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2 years ago

Why is u-235 a good isotope of uranium for creating chain reactions?

1 answer:

5 0

under specific conditions it can promptly be taken apart easily, yielding a great deal of energy . It is subsequently said to be 'fissile' and we utilize the articulation 'atomic splitting'. In the interim, similar to every single radioactive isotope, they rot.

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Which chemical equation best represents the process of photosynthesis?

Over [174]

Answer:

6CO2 + 6H20 ----> C6H12O6 + 6O2

Explanation:

(Carbon Dioxide) + (Water) ------> (Glucose) + (Oxygen)

6 0

2 years ago

Read 2 more answers

A sample of 4.0 L of nitrogen, at 1.2 atmospheres, is transferred to a 12 L container.

Zielflug [23.3K]

Answer:

The pressure will be 0.4 atm.

Explanation:

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P*V= k

If you initially have the gas at a volume V1 and press P1, when the conditions change to a volume V2 and pressure P2, the following is satisfied:

P1*V1= P2*V2

In this case:

P1= 1.2 atm
V1= 4 L
P2= ?
V2= 12 L

Replacing:

1.2 atm* 4 L= P2* 12 L

Solving:

$P2=\frac{1.2 atm*4 L}{12 L}$

P2= 0.4 atm

The pressure will be 0.4 atm.

7 0

2 years ago

How many carbon atoms are in 7.05 moles of pyridine

NemiM [27]

First, it is best to know the chemical formula of pyridine which is C5H5N. To determine the number of carbon atoms present in pyridine, multiply 7.05 mol C5H5N with 5 mol C/ 1 mol C5H5N which then results to 35.35 mol of carbon. Then, multiply the answer to Avogadro's number which is 6.022x10^23 atoms. It is then calculated that the number of carbon atoms in 7.05 moles of pyridine is 2.12x10^25 atoms.

5 0

2 years ago

Read 2 more answers

Which of the following elements can form diatomic molecules held together by triple covalent bonds?

Art [367]

Nitrogen can form a diatomic molecule held together by triple bonds.

6 0

2 years ago

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An obese man was discovered in his air-conditioned hotel room sitting in a chair in front of the television. The air conditioner

Leno4ka [110]

Answer:

It has been approximately 6 hours after death.

Explanation:

This is because between 2-6 hours after death, the body starts becoming stiff from top to bottom, then spreading to the limbs. Since there is only rigor in his upper body, that would mean that with normal temperature and body conditions, it would be 4 or 5 hours after death. But since he is obese and in cold temperature, there is slower progression of rigor, leading to the maximum time in the first rigor mortis phase, 6 hours.

8 0

2 years ago