What is the " 6.02x10^23 ?

• Planck Constant
• Avogadro's Numbers
• Light Speed
• Mol Number

How many atoms are there in a (NH₄)₂ HPO₄ molecule?

• 11
• 5
• 16
• 8

How many atoms are there in 2.2 mole of NaOH atom?

• 6.6 mol of atoms
• 2.2 mol of atoms
• 3 mol of atoms
• 4 mol of atoms

How many gram is 0.5 mol of Copper atoms? (Cu:63,5g/mol)

• 63,5 g
• 6,35 g
• 31,75 g
• 3,175 g

Tags

NGSS.HS-PS1-7

What is the mol number of 250 g CaCO₃ ? (Ca:40g/mol, C:12g/mol, O:16g/mol)

• 1,5 mol
• 1 mol
• 2 mol
• 2,5 mol

 How many atoms are there in 12,04x10²³  molecules of NaOH?

• 12,04x10²³
• 36,12x10²³
• 36,12x10²⁴
• 12,04x10²³

What is the mole number of Mg(OH)₂ that contains 16 moles of hydrogen atom?

• 8 mol
• 2 mol
• 16 mol
• 32 mol

What is the number of moles of 2240 liter dihydrogen monosulfur gas at STP?

• 100 mol
• 10 mol
• 1 mol
• 0,1 mol

What is the volume, in cm³, of 12.04x10²³ CO₂ molecules at STP?

• 22,4 L
• 11,2 L
• 5,6 L
• 44,8 L

3 Fe + 2O₂  --> Fe₃O₄ According to above reaction, how many gram of iron is needed to produce 464 g of Fe₃O₄? (Fe:56g/mol, O:16g/mol)

• 336 g
• 268 g
• 112 g
• 56 g