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1. Which of the following correctly describes a gas?
a. It has a fixed volume and shape.
b. It has a fixed volume but does not have a fixed shape.
c. It does not have a fixed volume but has a fixed shape.
d. It does not have a fixed volume nor a fixed shape.
2. Which of the following is the symbol of the standard unit of temperature?
d. K
a. mL
b. atm
c. torr
3. Temperature and volume of a gas are directly proportional, according to
a. Combined Gas Law
b. Charles' Law
c. Ideal Gas Law
d. Boyle's Law
4. If the temperature of the gas triples, what happens to its volume at constant pressure?
a. increased by 30%
b. reduced to one-third
d. remains constant
c. tripled
5. A 25 mL bubble was released from under the sea at a pressure of 3 atm and a tempera
4°C. What will be the volume of the bubble when it reaches the surface where the press
is 1 atm and the temperature is 22 °C?
a. 7.897 L
b. 7 987 ml
c. 0.7987 L
d. 79.87 mL
6. Lipids are insoluble in water because lipid molecules are
?
a. hydrophilic
b. neutral
c. hydrophobic
d. Zwitter ions
7. Amino acids are the building blocks of which group of biomolecules?
a. proteins
b. carbohydrates
c. lipids
d. nucleic acid
8. Which of the following elements is NOT present in carbohydrates?
a. carbon
b. oxygen
c. nitrogen
d. hydrogen
9. Which of the following sugars are the components of lactose?
d galactose
b. glucose and fructose​


Sagot :

Answer:

1.A

2.C

3.B

4.A

5.D

Explanation:

Correct me if I'm wrong

Answer:

1.) D.  It does not have a fixed volume or a fixed shape.

2.) D. K

3.) B. Charles' Law

4.) C. Tripled

5.) B. 7 987 ( Not Sure )

6.) C. Hydrophobic

7.) A. Proteins

8.) C. Nitrogen

9.) Gloucose and galactose/D. Gluose and Fructose

Explanation:

1.) ?

2.) The SI unit of temperature as per the International System of Units is Kelvin which is represented by the symbol K

3.) Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant.

4.) Because if the temperature of the gas triples, same goes to the volume and constant pressure.

(e.g. If it is twiced, the volume is also twiced.)

5.) ?

6.) Liquid molecules are non polar which means they do not have charges at their poles which makes them non-reactive to polar molecules  such as water. Non-polar molecules do not dissolve in polar molecules. This nature of lipids molecule make them hydrophobic.

Hydro means water, phobic means sensitivity

7.) Amino acids are the basic building blocks of proteins.

8.) Proteins, carbohydrates and lipids are made from three basic molecules: carbon, hydrogen and oxygen. However, all proteins contain an element not found in carbohydrates and lipids is nitrogen. Nitrogen which is present in all amino acids (the building blocks that make up the protein chains).

9.) Lactose, carbohydrate containing one molecule of glucose and one of galactose linked together. Composing about 2 to 8 percent of the milk of all mammals, lactose is sometimes called milk sugar.