A 0.455 g sample of magnesium is allowed to burn in 2.315 g of oxygen gas. The sole product is magnesiumoxide. After the reaction, no magnesium remains and the mass of unreacted oxygen is 2.015 g. What mass ofmagnesium oxide is produced?

Q: Give a reason why hydrogen might be placed along with the group 1A elements of the periodic table.

A: Periodic table gives the information of chemical elements arranged according to atomic number,…

Q: The majority of known noble gas compounds are those of Xenon. Why?

A: SOLUTION: Step 1: Generally noble gases have fulfilled electronic configuration and they are very…

Q: Cesium has 1 valence electron. How many possible bonds can be formed and why?

A: Given Cesium has 1 valence electron. Cesium is an alkali metal. Its atomic number is 55.

Q: Write the balanced chemical equation for the reaction of solid strontium with iodine gas.

A:

Q: Some properties of element Y are listed. It reacts with hydrochloric acid to make hydrogen gas. It…

A: 1. Mg +2HCl  → MgCl2  + H2 2. Mg  + H2O → MgO + H2 Magnesium burns in steam to produce white…

Q: Write the balanced chemical equation for the reaction of solid potassium with liquid water?

A: Given: Reaction of solid potassium with liquid water.

Q: Name one metalloid in period 4 and one non-metal in period 5:

A: The metalloid in period 4 is ,        Germanium  (Ge)       Arsenic (As)

Q: How can you explain the reactivities of halogens?

A: Interpretation - The reactivities of halogens are to be explained.

Q: A hypothetical element A has these properties: first ionization energy= 850 kJ/mol second…

A: In the question given, that third Ionisation energy of element A is exceptionally very high as…

Q: 2. The elements vary from metals through metalloids to nonmetals. They form halides in oxidation…

A: Given, The elements of the unknown group contains metals, metalloids and non metals. The halides of…

Q: Is astatine a nonmetal metal or metalloid

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Q: When a nonmetal oxide reacts with water, it forms an oxoacid with the same oxidation number as the…

A: Hi, since you have posted questions that has multiple subparts. We will answer the first three…

Q: Consider the elements in Column 15 in the periodic table, with nitrogen at the top (2nd period) and…

A: The elements of group 15 generally dissolve and do not react with water. However there are some…

Q: When a nonmetal oxide reacts with water, it forms anoxoacid with the same nonmetal oxidation state.…

A: Since there are multiple sub-parts in the question , only the first 3 sub-parts of the question are…

Q: A sample of cesium metal reacted completely with water, evolving 2.028 mmol of dry H 2 at 19 degrees…

A:

Q: onsider two different elements, element 1 and element 2. Element 1 has a larger radius, but a…

A: Atomic radius is the shortest distance between the nuclei of the atom to the outermost  shell of…

Q: Differentiate between metal and non-metal on the basis of their chemical properties.

A: Metals are lustrous and opaque elements which are good conductor of heat as well as electricity. And…

Q: The element E reacts with F to form an ionic compound EF. The element forms a solid ionic hydride…

A: Ionic compound : It is the compound formed between two atoms having large difference in their…

Q: What are the compouds formed by the elements of Group VIIA and VIIB?

A: The elements in the periodic table are arranged in the increasing order of their atomic numbers.…

Q: Which of the following elements would you expect to be most similar: nitrogen, chlorine, barium,…

A: Elements belonging to the same group in the periodic table display similar properties.

Q: Write the balanced chemical equation for the reaction of solid lithium with liquid water?

A: Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen. The…

Q: Which equation correctly represents the first ionization of calcium? Ca (g) – Ca (g) + e O Ca" (g) →…

A: First ionization energy - The energy needed to remove the outermost,  or highest energy,  electron…

Q: What are alkali and transition metals? Give three similarities between Alkali Metals and Transition…

A: Alkali metals are elements that belongs to group 1. Transition metals are elements are located in…

Q: Using its electron configuration, explain why antimony can form 3+ or 5+ cations.

A: Atomic number of antimony (Sb) = 51  So, it has total 51 electrons

Q: In what ways do Argon, Neon, and Krypton react the same as each other and in what ways do they react…

A: Argon, Neon, and Krypton are all noble gases, which means they are highly stable and generally do…

Q: Arrange these elements according to atomic radius. Largest to smallest. Be C Ne O N B F Li

A: Given elements: Be, C, Ne, O, N, B, F, Li. We have to arrange them according to the largest to…

Q: Classify each element as a metal, a semimetal, or a nonmetal.    Ga, Ge, Sc, S, Sb, Bi,Se

A:

Q: Which of the following elements would you expect to have chemical properties most similar to those…

A: on the basis of the periodic table, we can say that the elements that belong to the same group have…

Q: Describes the differences and similarities between solids, liquids and gases on a molecular level…

A: Solid - - > The substances which are having very high intermolecular forces between thier…

Q: The first ionization energy of sodium is 496 kJ/mol. Use Coulomb’s law to estimate the average…

A:

Q: Which of the following elements would you expect to have similar properties? As Te Ar Sn He

A: The element present in the same group of the periodic table has the same chemical properties. The…

Q: Consider two different elements, element 1 and element 2. Element 1 has both a smaller radius and a…

A: Atomic radius is the distance measured from one nucleus center of one circle to another nucleus…

Q: Describe alkali metals?

A: The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (okay),…

Q: III. For each of the following questions, consider your knowledge of periodic trends and the table…

A:

Q: Which of the following elements would you expect to have properties similar to those of barium (Ba)?…

A: Which of the given element would have a similar properties like Barium (Ba) = ?