Is this a chemical or physical process? CO_2(g) → C_(s) + O_2(g)

• chemical

• physical

• both chemical and physical

Tags

NGSS.HS-PS1-2

Is this a chemical or physical process? H₂O_(s) → H₂O_(l)

• chemical

• physical

• both chemical and physical

Tags

NGSS.MS-PS1-4

Is this a chemical or physical process? MgCl_2(s) → Mg⁺²_(aq) + 2Cl^-1_(aq)

• chemical

• physical

• both chemical and physical

Tags

NGSS.HS-PS1-2

What coefficients balance this equation? ___Na + ___ZnI₂ → ____NaI + ___Zn

• 1,2,1,2

• 2,1,2,1

• 2,2,2,1

• 1,1,2,1

Tags

NGSS.HS-PS1-7

What coefficients balance this equation? ___N₂ + ___H₂ → ____NH₃

• 1,3,2

• 2,1,2

• 2,3,1

• 1,2,3

Tags

NGSS.HS-PS1-7

Which substance is the precipitate in this reaction? FeCl_{3(aq) +} NaOH_(aq) → Fe(OH)_3(s) + NaCl_(aq)

• FeCl₃

• NaOH

• Fe(OH)₃

• NaCl

What are the spectator ions in this reaction? Fe⁺³_(aq) + 3Cl^-1_(aq) + Na⁺¹_(aq) + OH^-1_(aq) → Fe(OH)_3(s) + Na⁺¹_(aq) + Cl^-1_(aq)

• Fe⁺³ and Cl^-1

• Na⁺¹ and Cl^-1

• Fe⁺³ and Na⁺

• Na⁺¹ and OH^-1

What is the net ionic equation for this reaction? Fe⁺³_(aq) + 3Cl^-1_(aq) + Na⁺¹_(aq) + OH^-1_(aq) → Fe(OH)_3(s) + Na⁺¹_(aq) + Cl^-1_(aq)

• Fe⁺³ _(aq) + OH^-1_(aq) → Fe(OH)_3(s) 

• Na⁺¹_(aq) + Cl^-1_(aq) → NaCl_(aq)

• Fe⁺³_(aq) + 3Cl^-1_(aq) + Na⁺¹_(aq) + OH^-1_(aq) → Fe(OH)_3(s) + Na⁺¹_(aq) + Cl^-

Tags

NGSS.HS-PS1-7

Precipitates are ____________________________ in solution.

• miscible

• soluble

• insoluble

Spectator ions _____________________________.

• undergo chemical change during a chemical reaction.

• do not undergo chemical change during a chemical reaction.

• wear spectacles during a chemical reaction.