Answer:
Explanation:
The law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. This can be gleaned from the third postulate in Dalton's series. Magnesium oxide decomposes into magnesium and oxygen. If 4.03 g of magnesium oxide decomposes to form 2.43 g of magnesium, what mass of oxygen gas is also released in the reaction
The word say magnesium oxide decomposes to magnesium and oxygen
the chemical symbols say
MgO-----------> Mg + O2 (since natural oxygen is diatomic)
the balanced equation says
2MgO-------------->2Mg + O2
4.03 gm----------> 2.43 + ?0 gms
tour high school Algebra I class says
? = 4.03 -2.43 =1.60
your chemical analytcal lab says %mO in MgO = 16/40.3 = 39.7%
your calculator says
39.7/100 X 4.03 = 1.60
all of these prove the law of conservation of mass
Answer:
d
Explanation:educated guess
Step 1: Write the chemical formula.
Step 2: List all the atoms.
<span>Step 3: </span>Count<span> the number of </span>atoms<span> of each element in 1 molecule.
Step 4: Multiply the number of </span>atoms<span> of each by the coefficient.
Step 5: Make sure your answer makes sense.</span>
Answer:
A
Explanation:
It's not moving so it would be going 0 meters per second