Molecular Formula and Compounds

How many different elements are in this chemical formula: C₂H₂ClK₃

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

Which of the following chemical formulas represents a compound?

• C₃

• O₂

• H₂

• CH₃CHO

Tags

NGSS.MS-PS1-1

Which best describes a compound?

• found on the periodic table

• made from two or more elements

• only 100 in the world

• a pure substance

Compounds are represented by a...

• Capital Letter

• Chlorine

• Chemical formula

• Chemical symbol

How many of each atom are in the compound above?

• 1 magnesium atom, 2 iron atoms, and 4 oxygen atoms

• 3 magnesium atoms, 2 iron atoms, and 4 oxygen atoms

• 6 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

• 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

Tags

NGSS.MS-PS1-1

2 CH₂CO₃OH

• 4

• 6

• 8

• 2

• 3

• 1

• 5

• 7

• 9

• 10

Answer explanation

The correct answer is 4 because there are 2 carbon atoms in the molecule CH2CO3OH.

Tags

NGSS.MS-PS1-1

Match the following

• made of 2 hydrogen atoms

• C₂H₆

• 2 carbon atoms and 6 hydrogen atoms

• H₂

• 1 magnesium atom, 2 chlorine atoms

• H₂O₂

• 2 hydrogen atoms and 2 oxygen atoms

• MgCl₂

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

How many different elements are represented in the compound?

Fe₃O₄

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

A way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.

• Molecule

• Physical change

• Coefficient

• Chemical formula

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:

H₂SO₄

• 3

• 5

• 6

• 7

Tags

NGSS.MS-PS1-1