4. When elements combine to form compounds: EXPLAIN ANSWER
A). Their properties do not change
B). Their properties change completely
C). Their properties are completely random
D). Their properties are an average of all elements in the compound
E). None of the above
B) Their properties change completely
when elements combine to form compounds, their individual properties are lost.
4. When elements combine to form compounds: EXPLAIN ANSWER A). Their properties do not change B)....
When elements combine to form compounds, those compounds have the properties that are completely differnet from those of the elementos from which they were made. (TRUE OR FALSE)
Do elements always combine in the same proportions by mass when they form a given compound?
7. Two elements, chocolatonium (Ch) and aprilium (Ap), combine to form several compounds. Two of these are ChAp2 and ChaAps. A sample of ChaAps contains 275 g Ch and 433 g Ap. a. Find the relative mass of Ch to Ap in Ch2Aps. b. Find the relative mass of Ch to Ap in Ch2Aps if the mass of Ap is exactly 45 amu. c. How many grams of Ch can combine with 126 g Ap in ChaAps using the new...
Name: Naming Molecular Compounds 1. Nitrogen and oxygen combine to form many different compounds. How would you name find the formula each of the following according to the IUPAC rules: a. N20 (laughing gas) b. NO (a cellular signaling molecule) c. NO2 (a toxic brown gas) d. diphosphorus pentoxide (used to speed up certain chemical reactions) 4. Concept check: Each of the following compounds is incorrectly named. What is wrong with each name and what is the correct name for...
Lattice energy is _______. a.) the energy given off when gaseous ions combine to form one mole of an ionic solid b.) the energy required to convert a mole of ionic solid into its constituent ions in the gas phase c.) the sum of ionization energies of the components in an ionic solid d.) the sum of electron affinities of the components in an ionic solid e.) the energy required to produce one mole of an ionic compound from its...
The ionization energy of Group 2 elements decrease and the radii decrease down the group. Therefore a. The metals are less easily oxidized down the group b. The metals are more easily oxidized down the group c. Redox properties do not change systematically down the group Which Group 2 element DOES NOT form ionic hydrides? a. Ca b. Sr e. Be What is the pH of a saturated solution of Ca(OH)? The solubility of Ca(OH) is 2.1x10-3M a. 11.02 b....
Answer the following question as "every time, never or
occasionally" true. Explain your answer.
A) Compounds with alkynes have a signal above 3000 cm-1 B) Compounds consisting alcohol have broad signal representing O-H (stretch), signal above 3000 cm-1 C) Compound with NH2 (bend) signal above 3000 cm-1 D) Compound with alkenes have C=C (stretch) signal between 1600 and 1700 cm-1 E) Ethers do not have a noticeable signal for C-O (stretch)cause the ether functional group is non-polar
Both please
15) Jslig your understandng ot honvions combine to form lonic compounds, which one of the following is a correct formula unit? a. KBrs b. Ba2Se c. Ca202 d. MgOH e. Al(OH)3 16) What is the correct formula for Titanium (IV) Sulfite? a. Ti(S04)2 b. Ti(SO3)2 c. Ti4(S03) d. Tiz(S04)4 e. Tisz
Which of the following elements can form compounds with an expanded octet? C F As Li All of the above elements can form compounds with an expanded octet. What is the molar mass of oxygen gas? 1.20 × 1023 g/mol 32.0 g/mol 6.02 × 1023 g/mol 16.0 g/mol How many lone pairs of electrons are on the As atom in AsF3? How many lone pairs of electrons are on the As atom in AsF3? 0 1 2 3 What is...
Elements which are most likely to form an ionic compound if they are allowed to react with each other are A. Nonmetal and nonmetal B. Metal and a metal C. Metal and Nonmetal D. None of the above