ICP 1 Moles and Molar Mass & Types of Reactions
Given the atomic weights of carbon, 12.01; hydrogen, 1.01; and oxygen, 16.0, what is the molar mass of glucose (C[sub 6]H[sub12]O[sub 6])?
180.18 grams
If the atomic weight of nitrogen is 14.0, what is the mass of one mole of nitrogen gas (N[sub 2])?
28.0 g
If the mass of one mole of hydrogen is 1.01 grams; phosphorus, 30.97 grams; and oxygen, 16.0 grams, what is the molar mass of phosphoric acid (H[sub 3]PO[sub 4])?
98.0 grams
When magnesium combines with sulfur to form magnesium sulfide, it is oxidized to Mg^2+. Which statement is true about this reaction?
it involves loss of electrons
Which of these is always equal to the molar mass of any element?
its atomic weight
If chlorine gas is bubbled through an aqueous solution of sodium iodide, the result is elemental iodine and aqueous sodium chloride solution. What kind of reaction took place?
single-replacement
What do a mole of magnesium (Mg) and a mole of iron (Fe) have in common?
their number of atoms
Iron (Fe) reacts with copper sulfate (CuSO[sub 4]) to form iron (II) sulfate. In this reaction, Cu^2+ gains electrons to form Cu. Which statement is true about this reaction? Fe(s) + CuSO[sub 4](aq) + FeSO[sub 4](aq) + Cu(s)
Cu undergoes reduction.
What type of reaction is depicted by this equation? MgO(s) + H[sub 2]O(l) + Mg(OH)[sub 2](aq)
combination
What type of reaction is depicted by this equation? 2C[sub 4]H[sub 10](g) + 13O[sub 2](g) --> 8CO[sub 2](g) + 10H[sub 2]O(g)
combustion