Chem Final

___HCl + ___CaCO3 → ___CaCl2 + ___H2O + ___CO2

When you have an upset stomach and you take an antacid, this unbalanced reaction occurs. What set of coefficients will balance this equation?

• 2,3,3,1,3

• 1,1,1,1,1

• 2,2,2,1,3

• 2,1,1,1,1

Fe2O3 + 3CO → 2Fe + 3CO2

One of the reactions in a blast furnace used to reduce iron is shown above. How many grams of Fe2O3 are required to produce 15.5 g of Fe if the reaction occurs in the presence of excess CO?

• 11.1 g

• 22.1 g

• 44.2 g

• 30.0 g

Nitrogen has (a) _ _ _ _ _ _ _ _ _ _ valence electrons, which means it has ​ (b) _ _ _ _ _ _ _ _ _ _ bonding places to make covalent bonds with other nonmetals

Red cabbage is an organic indicator for acids and bases. In the pictures above, assess which test tube(s) may have ammonia dissolved in it and justify the choice.

• Ammonia may be in one of the test tubes on the left since the pH of ammonia is below 7.

• Ammonia could be in the middle or the right test tubes since it is a weak to moderate base.

• Ammonia is probably in the middle since it is naturally a gas and will evaporate off leaving a neutral solution with pH = 7.

• Ammonia could be in a couple of the test tubes on the right since it is a acid.

Ionic bonds are formed by transferring an electron from a ​​ (a) _ _ _ _ _ _ _ _ _ _ to a ​ nonmetal.

Calcium Chloride can be represented by the chemical formula

• CaCl₂

• Ca₂Cl

• CaCl

• Ca₂Cl₂

Identify the type of chemical reaction (a) _ _ _ _ _ _ _ _ _ _

What is the electron configuration of Calcium (Ca)?

• 1s²2s²2p⁶3s²3p⁶4s¹

• 1s²2s²2p⁶3s²3p⁶

• 1s²2s²2p⁶3s²3p⁶3s¹4s²

• 1s²2s²2p⁶3s²3p⁶4s²

Using only the information available in the periodic table, consider the elements potassium and bromine. From their location on the periodic table, identify the oxidation state and number of valence electrons for potassium and bromine. Then use this information to describe their reactivity. Which statement most accurately describes the compound formed by potassium and bromine?Potassium and bromide share electrons to form a covalent compound called potassium dibromide (KBr2).

• Potassium and bromide share electrons to form a covalent compound called potassium dibromide (KBr₂).

• Potassium and bromide form an ionic compound called potassium bromide (K₂Br).

• Potassium and bromide share electrons to form a covalent compound called potassium monobromide (KBr).

• Potassium and bromide share electrons to form a covalent compound called potassium monobromide (KBr).

What is a key difference between ionic and covalent bonds?

• Ionic bonds occur only in organic compounds, while covalent bonds occur in inorganic compounds.

• Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

• Ionic bonds involve the sharing of electrons, while covalent bonds involve the transfer of electrons.

• Covalent bonds can only form between two metals, while ionic bonds can form between a metal and a nonmetal.