Mass 1
What is the conservation of mass rule?
Mass cannot be destroyed or created, only transformed.
This is the one- or two-letter abbreviation used to represent an element, like "H" for Hydrogen.
Chemical Symbol
Mass is defined as the total amount of _____ inside an object.
Matter
The law of conservation of mass applies to this experiment.
True or False
True
A student mixes 10 grams of baking soda with 20 grams of vinegar in a completely sealed plastic bag. What is the mass after the chemical reaction?
30 Grams
What is a compound?
A pure substance made of 2 or more different elements chemically bonded.
If 10 grams of Reactant A combines completely with 15 grams of Reactant B, the total mass of the products will be this.
25 Grams
If we added 60 grams of baking soda and 140 grams of vinegar, would the outcome be the same as the original mixture, and would the mass of it change at all?
Yes, the outcome would be the same, and the mass would stay the same.
When a piece of dry wood burns completely in an open campfire, the pile of leftover ash has significantly less mass than the original log.
True or False
TRUE because of gases like carbon dioxide and water vapor that floated into the open air.
How many atoms are in 2H2O
If you burn wood and it turns to ash, the ash weighs less because some mass escaped into the air as smoke, and this state of matter is ____.
Gas or Carbon
What is the new substance formed at the end of a chemical reaction called?
Products because
Reactants >Products
Will the Mass stay the same even after the baking soda and vinegar make the gas?
Yes, it stays the same because mass cannot be created or destroyed.
Two different elements CAN have the same atomic number and chemical symbol?
True or False
False, each element has its own atomic number and chemical symbol.
If you compress a piece of foam into a tight ball, its size decreases, but the _____ stays the same.
Mass
What does the baking soda and vinegar create to fill up the balloon?
Carbon dioxide/Gas
If you melt a solid iron bar until it melts into a glowing liquid, its total mass will ________.
Stay the same because of the conservation of mass rules.
How many atoms are in this equation
2H4C3O2
=18
If a sealed bag of potato chips expands and puffs up on a high-altitude airplane ride, the mass of the air inside the bag ______.
Stays the same
Is the inflating balloon a chemical change, a physical change, or both?
It's both because a new chemical was created (Carbon) and because the balloon physically changed, meaning we can see it with our eyes.