WorksheetsCore UNIT 1.1 Review: The Law Conservation of Matter
Total questions: 17
Worksheet time: 4hrs 1mins
What will weigh more when a chemical change is complete assuming a closed system? The reactants before the chemical reaction, or the product after the reaction is complete?
They both will weigh the same
The product always weighs more than the reactant
The reactant will weigh more than the product
They both will loose mass after the reaction
Mrs. Roth's tea cup and hot tea weigh 100 grams. She stirs in 10 grams of sugar. How much is the total amount of matter in Mrs. Roth's tea cup and tea now?
100 grams
110 grams
90 grams
A boiling pot of water on a stove is what type of system
Closed System
Open System
Isolated System
Suppose steel wool is placed inside a container and is then sealed closed. The flask is then heated until the steel wool partially burns but then goes out. This is similar to what we did in the lab except that the steel wool is inside a closed container. Select the true statement(s)
The total mass of the container and the steel wool will remain the same
The total mass of the container and the steel wool will decrease because some of the steel wool is converted into energy.
The total mass of the container and the steel wool decrease because some of the atoms inside the steel wool are destroyed by the heat.
The total mass of the container & steel wool will increase.
If a chemical reaction occurs in an open system (not contained), what might happen to the measurable mass of the products when compared to the reactants?
the measurable mass might decrease because any gas produced can escape (the actual mass would stay the same)
the mass would increase because mass was created
the measurable mass would stay the same because nothing would be able to leave the system.
it depends on the type of reaction
The picture above represents matter particles before a chemical reaction takes place. Assuming a closed system, what picture below could represent the products? Note: More than one answer could be correct.
10 g of a solid chemical reacts with a 10 g of a liquid chemical, the reaction bubbles and changes the color of the liquid. The colored liquid weighs 13 g, what can be concluded? Select all answers that apply.
Open system
closed system
a gas produced with a mass of 7 grams
no matter escaped the system
a gas produced with a mass of 10 grams.
In a scientific investigation, a system...
Can be basically be anything you want to study
Must be closed
Must be open
Must involve an electronic balance
The blue circle is our system.
The surroundings is the yellow circle only
The surroundings include the red circle, yellow circle, and Black Square
The surroundings is the red circle and yellow circle only
