CHEMISTRY COLLEGE

Show the conversion factor from Patolbf/ft2is 0.02089.

Answers

Answer 1

Answer:

Explanation:

1 Pascal = 1 N/m²

To convert Pa to lbf/ft²

So, the conversion of N to pound force (lbf) is shown below as:

1 N = 0.224809 pound force (lbf)

The conversion of m² to ft² is shown below:

1 m² = 10.7639 ft²

So,

[tex]1\ Pa=\frac {1\ N}{1\ m^2}=\frac {0.224809\ lbf}{10.7639\ ft^2}

1 Pa = 0.02089 lbf / ft²

Hence proved.

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Two identical sister chromatids are held together at whatregion on a duplicated chromosome?
a Chromatin
b Centromere
C Centriole
Check it

Answers

After DNA duplication, the chromosome becomes composed of two identical structures, called sister chromatids, which are joined at the centromere area.

Final answer:

Sister chromatids are held together at the centromere on a duplicated chromosome. The centromere serves as the point of attachment. Chromatin and centrioles do not serve this function. The correct option is b) Centromere.

Explanation:

Two identical sister chromatids are held together at the centromere on a duplicated chromosome. The centromere serves as the point of attachment for sister chromatids. During cell division, the spindle fibers attach themselves to the centromere to pull apart the sister chromatids into two separate cells. This process helps ensure that each new cell receives an identical and complete set of chromosomes. Neither chromatin nor centriole holds sister chromatids together. Chromatin refers to the material chromosomes are made up of, which includes DNA and protein, while centrioles are involved in cell division. In summary, the precise answer to your question is option b) Centromere.

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What does dry ashing mean

Answers

Dry ashing refers to the use of a muffle furnace capable of maintaining temperatures of 500–600°C. Water and volatiles are vaporized, and organic substances are burned in the presence of oxygen in air to CO 2 and oxides of N 2. Most minerals are converted to oxides, sulfates, phosphates, chlorides, and silicates. Hope this helped!

Why is predicting our future oil supply controversial and involves some uncertainty?I just need some explaining.

Answers

Natural resources such as oil that are as yet undiscovered are very difficult to predict or estimate; this creates huge uncertainty and large errors in even the most rigorous scientific efforts to predict future supply. Changes in oil drilling and discovery technology can and will completely change the eventual results in the search for undiscovered resources. The controversy lies in the desire to eliminate oil from the world's energy mix in order to prevent a perceived but uncertain risk of global warming and the desire to encourage the use of alternative energy in order to reduce that risk, even though so far no alternative energy source other than natural gas, coal, and nuclear energy has been able to compete with oil economically.

The Problem with predicting things like our natural supply of oil can be picked out to a LOT of different variables. For starters, we find a lot of oil in a myriad of different places. The frequency in which we find this oil could theoretically be linked to a computer and predicted like Stocks. But then again, since the rate changes almost as much as the finding sites, You can easily be slapped aside by prehistoric biology and geology. The other problem with predicting our supply is often controversial; "How much do we use" well, you have to look at individual countries or the entire planet. And that alone is a lot of work. Imagine knocking on your neighbor's door and asking exactly how much hot water he uses.... Every day.... For a year! Pretty creepy right? Not to mention intrusive. But the internet has some of these things, So lets say you managed to find the frequency of oil findings globally, and the rate of use for these areas. Well now you have even more problems. Because there are many different people looking for oil. And when they find it. They sell it. Or they sue eachother over who found it first. Because underground supplies are huge at times. Often companies will be drilling the same one. To get an exact count from one company you would need to track all of the oil possessed by them and the buyers, which is paperwork. Which is Highly variable depending on who you are counting from. Without Tainting your next variable. "Current processed supply." ie. The stuff already out of the ground. If you have got all of that counted and punched into the smartest computer you can find. Then you still have some data to collect. Because the numbers are always changing. And everyone uses a different amount every day. This alone can stop any predictions cold for obvious. Reasons. So in conclusion, There literally is a large amount of Static variables and a few constant variables to consider when predicting future supply. This is why simply internet searching these things often gives numbers that are highly different from eachother. Being both controversial and uncertain.

State and explain grahms law of diffusion

Answers

Answer:

Graham's law of effusion was formulated by Scottish physical chemist Thomas Graham in 1848. Graham found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. This formula can be written as: , where: Rate₁ is the rate of effusion for the first gas.

Explanation:

r1 = rate of effusion for gas 1

r2 = rate of effusion for gas 2

M1 = molar mass of gas 1

M2 = molar mass of gas 2

15.0 L of an ideal gas at 298 K and 3.36 atm are heated to 383 K with a new pressure of 5.60 atm. What is the new volume in liters

Answers

Answer:

$V_2=11.6L$

Explanation:

Hello!

In this case, since we volume, pressure and temperature which are all changing, we can use the combined ideal gas law to write:

$(P_1V_1)/(T_1) =(P_2V_2)/(T_2)$

Thus, since the final volume V2 is required, by solving for it, we write:

$V_2=(P_1V_1T_2)/(T_1P_2)$

In such a way, we plug in the given data to obtain:

$V_2=(3.36atm*15.0L*383K)/(298K*5.60atm)\n\nV_2=11.6L$

Which means that the process compressed the gas.

Best regards.

Final answer:

To find the new volume, we can use the combined gas law equation.

Explanation:

To solve this problem, you can use the combined gas law equation, which relates the initial and final conditions of pressure, volume, and temperature.

The combined gas law equation is: P1 * V1 / T1 = P2 * V2 / T2

Substituting the given values into the equation, we can solve for the new volume:

(3.36 atm * 15.0 L) / 298 K = (5.60 atm * V2) / 383 K

Simplifying and solving for V2, the new volume, we find V2 = 11.78 L.

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Research Hypatia's achievements in the worldof science.

What is she most known for?

Write down three interesting facts about her

life.

Answers

Answer:

See explanation

Explanation:

Hypatia is popular for her work in mathematics. She also did some work in the area of astronomy. Her well know work in mathematics is her ideas about conic sections.

She was born the Theon of Alexandria and she was a professional mathematician in her life time.

She was the greatest mathematician of her time and she was telling leader of the Neoplatonist school of philosophy in Alexandria. By so doing, she conquered the culture of sexism in her time.

She was trained by her father in mathematics and eventually replaced him. She was the last major mathematician in the Alexandrian tradition.

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