Moles Practice

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.HS-PS1-7

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

Tags

NGSS.HS-PS1-7

Balance this equation
_Al +_HCl --> _H₂ +_AlCl₃

• 2, 6, 3, 2
• it is already balanced
• 4, 12, 3, 4
• 2, 1, 4, 5

Tags

NGSS.HS-PS1-7

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1
• 2,1,2,1
• 1,2,1,2
• 0,2,0,2

Tags

NGSS.HS-PS1-7

Balance this equation
_N₂ + _H₂ --> _NH₃

• 1,2,3
• 1,3,2
• 1,1,2
• 2,1,1

Tags

NGSS.HS-PS1-7

Balance this equation-
_SeCl₆+_O₂>_SeO₂+_Cl₂

• 1,2,1,2
• 1,1,1,3
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.HS-PS1-7

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴

What is the molar mass of sodium?

• 11
• 22.990
• 45.98
• 3

Tags

NGSS.HS-PS1-1

How many moles of copper (II) chlorate contain 1.45x10²¹ formula units?

• 8.73x10⁴⁴
• 1.20x10²⁴
• 0.00241
• 1.45

Tags

NGSS.HS-PS1-7

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol