Mass and energy are conserved
Question 16 options:
A)
only in chemical c...
Chemistry, 16.10.2020 02:01 kaliyab191
Mass and energy are conserved
Question 16 options:
A)
only in chemical changes.
B)
in chemical changes and physical changes.
C)
always in physical changes and sometimes in chemical changes.
D)
only in physical changes.
Question 17 (5 points)
Which of the following can't be broken down any further chemically?
Question 17 options:
A)
Compounds
B)
Elements
C)
Matter
D)
Molecules
Question 18 (5 points)
A/an is the smallest unit of matter that has the characteristics of a chemical element.
Question 18 options:
A)
atom
B)
proton
C)
molecule
D)
electron
Question 19 (5 points)
The distance between consecutive peaks or troughs in a wave is
Question 19 options:
A)
frequency.
B)
displacement.
C)
amplitude.
D)
wavelength.
Question 20 (5 points)
The phase transition of dry ice (frozen carbon dioxide) to gas is an example of
Question 20 options:
A)
condensation.
B)
sublimation.
C)
deposition.
D)
vaporization.
Answers: 3
Chemistry, 22.06.2019 05:00
What forms when chemical reactions combine pollution with sunlight?
Answers: 1
Chemistry, 22.06.2019 14:00
Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?
Answers: 2
Chemistry, 22.06.2019 16:00
If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml
Answers: 1
Chemistry, 23.06.2019 00:00
How do you determine the percent yield of a chemical reaction
Answers: 1
Mathematics, 12.12.2019 20:31
Mathematics, 12.12.2019 20:31
Business, 12.12.2019 20:31
Mathematics, 12.12.2019 20:31
English, 12.12.2019 20:31
Mathematics, 12.12.2019 20:31
Mathematics, 12.12.2019 20:31
History, 12.12.2019 20:31
Mathematics, 12.12.2019 20:31
History, 12.12.2019 20:31