Naming compounds
Law of conservation
Types of chem reactions
Endothermic or Exothermic
100
What is the name of the product of the following chemical reaction? Na + Cl ->
Sodium Chloride
100
How does the concept of conservation of mass apply to chemical reactions?
A. The change in the amount of matter is only a small percentage of the total mass.
B. The reactants and products have exactly the same molecules.
C. The change in the amount of matter is equal to the change in energy.
D. The reactants and products have exactly the same atoms.
D. The reactants and products have exactly the same atoms.
100
Name and describe the 4 major types of reactions.
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100
Give the definition of the following root words:
"Exo-"
"Endo-"
"Thermal"
Exo means outside
endo means inside
thermal means heat
200
What is the correct name for the compound with the formula NH4 NO2 ?
A. Ammonia nitrite
B Ammonium nitrite
C Ammonia nitrate
D Ammonium nitrate
B Ammonium nitrite
200
The reaction between sodium and chlorine that forms table salt is shown.
__Na(s)+ Cl2(g)→__NaCl(s)
What coefficient should be added to the blanks to balance the equation?
2
200
Photosynthesis? Explain why.
Endothermic because plants are absorbing heat from the surroundings.
300
Name and describe the chemicals in the equation below: __Ag2S → __Ag + __S8
A. Argon sulfide decomposes to yield silver and sulfur
B. Silver sulfide decomposes to yield silver and sulfide
C. Silver sulfide decomposes to yield silver and sulfur
C. Silver sulfide decomposes to yield silver and sulfur
300
Which equation demonstrates the law of conservation of mass?
A. C + O2 → C2O
B. H2SO4 + Zn → 4ZnSO + H2
C Mg + S → MgS2
D. 2H2 + O2 → 2H2O
D. 2H2 + O2 → 2H2O
300
Select all of the examples that show a synthesis reaction.
A.2HCl + Zn → ZnCl2+H2
B. 2Al+ 3Br2 → 2AlBr3
C. 2H2O → 2H2+O2
D. Cu+O2 → CuO2
E. NaCl → Na + Cl
B. 2Al+ 3Br2 → 2AlBr3
D. Cu+O2 → CuO2
300
When the energy used to break the bonds in the reactants is greater than the energy given out when bonds are formed in the products. This means that overall the reaction takes in energy. Endothermic or exothermic? EXPLAIN.
This is endothermic because energy is absorbed. All energy has some level of heat, so this is describes an endothermic process.
400
Write out the full chemical formula for
Na(ClO3) (s) → NaCl (s) + O2 (g)
Sodium chlorate decomposes into sodium chloride and oxygen gas.
400
Is this chemical equation balanced?
2 H2O → 2 H2O + O2
A. No, because the mass of the reactants is greater than the mass of the products
B No, because the coefficient of the reactant is less than the sum of the coefficients of the products
C Yes, because the mass of the reactants is greater than the mass of the products
D Yes, because each atom in the reactants is found in the products
A. No, because the mass of the reactants is greater than the mass of the products
400
Select all of the single replacement reactions (2).
A. Ca(OH)2→CaO+H2O
B. Zn+2HCl→ ZnCl2+H2
C. 6CO2+6H2O→ C6H12O6 + 6O2
D. Fe+ Cu(NO3)2→ Cu + Fe(NO3)2
E. H2SO4+2NaOH→Na2SO4+2H2O
B. Zn+2HCl→ ZnCl2+H2
D. Fe+ Cu(NO3)2→ Cu + Fe(NO3)2
400
Is cooking an egg endothermic or exothermic in reference to the egg? Explain
Endothermic - the egg absorbs heat from the pan and does not release any to the environment.
500
Write the FULL chemical equation for the following:
Copper (II) Chloride reacts with Aluminum metal to yield Aluminum chloride and copper.
A. Cu2Cl + Al(s) → AlCl3(s) + Cu(s)
B. CuCl2 + Al(s) → AlCl3(s) +Cu(s)
C. CuCl + Al(s) → AlCl(s) +Cu(s)
B. CuCl2 + Al(s) → AlCl3(s) +Cu(s)
500
Does this the following equation obey the law of conservation of mass? Show your work.
Al4C3(s) + 6H2O(l) → 3CH4(g) + 4Al(OH)3(s)
No, oxygen has 6 atoms in the reactants, but 12 in the products.
500
Select all of the double replacement reactions (2).
A. CaO + CO2→ CaCO3
B. Na2CO3→ Na2O + CO2
C. KCl + AgNO3 → AgCl + KNO3
D. Cu + Ag(NO3)2→ Ag + Cu(NO3)2
E. H2SO4+2NaOH→ Na2SO4 + 2H2O
C. KCl+AgNO3→AgCl+KNO3
E. H2SO4+2NaOH→Na2SO4+2H2O
500
During the process of digestion, complex substances such as starch carbohydrates and proteins are broken down into simpler form such as simple sugar and amino acids respectively. Energy is produced in the process of digestion: Exothermic or endothermic.? EXPLAIN.
Digestion is an exothermic reaction because energy is released, and heat is produced in the process.
Double or nothing: Digestion is a part of the process known as: A. Diuresis B. Metabolism C. Anabolism D. Catabolism