1.4 Flashcards
1
Q
Why is mass conserved in chemical reactions?
A
•Mass of products is always the same as the total mass of reactants
2
Q
What will using the right amount of new materials do?
A
Prevents wastage Saves money (make a profit)
3
Q
How to balance an equation
A
- count no of each type of atom in the reactants and products
- adjust no of molecules until the numbers are equal
4
Q
what happens during a chemical reaction?
A
products with different properties are formed as a result of atoms arranging
5
Q
when buying a product, what is the consumer often encouraged to do?
A
think about the energy used and waste produced in making the product in addition to its cost and effectiveness
6
Q
Factors affecting how much it costs to make products
6
A
materials wages energy taxes transportation research
7
Q
conservation of mass
magnesium = 24g +
chlorine 71g
how do you work out product?
A
find total of reactants (95g)
same as that
SO = 95g
