.
Answer 2
Answer: an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers

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When is the next lunar Eclipse and how do they happen?

Answers


°°The next Lunar Eclipse is on March 23, a Wednesday THIS YEAR - 65 days left!

°° A Lunar Eclipse happens when the moon passes directly behind the earth into its umbra, or, shadow. This can occur only when the sun, Earth and moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a Lunar Eclipse can occur only the night of a full moon. The type and length of an eclipse depends upon the Moon's location relative to its orbital nodes. Isn't that cool?

  ↑   ↑   ↑   Hope this helps! :D

Can show some work for 4x = -12

Answers

4x = -12

First, divide both sides by 4. / Your problem should look like: x = -(12)/(4)
Second, since 4 goes into 3 to get 12, simplify it by 3. / Your problem should look like: x = -3

Answer: x = -3
4x=-12
divide 4 on both sides 4x divided by 4 is x then u take 12 divided by 4 and it equals -3 so x= -3

What best explains the type of energy present in the vibrating atoms of a substance

Answers

The type of energy present in the vibrating atoms of a substance is a thermal energy and it is a kinetic type of energy. It is associated with movement within the crystal lattice of substance. ... Eventually, it can lead to motion of the atoms which is a form of kinetic energy.

Why does thunder usually occur during storms that have lightning

Answers

Opposite electrical charges form inside storm clouds separate, causing lightning to flash towards earth

What is the zero point 0,K on the kelvin scale called?

Answers

By international agreement, absolute zero is defined as precisely; 0 K on the Kelvin scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees Celsius on the Celsius scale.

A mixture of He, Ne, and N2 gases are a pressure of 1.348. If the pressures of He and Ne are 0.124 atm, what is the partial pressure of N2 in the mixture ?

Answers

Answer :  The partial pressure of N_2 in the mixture is, 1.224 atm

Solution :

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

P_T=p_(He)+p_(Ne)+p_(N_2)

where,

P_T = total partial pressure of He,Ne\text{ and }N_2 = 1.348 atm

P_(He) = partial pressure of helium

P_(Ne) = partial pressure of neon

P_(N_2) = partial pressure of nitrogen

As we are given that,

P_(He)+P_(Ne)=0.124atm

Now put all the given values in above expression, we get the partial pressure of the nitrogen gas in the mixture.

1.348atm=0.124atm+p_(N_2)

p_(N_2)=1.224atm

Therefore, the partial pressure of N_2 in the mixture is, 66 Kpa

The Best Answer: 1 - (.47+.23) = 0.30

If Ne has a mole fraction of 0.47 (or 47/100) and Ar is 0.23, then H2(or He) has a mole fraction of 0.30

This means the gas mixture is 30/100 H2(or He).

7.85 x 0.30 = 2.355 atm
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