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What is important to remember when working with hot plates and burners?

• It's ok to walk away.

• Hot plates and burners are not dangerous.

• Hot plates and burners should not be left unattended.

• Hot plates and burners are fireproof.

Lab waste materials can only poured down the drain, if

• you use a lot of water to wash them down.

• It is never ok to pour stuff down the drain.

• the teacher gives you permission to do so.

• they are clear liquids.

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

What would be the mass of 1.5mol H₂O

• 20
• 27
• 32
• 40

How many moles are there in 12.7g of CaF₂?

• 0.20 mol
• 1,000.76 mol
• 6.14 mol
• 0.16 mol

How many moles of (NH₄)₂O are present in 74.9 g?

• 3,907.0  moles
• 1.44 moles
• 8.67x10²³moles
• 0.79 moles

NaNO₂

• sodium nitrate

• sodium (II) nitrate

• sodium nitrite

• sodium (I) nitrite

Ca(OH)₂

• calcium (II) hydroxide

• calcium hydroxide

• calcium oxide

• calcium (II) oxide

CuS

• copper sulfide

• copper (I) sulfide

• copper (II) sulfide

• copper (i) sulfate

As₄O₁₀

• arsenic oxide
• quadarsenic decoxide
• tetraarsenic decoxide
• arsenic decoxide