0 of 10 Questions completed
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 10 Questions answered correctly
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Check how well you did on your assessment and update your proficiency sheet accordingly.
|Table is loading|
|No data available|
Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?
What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?
Suppose a reaction were to happen in an open container in a lab. During the reaction, the scientist observes the chemicals bubble, and produce a gas. During the analysis the scientist notices that the reactants weighed 24 g when he started, and the product weighed 19 g. Explain what happened.
If there are 8 Fluorine atoms on the reactant side, how many Fluorine atoms will be on the product side?
The Law of Conservation of Matter states that…
Use the following diagram to match the correct answers with the questions below:
|Substances Measured||Mass (in grams)|
|Empty cup||2.8 g|
|Cup, baking soda and vinegar (before the reaction)||9.018 g|
|Cup, baking soda and vinegar (after the reaction)||8.347 g|
What is the mass of the reactants before the reaction?
What is the apparent change in mass of the reacting substances?
Why did the mass go down after the reaction?
The Law of Conservation of Matter is the reason why a chemical equation MUST be
Check ALL of the following chemical reactions that demonstrate the Law of Conservation of Mass?
How many atoms of oxygen are on each side of the following equation: 4Al + 3O2 –> 2Al2 O3
Does the following chemical equation demonstrate the Law of Conservation of Matter?
2H2O + O2 –> 4MgO + 3Fe