Chemistry Foundations

The formula for AgNO_{3 represents a compound made of which atoms?}

• 1 Ag, 1 N, 1 O

• 1 Ag, 1 N, 3 O

• 1 Ag, 3 N, 3 O

• 3 Ag, 3 N, 3 O

Tags

NGSS.MS-PS1-1

Which is an example of an element?

• air

• water

• sodium

• sugar

Which property explains why copper often is used in electrical wiring?

• conductivity

• density

• magnetism

• solubility

Tags

NGSS.MS-PS2-3

The table shows densities for different substances. For which substance would a 4.90-g sample have a volume of 3.10cm³?

• Substance 1

• Substance 2

• Substance 3

• Substance 4

Tags

NGSS.MS-PS1-2

Which would decrease the rate of a chemical reaction?

• increase in concentration

• increase in temperature

• decrease in surface area

• increase in both surface area and concentration

Tags

NGSS.HS-PS1-5

Which physical change is represented by the diagram below?

• condensation

• deposition

• evaporation

• sublimation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which chemical equation is unbalanced?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-5

What is a size-dependent property?

• boiling point

• conductivity

• Density

• mass

Tags

NGSS.MS-PS1-5

Why is the following chemical equation said to be balanced?

• There are more reactants than products.

• There are more products than reactants.

• The atoms are the same on both sides of the equation.

• The coefficients are the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

The elements sodium (Na) and (Cl) react and form the compound sodium chloride (NaCl). Which is true about the properties of these substances?

• Na and Cl have the same properties.

• NaCl has the properties of Na and Cl.

• All the substances have the same properties.

• The properties on NaCl are different from the properties of Na and Cl.

Tags

NGSS.MS-PS1-2