Regents Chemistry

This apparatus is used for which process?

• filtration

• distillation

• chromatography

• electrolysis

Tags

NGSS.HS-PS3-4

Solid aluminum has a specific heat capacity of 0.90 J/g•K. How many joules of heat are absorbed to raise the temperature of 24.0 grams of aluminum from 300. K to 350. K?

• 22 J

• 45 J

• 1100 J

• 1200 J

Tags

NGSS.HS-PS3-4

Which subatomic particles are matched with their charges?

• Protons are positive and neutrons are negative.

• Protons are positive and electrons are negative

• Protons are negative and neutrons have no charge.

• Protons are negative and electrons have no charge.

Tags

NGSS.HS-PS2-4

Which conclusion directly resulted from the “gold foil experiment”?

• Atoms are mostly empty space.

• Atoms are hard, indivisible spheres.

• Electrons are located in shells.

• Electrons have a small mass.

Atoms of which element in Group 15 have the greatest electronegativity?

• As

• Bi

• N

• P

Tags

NGSS.HS-PS1-2

What occurs during this reaction?

• Energy is released as a bond is broken

• Energy is released as a bond is formed.

• Energy is absorbed as a bond is broken.

• Energy is absorbed as a bond is formed.

Tags

NGSS.HS-PS1-4

Krypton atoms in the ground state tend not to bond with other atoms because their

• second electron shell contains eight electrons

• third electron shell contains eighteen electrons

• innermost electron shell contains two electrons

• outermost electron shell contains eight electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

All matter can be classified as

• an element

• a compound

• a mixture or an element

• a mixture or a substance

Which sample at STP has the same chemical properties as 10. grams of Al(s) at STP?

• 10. grams of Si(s)

• 10. grams of Na(s)

• 5 grams of Al(s)

• 5 grams of Mg(s)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Based on Table F, which 10.-gram sample, when thoroughly mixed with 1 liter of water at room temperature, forms a heterogeneous mixture?

• ammonium chloride, NH₄Cl

• potassium iodide, KI

• silver bromide, AgBr

• sodium nitrate, NaNO₃