Atoms Part 1 (History)

The phlogiston theory has a lot of modern day experimentation backing it up.

• True
• False

If 29 g of water are formed from a reaction of 5 g hydrogen and X g oxygen, X = ?

• 34 g
• 20 g
• 24 g
• 29 g

If 14 g of Na react completely with 21 g of Cl, how many g of NaCl formed?

• 7 g
• 35 g
• 21 g
• 14 g

If the mass percent of oxygen in water is 89%, what is the mass fraction of oxygen in water?

• 0.89
• 8.9
• 89
• 0.089

If water contains 11.11% hydrogen by mass, how many grams of hydrogen could be produced from 100 g of water?

• 7.44 g
• 11.11 g
• 4.67 g
• 13.56 g

If water contains 11.11% hydrogen by mass, how many grams of hydrogen could be produced from 67 g of water?

• 7.44 g
• 11.11 g
• 4.67 g
• 13.56 g

If a phone case and a water bottle are made from the same type of plastic, they have the same elemental % composition.

• True
• False

Which of the following is NOT part of Dalton's atomic theory?

• Atoms are tiny particles that make up matter.
• Atoms can rearrange to form different compounds.
• A particular compound always has the same number and type of atoms in it.
• Atoms break into individual protons/neutrons/electrons when they react.

Atoms of different types will always be different elements.

• True
• False

Cathode ray tube experiments were instrumental in the discovery of protons.

• True
• False