Chemistry Answers

A 25.0 L tank contains 2.0 kg of neon gas with a pressure of 98.0 atm at 25°C. How many kilograms of O₂ can fill the tank under the same pressure and temperature?

Combustion: C

2

H

4

(g)+O

2

(g)⟶

Δ

–

–

You are designing a new life form, 

and in order to ensure your creation doesn't mutate out of control,

you made a modification to normal life as we know it.

Instead of a triplet code for protein synthesis, you have adapted a quadruplet code.

It was quite exhausting to do, so you just let your intern come up with the codons.

Your intern decided to just go with adding an extra adenine to the end of each of the normal protein codons.

Too tired to argue, you decided to just go with it.

You need to get this organism to synthesize a polypeptide that is composed solely of 5 tryptophan in a chain.

From 5' to 3', what DNA template strand must exist in this organism in order for the above chain to be synthesized?

Differentiate between an amorphous and a crystalline solid.

Identify the property of water that explains why:

1. Humans can maintain their body temperature.

2. Water expands when cooled.

3. There is a large drop in temperature during evaporation.

4. A coin dropped on the surface of a water-filled container does not overflow

How many moles are in 3.28x10^23 atoms of Na

A sample of nitrogen gas occupies a volume of 2.00 L at 756 mmHg and 0.00 C. The volume increases by 2.00 L and the temperature decreases to 137 K. What is the final pressure exerted on the gas?

The initial temperature of a 1.00 liter sample of argon is 20 C. The pressure is decreased from 720 mmHg to 360 mmHg and the volume increases to 2.14 liters. What was the change in temperature of the argon?

322 L of hydrogen occupies a volume of 197 L at STP. If the initial temperature of the hydrogen was 37 C, what was its initial pressure?

A sample of argon has a volume of 5.0 dm³ and the pressure is 0.92 atm. If the final temperature is 30C, the final volume is 5.7 L, and the final pressure is 800 mmHg, what was the initial temperature of the argon?