Podcast
Questions and Answers
What is the SI base unit for the expression 0.0123 mg?
What is the SI base unit for the expression 0.0123 mg?
- 0.0123 g
- 0.0000000123 g (correct)
- 0.0000123 g
- 0.000000123 g
Express 0.0123 μg to mg.
Express 0.0123 μg to mg.
- 0.000123 mg
- 0.0123 mg
- 0.123 mg
- 0.0000123 mg (correct)
What is the result of the expression $1.2 + 0.55 - 0.504$ when rounded to the proper number of significant figures?
What is the result of the expression $1.2 + 0.55 - 0.504$ when rounded to the proper number of significant figures?
- 1.247
- 1.25 (correct)
- 1.246
- 1.251
Which scientist is known for the Law of Conservation of Mass?
Which scientist is known for the Law of Conservation of Mass?
What does the Law of Definite Proportions state?
What does the Law of Definite Proportions state?
What is the structure of an atom comprised of?
What is the structure of an atom comprised of?
What makes atoms different?
What makes atoms different?
Why is the atomic mass in the periodic table not in whole numbers?
Why is the atomic mass in the periodic table not in whole numbers?
What is the molecular mass of (NH4)2SO4?
What is the molecular mass of (NH4)2SO4?
Which element has the atomic number Z=6?
Which element has the atomic number Z=6?
What does the mass number A represent?
What does the mass number A represent?
Why do elements within the periodic table exhibit regularities in chemical and physical properties?
Why do elements within the periodic table exhibit regularities in chemical and physical properties?
What is the average atomic mass of Carbon considering its isotopes?
What is the average atomic mass of Carbon considering its isotopes?
In a neutral atom, what is equal to the number of protons in the nucleus?
In a neutral atom, what is equal to the number of protons in the nucleus?
"Isotopes" refer to atoms that differ in:
"Isotopes" refer to atoms that differ in:
"Molecular mass" refers to:
"Molecular mass" refers to:
