Q.1.
The number to the lower side of an element is a
Q.2.
Na + Cl ------------> NaCl is a
Q.3.
CO2 ---------> C + O2 is a
Q.4.
If a reaction starts with a totalof reactants it should produce
Q.5.
2KClO3 ---------> 2KCl + 3O2 is a
Q.6.
2C2H2 + 5O2 -------> 4CO2 + 2His a
Q.7.
C6H+ O2 ------> CO2 + His a
Q.8.
In a synthesis reaction one reactant has a masss ofand the second reactant has 12g. How much mass should the product of this reaction have?
Q.9.
Which of these is a chemical reaction?
Q.10.
Oxygen must be present for what kind of reaction to occur?
Q.11.
In the reaction AB-----> A + B reactant AB hasand product B has 5g. How many grams should product A have?
Q.12.
If a reaction producesgrams, and one of its reactants hadgrams, how much did the other reactant had?
Q.13.
The dissolving of ice tea powder in water is
Q.14.
Does the equation H2+O2 →Hfollow the Law of Conservation of Mass?
Q.15.
Law of conservation of mass states the amounts of atoms in the reactants and the products...
Q.16.
How many atoms do you have in the chemical formula 2Mg(ClO3)2?
Q.17.
How many Ca (Calcium) atoms are found in Ca(OH)2?
Q.18.
How many atoms do you have in the compound 2MgCl2?
Q.19.
A squid pushes water back with its tentacles to allow it to swim forward.
Q.20.
A person walks out of a store with a pillow at the top of an overflowing shopping cart. While walking to the car, the cart’s wheel hits a large rock, causing the cart to suddenly stop. The pillow slides forward.