question 13 (4 points)
(01.06 mc)
the gas carbon dioxide is a pure substance. which of the following is true about carbon dioxide?
a carbon and oxygen retain their individual properties.
b carbon and oxygen are chemically bonded in it.
c it can be separated into carbon and oxygen using physical methods.
d the proportion of carbon and oxygen is different in different samples of the gas.

question 14 (4 points)
(01.06 mc)
which of the following correctly describes a mixture?
a the particles are chemically bonded together, and they retain their individual physical and chemical properties.
b the particles are not chemically bonded, and they can only combine in certain set ratios.
c the particles do not retain their individual chemical properties, and they can only be separated by chemical means.
d the particles have no set ratio for how to combine, and they can be separated by physical means.

question 15 (4 points)
(01.07 lc)
which piece of laboratory equipment would be used to grind substances into a powder?
a beaker
b thermometer
c mortar and pestle
d balance scale

Question

question 13 (4 points)
(01.06 mc)
the gas carbon dioxide is a pure substance. which of the following is true about carbon dioxide?
  a  carbon and oxygen retain their individual properties.
  b  carbon and oxygen are chemically bonded in it.
  c  it can be separated into carbon and oxygen using physical methods.
  d  the proportion of carbon and oxygen is different in different samples of the gas.

question 14 (4 points)
(01.06 mc)
which of the following correctly describes a mixture?
  a  the particles are chemically bonded together, and they retain their individual physical and chemical properties.
  b  the particles are not chemically bonded, and they can only combine in certain set ratios.
  c  the particles do not retain their individual chemical properties, and they can only be separated by chemical means.
  d  the particles have no set ratio for how to combine, and they can be separated by physical means.

question 15 (4 points)
(01.07 lc)
which piece of laboratory equipment would be used to grind substances into a powder?
  a  beaker
  b  thermometer
  c  mortar and pestle
  d  balance scale

Accepted Answer

### Question 13
# Brief Explanations:
- Option a: In a compound (like CO₂), elements lose individual properties, so a is wrong.
- Option b: CO₂ is a compound with C and O chemically bonded, so b is correct.
- Option c: Compounds need chemical methods to separate elements, so c is wrong.
- Option d: Pure substances have fixed proportions, so d is wrong.
# Answer:
b. Carbon and oxygen are chemically bonded in it.

### Question 14
# Brief Explanations:
- Option a: Mixtures have no chemical bonding, so a is wrong.
- Option b: Mixtures have no set ratios, so b is wrong.
- Option c: Mixture components retain properties and are separated physically, so c is wrong.
- Option d: Mixtures have no set ratio and are separated physically, so d is correct.
# Answer:
d. The particles have no set ratio for how to combine, and they can be separated by physical means.

### Question 15
# Brief Explanations:
- Option a: Beaker holds liquids, not grind, so a is wrong.
- Option b: Thermometer measures temperature, so b is wrong.
- Option c: Mortar and pestle grind substances to powder, so c is correct.
- Option d: Balance scale measures mass, so d is wrong.
# Answer:
c. Mortar and pestle

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 13

Answer:

Question 14