WorksheetsPS Ch 7 Review Formative
Total questions: 10
Worksheet time: 5mins
In the following equation, which are the reactants?
NaHCO3 + HCl ---> NaCl + H2O + CO2
NaHCO3 and HCl
NaHCO3 and NaCl
HCl and NaCl
NaCl, H2O, and CO2
Which of the following is a statement of the law of conservation of mass?
mass is created but not destroyed
mass is destroyed but not created
mass is neither created nor destroyed
mass is both created and destroyed
The mass of a hydrogen atom is 1.0 amu, and the mass of a carbon atom is 12.0 amu. What is the molar mass of methane, CH4?
16.0 amu
16.0 g
13.0 g
52.0 g
In what type of reaction does one reactant form two or more products?
synthesis
single replacement
decomposition
double replacement
What particle is transferred from one atom to another in a redox (oxidation-reduction) reaction?
electron
proton
neutron
atom
Which type of reaction is the following?
2Na + 2H2O ---> H2 + 2NaOH
synthesis
single replacement
decomposition
combustion
In a chemical reaction, the bonds in the products are broken, and the bonds in the reactants are formed.
true
false
What type of reaction always releases energy?
endothermic
exothermic
decomposition
single replacement
In general, an increase in temperature will
increase reaction rate
decrease reaction rate
not affect reaction rate
act as a catalyst
What takes place at chemical equilibrium?
reactants form more quickly than products
products form more quickly than reactants
reactants and products stop forming
reactants and products form at the same rate
