Boyle's Law
According to Boyle’s law, if the temperature is constant, what is the relationship between pressure and volume?
A. no relationship
B. cannot be determined
C. inversely proportional
D. directly proportional
C. inversely proportional
According to Gay-Lussacs law, if volume is constant, what is the relationship between temperature and pressure?
A. directly proportional
B. inversely proportional
C. no relationship at all
D. its complicated
A. directly proportional
Who is the co-scientist who was the first to ascend a hydrogen balloon (1783)?
Nicolas Robert
Which particular nitrogenous base is present in DNA and not in RNA?:
A. Adenine
B. Thymine
C. Uracil
D. Cytosine
B. Thymine
Which of the following applies to the concept of Boyle's Law?
A. Aerosol can
B. Inflating balloon
C. Working syringe
D. Electric heater
C. Working syringe
What is the formula for Gay Lussac's Law?
P1 / T1 = P2 / T2
According to Charles’ law, if pressure is constant, what is the relationship between temperature and volume? Explain your answer.
A. no label
B. cannot be determined
C. inversely proportional
D. directly proportional
D. directly proportional
What type of organic compound contains C, H, O, N, P?
A. Carbohydrates
B. Lipids
C. Nucleic Acid
D. Proteins
C. Nucleic Acid
Based on the problem below:
A 45 ml sample of hydrogen gas is obtained at a pressure of 800 torr. How much additional pressure is needed to compress the gas sample into a volume of 30 ml?
Derive the formula to be used to find the unknown.
P2 = P1 V1 / V2
Refer to the problem below:
A container filled with gas has a temperature of 30 ˚C with a pressure of 300 torr. What will be the pressure in the container if the temperature is increased to 40 ˚C?
Provide the final given.
T1 = 30oC + 273 K =303 K
P1 = 300 torr
T2 = 40oC + 273 K =313 K
P2 = ?
Refer to the problem below:
A gas sample is measured with a volume of 70 ml at 50 ˚C. What is the volume if the temperature is decreased to 30 ˚C?
Provide the T1 and T2.
T1 = 50 ˚C + 273 K = 323 K
T2 = 30 ˚C + 273 K = 303 K
What type of test is used in determining the presence of carbohydrates?
A. Tollen's Test
B. Benedict's Test
C. Iodine Test
D. Ethanol Emulsion test
C. Iodine Test
A container holds 500 mL of CO2 at 20° C and 742 torr. What will be the volume of the CO2 if the pressure is increased to 795 torr?
V2 = 466.67 mL
How does a pressure cooker work? Explain the mechanism using Gay Lussac's Law.
When heated, the pressure inside the container caused by steam increases. An increase in both temperature and pressure is what makes the food cook faster as compared to other conventional ways of cooking.
Based on the given situation, what is the answer to the problem?
A sample of argon has a volume of 250 mL at 50 ˚C. At what temperature in ˚C (Celsius) will it have a volume of 101 mL?
T2 = -142.51 ˚C
What type of test is used in determining the presence of protein?
A. Biuret Test
B. Benedict's Test
C. Iodine Test
D. Ethanol Emulsion Test
A. Biuret Test
A sample of neon occupies a volume of 461 mL at STP. What will be the volume of the neon when the pressure is reduced to 693.3 mmHg?
V2 = 505.35 mL
The gases in a hair spray can are at a temperature of 27 ˚C and at STP. If the gases in the can reach a pressure of 5.0 atm, the can will explode. To what temperature must the gases be raised in order for the can to explode? Assume constant volume.
T2 = 1500 K
Based on the given situation, what is the answer to the problem?
A sample of hydrogen has an initial temperature of 75 °C. When the temperature is lowered to -17.0 °C, the volume of hydrogen becomes 211 cm3. What was the initial volume of the hydrogen in dm3?
V1 = 0.29 dm3
How are biomolecules important to every organism?
These biomolecules are fundamental building blocks of living organisms, and therefore, the presence and appropriate concentrations of biomolecules are vital for the structure and proper function of living cells.