For each statement check if it describes ionic, polar covalent, nonpolar covalent, or metallic bonds: Ionic Polar Covalent Nonpolar Covalent Metallic A transfer of electrons between two atoms Positive nuclei dispersed in a sea of mobile electrons Metals and nonmetals bonding One atom loses, and another atom gains electrons Two atoms share electrons equally Metals bonding only Electronegativity differences under 0.4 A bond resulting from electrostatic charges between opposite charged particles Two atoms share electrons unequally Nonmetals bonding only Electronegativity differences over 0.4 and between 2 Non metals

Explanation:

Ionic bond: it is formed through electrostatic attraction between a cation(metal) and an anion(non metal).In other words, an ionic bond is formed when a metal loses an electron and a non metal gains it. If the electronegativity difference is more than 1.7,the bond will exhibit an ionic characteristic.

Covalent bond: this type of bonding exists between non metals. It involves sharing of electron between two non metals.

Metallic bond: is formed between positively charged atoms, where free electrons are shared among lattice of cations.It is mostly formed between metal atoms.

Polar covalent bond:  it is a type of covalent bond formed due to unequal sharing of electrons between two atoms. This is mainly due to the fact that one element will have a stronger attraction for electrons than the other. If the electronegativety difference is between 0.4 and 1.7, the bond will be a polar covalent.

Non polar covalent: it is a type of covalent bond formed due to equal sharing of electrons between two atoms.Thus the electronegativity difference would be less than 0.4

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g