I'm taking a practice test and I'm having some trouble and was hoping you could help. This is not graded I just need helpSee attached: Question 28Which of these is the correct name for MgCl2?Magnesium chlorideO Magnesium chlorineO Magnesium dichlorideO Magnesium monochlorideO Monomagnesium monochlorideQuestion 29How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene according to the given equation?2 C2H2 + 5 O2(g)→4 CO2+2 H2OO 2,030 gramsO 814 gramsO 651.2 gramsO 88.0 gramsO 37.0 grams

The name of an ionic compound is written as follows: First, write the name of the cation, if the cation shows a variable oxidation number then we also write the oxidation number of the cation in the bracket. Then write the name of the anion, the number of cation, and the anion will not be indicated in the name.MgCl2 is an ionic compound and the cation is Mg2+ and the anion is Cl- (chloride ions). The cation does not show the variable oxidation number, hence there is no need to indicate the oxidation number of the cation in the name of the compound. Hence the name of the compound is = magnesium chloride The right option is as follows: Magnesium chlorideAcetylene reacts with oxygen to form carbon dioxide and water. The equation for the balanced chemical reaction is as follows: 2C2H2 + 5O2 → 4CO2 + 2H2O The moles of oxygen reacted is = 18.5 moles The mass of carbon dioxide formed in grams is =?According to the stoichiometry of the reaction, we can say that: 5 mole of O2 forms = 4 mole of CO25 mole of O2 forms = 4 mole×44 gmole of CO21 mole of O2 forms = 4 mole×44 g5 mole of CO218.5 mole of O2 forms = 4 mole×44 g5 mole×18.5 of CO218.5 mole of O2 forms = 651.2 g of CO2The right option is as follows: 651.2 g