Hi,I am doing a practice test and need to check my answers. All of this is for Chem 101 Please see attached: **Question 39**Which statement about ionic compounds is **incorrect**?- Ionic compounds include table salt, calcium carbonate, and sodium bicarbonate.- Ionic solids dissolved in water dissociate to form ions.- Ionic bonds are formed between metals and nonmetals.- Ionic bonds involve the sharing of electrons by metals and nonmetals.- Ionic compounds are held together by the attraction between positive and negative ions.**Question 40**How many grams of water are produced when 10.0 grams of O₂ react with excess H₂?\[ 2 \, \text{H}_2 + \text{O}_2(\text{g}) \rightarrow 2 \, \text{H}_2\text{O} \]- 11.25 grams- 20 grams- 46 grams- 180 grams- 360 grams**Question 41**In the following equation, what is the coefficient of oxygen (O₂) when the equation is balanced?\[ \_\_\_ \, \text{C}_3\text{H}_8 + \_\_\_ \, \text{O}_2 \rightarrow \_\_\_ \, \text{CO}_2 + \_\_\_ \, \text{H}_2\text{O} \]- 2- 3- 4- 5- 10**Question 42**Which of these does **not** form a negative ion in an ionic compound?- Br- N- Se- I- Al

39. Ionic compounds are those compounds which are formed by transfer of electrons i.e between the metal and non-metal while covalent bonds are formed by sharing of electrons. Ex of ionic compounds are Nacl(salt),calcium carbonate etc. Nacl formation- No.of electron in Na= 11 No.of electron in cl = 17 Here transfer of electron take place between Na(metal) and Cl(non metal). Na loses 1 electron to form Na+ion and Cl gains 1 electron to form Cl- and forms Nacl.the ionic compounds are held together by these positive and negative ions.So the incorrect statement about ionic compound is Ionic bonds involve the sharing of electrons by metals and nonmetals.As per barlteyby guidelines i answered only first question so please don't mind. Thank you.