An ice cube is dropped into a glass of milk at 20°C. Which statement explains the transfer of kinetic energy (KE)?

An ice cube is dropped into a glass of milk at 20°C. Which statement explains the transfer of kinetic energy (KE)?Answer: Because milk has higher...

Brownian motion is not observed in a mixture that includes two phases. Which best identifies the mixture?

Brownian motion is not observed in a mixture that includes two phases. Which best identifies the mixture?Answer: a suspens...

How many atoms of aluminum are present in a sample that has a mass of 155.30 g?

How many atoms of aluminum are present in a sample that has a mass of 155.30 g?Answer: 3.47 x 10...

What is the percent composition of sodium hydrogen carbonate (NaHCO3)?

What is the percent composition of sodium hydrogen carbonate (NaHCO3)?Answer: Na = 27.36%, H = 1.20%, C = 14.30%, O = 57....

If a compound has a molar mass of 180 g/mol and its empirical formula is CH2O, what is its molecular formula?

If a compound has a molar mass of 180 g/mol and its empirical formula is CH2O, what is its molecular formula?Answer: C6H1...

What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?

What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?Answer: 48....

What is the percent by mass of carbon in C10 H14 N2?

What is the percent by mass of carbon in C10 H14 N2?Answer: 74....

A sample of a compound contains 32.0 g C and 8.0 g H. Its molar mass is 30.0 g/mol. What is the compound's molecular formula?

A sample of a compound contains 32.0 g C and 8.0 g H. Its molar mass is 30.0 g/mol. What is the compound's molecular formula?Answer: C...

Halogens tend to gain electrons when they react making them nonmetals. How many electrons do the halogens tend to gain? Why?

Halogens tend to gain electrons when they react making them nonmetals. How many electrons do the halogens tend to gain? Why?Answer: Halogens tend...

Why are most of the elements on the left and in the middle of the periodic table metals?

Why are most of the elements on the left and in the middle of the periodic table metals?Answer: Because most of them have 3 or less valence elec...

How do metals and nonmetals differ in terms of how they lose/gain electrons.

How do metals and nonmetals differ in terms of how they lose/gain electrons.Answer: Metals tend to lose electrons and nonmetals tend to gain ele...

An element has an electron configuration of [Kr]5s24d7. Determine whether this element is a metal or a nonmetal without looking at a periodic table. How can this be determined?

An element has an electron configuration of [Kr]5s24d7. Determine whether this element is a metal or a nonmetal without looking at a periodic table. How...

List three differences between in the physicals properties between metals and nonmetals?

List three differences between in the physicals properties between metals and nonmetals?Answer: Metals are shiny, malleable and good conductors whereas...

What is the equation for reaction between sodium citrate acidic buffer and sodium bicarbonate?

 What is the equation for reaction between sodium citrate acidic buffer and sodium bicarbonate?Answer: Trisodium citrate has a pH of 6.0 whilst...

Are metallic compounds soluble in water?

Are metallic compounds soluble in water?Answer: ...

Do liquid metallic compounds conduct electricity?

Do liquid metallic compounds conduct electricity?Answer: ...

Do solid metallic compounds conduct electricity?

Do solid metallic compounds conduct electricity?Answer: ...

Typical state of metallic compounds at room temp and pressure?

Typical state of metallic compounds at room temp and pressure?Answer: So...

Melting and boiling points of metallic compounds?

Melting and boiling points of metallic compounds?Answer: H...

Are giant covalent structures soluble in water?

Are giant covalent structures soluble in water?Answer: ...

Do solid macromolecular substances conduct electricity?

Do solid macromolecular substances conduct electricity?Answer: No apart from graphite which d...

Typical state of giant covalent compounds at room temp and pressure?

Typical state of giant covalent compounds at room temp and pressure?Answer: So...

Melting and boiling points giant covalent compounds?

Melting and boiling points giant covalent compounds?Answer: H...

Are simple covalent molecules soluble in water?

Are simple covalent molecules soluble in water?Answer: Depends on the polarity of the molec...

Does liquid simple covalent substances conduct electricity?

Does liquid simple covalent substances conduct electricity?Answer: ...

Do solid simple covalent substances conduct electricity?

Do solid simple covalent substances conduct electricity?Answer: ...

Typical state of simple covalent compounds at room temp and pressure?

Typical state of simple covalent compounds at room temp and pressure?Answer: May be solid (I2) but usually liquid or ...

What are the melting and boiling points of simple covalent compounds like?

What are the melting and boiling points of simple covalent compounds like?Answer: ...

Are ionic compounds soluble in water?

Are ionic compounds soluble in water?Answer: ...

Do liquid state ionic compounds conduct electricity?

Do liquid state ionic compounds conduct electricity?Answer: ...

Do solid ionic compounds conduct electricity?

Do solid ionic compounds conduct electricity?Answer: ...

What is the typical state of ionic substances at room temp and pressure?

What is the typical state of ionic substances at room temp and pressure?Answer: So...

What are the melting and boiling points points of ionic substances?

What are the melting and boiling points points of ionic substances?Answer: H...

How do physical properties of a solid depend on the nature of its particles?

How do physical properties of a solid depend on the nature of its particles?The melting and boiling points of a substance are determined by the strength...

Why do simple covalent compounds have relatively low melting and boiling points?

Why do simple covalent compounds have relatively low melting and boiling points?Answer: To melt or boil a simple covalent structure you don't have...

What are the physical properties of gases?

What are the physical properties of gases?Answer: In gases the particles have loads more energy and are much further apart, so the density is pretty...

What are the physical properties of liquids?

What are the physical properties of liquids?A typical liquid has a similar density to a solid and is virtually incompressibleThe particles move about...

What are the physical properties of solids?

What are the physical properties of solids?A solid has its particles very close together giving it a high density and making it incompressibleThe particles...

Why are metals insoluble?

Why are metals insoluble?Answer: Bc of the strength of the metallic bo...

Why are metals good electrical conductors?

Why are metals good electrical conductors?Answer: The delocalised electrons can move and carry cha...

Why are metals good thermal conductors?

Why are metals good thermal conductors?Answer: The delocalised electrons can pass kinetic energy to each ot...

How does the number of delocalized electrons affect the melting point of metals?

How does the number of delocalized electrons affect the melting point of metals?The more delocalised electrons per atom the stronger the bonding will...

Why do metals have high melting and boiling points?

Why do metals have high melting and boiling points?Answer: Strong electrostatic forces of attraction between the positive metal ions and the delocalised...

What are the properties of metals?

What are the properties of metals?High melting pointsGood thermal conductorsGood electrical conductorsInsolu...

What happens in metallic bonding

What happens in metallic bondingThe outermost shell of electrons of a metal atom is delocalised leaving a positive metal ionThe positive metal ions are...

How do metal elements exist?

How do metal elements exist?Answer: As giant metallic lattice structu...

How does hydrogen bonding affect the density of ice?

How does hydrogen bonding affect the density of ice?As liquid water cools to form ice, the molecules make more hydrogen bonds and arrange themselves into...

Why do substances with hydrogen bonding have higher boiling points?

Why do substances with hydrogen bonding have higher boiling points?Answer: Bc of the extra energy needed to break the hydrogen bo...

What causes hydrogen bonding?

What causes hydrogen bonding?Answer: Fluorine, Nitrogen and Oxygen are very electronegative, so they draw bonding electrons away from the hydrogen...

When does hydrogen bonding occur?

When does hydrogen bonding occur?Answer: when there is an H that can bond to N, O, or...

How does the shape of a molecule affect VDW?

How does the shape of a molecule affect VDW?Answer: Long straight molecules can lie closer together than branched ones, and the closer two molecules...

How does size affect the strength of VDW?

How does size affect the strength of VDW?Answer: Larger molecules have larger electron clouds meaning stronger ...

What causes VDW forces?

What causes VDW forces?Electrons in charge clouds are always moving really quickly and at any moment they are more likely to be more to one side of an...

What are VDW forces?

What are VDW forces?Answer: Forces found between all atoms and molecules causing them to be attracted to each ot...

Why are intermolecular forces important?

Why are intermolecular forces important?Answer: They affect the physical properties of a compou...

What are the three types of intermolecular forces?

What are the three types of intermolecular forces?Van der WaalsPermanent dipole-dipoleHydrogen bond...

What forces are there between polar molecules?

What forces are there between polar molecules?Answer: Permanent dipoles which are weak forces of electrostatic attraction between the §+ and §- charges...

Why are symmetrical molecules non-polar?

Why are symmetrical molecules non-polar?Answer: The charges cancel out bc they are opposite each other eg ...

When is a molecule polar?

When is a molecule polar?Answer: When there is an uneven distribution of charge across the whole molecule eg wa...

What is a permanent dipole?

What is a permanent dipole?Answer: A difference in charge between two atoms in a polar bond caused by a shift in electron density in the b...

How does electronegativity affect covalent bonds?

How does electronegativity affect covalent bonds?In a covalent bond between two atoms of different electronegativities, the bonding electrons will be...

What is is electronegativity?

What is is electronegativity?Answer: An atoms ability to attract the electron pair in a covalent b...

Bonding and angles for octahedral?

Bonding and angles for octahedral?6 bonding0 lone90©️9...

Bonding and angles for square pyramidal?

Bonding and angles for square pyramidal?5 bonding1 lone9...

Bonding and angles for trigonal bipyramidal?

Bonding and angles for trigonal bipyramidal?5 bonding0 lone9...

Bonding and angles for square planar?

Bonding and angles for square planar?4 bonding2 lone9...

Bonding and angles for see saw?

Bonding and angles for see saw?4 bonding1 lone102©️8...

Bonding and angles for tetrahedral?

Bonding and angles for tetrahedral?4 bonding0 lone109....

Bonding and angles for T shape?

Bonding and angles for T shape?3 bonding2 lone8...

Bonding and angles for trigonal pyramidal?

Bonding and angles for trigonal pyramidal?3 bonding1 lone10...

Bonding and angles for trigonal planar?

Bonding and angles for trigonal planar?3 bonding0 lone12...

Bonding an angels for bent?

Bonding an angels for bent?2 bonding2 lone104....

Bonding and angles for linear?

Bonding and angles for linear?2 bonding0 lone18...

What are the shapes of molecules?

What are the shapes of molecules?LinearBentTrigonal planarTrigonal pyramidalT shapeTetrahedralSee sawSquare planarTrigonal bipyramidalSquare pyramida...

What is the theory of electron repulsion called

What is the theory of electron repulsion calledAnswer: Valence-Shell Electron-Pair Repulsion The...

What is the order of electron repulsion biggest to smallest?

What is the order of electron repulsion biggest to smallest?Lone pair / Lone pairLone pair / Bonding pairBonding pair / Bonding p...

Why do electron charge clouds repel each other?

Why do electron charge clouds repel each other?Answer: Electrons are all negatively charged so the charge clouds will repel each other as much as...

What is a charge cloud?

What is a charge cloud?Answer: An area where you have a really good chance of finding an electron pair as they don't remain still but move around...

How do electron pairs exist?

How do electron pairs exist?Answer: As charge clo...

What is a dative covalent bond?

What is a dative covalent bond?Answer: In dative covalent, also known as co-ordinate bonding, one atom provides both of the shared electron in the...

Why does diamond refract light?

Why does diamond refract light?Answer: Due to its tetrahed...

Why can't diamond conduct electricity?

Why can't diamond conduct electricity?Answer: All the outer electrons are held in localized bonds so cannot move and carry cha...

Why is diamond a good thermal conductor?

Why is diamond a good thermal conductor?Answer: Vibrations can travel easily through the stiff latt...

Why does diamond have a high melting point?

Why does diamond have a high melting point?Answer: There are strong covalent bonds between atoms that require a lot of energy to overc...

Properties of diamond?

Properties of diamond?Very high melting pointExtremely hardGood thermal conductorCan't conduct electricityInsolubleCan be cut to form gemstones and refract...

What structure is diamond?

What structure is diamond?Answer: Tetrahed...

Why is graphite insoluble?

Why is graphite insoluble?Answer: The covalent bonds in the sheets are too strong to br...

Why does graphite have a high melting point?

Why does graphite have a high melting point?Answer: The strong covalent bonds in the sheets require a lot of energy to overc...

Why does graphite have low density?

Why does graphite have low density?Answer: The layers of hexagons are quite far apart compared to the length of the covalent bo...

Why is graphite an electrical conductor?

Why is graphite an electrical conductor?Answer: It contains delocalised electrons which aren't attached to any particular carbon atom so are free...

Why is graphite a good dry lubricant?

Why is graphite a good dry lubricant?Answer: The weak bonds between sheets of graphite are easily broken allowing them to slide over each ot...

Properties of graphite?

Properties of graphite?good dry lubricantElectrical conductorLow density so makes good sports equipmentHigh melting pointInsolu...

Why do carbon atoms form giant covalent structures?

Why do carbon atoms form giant covalent structures?Answer: Bc each carbon atom can form 4 strong covalent bo...

What are giant covalent structures? (Macromolecular structures)

What are giant covalent structures? (Macromolecular structures)Answer: Huge networks of atoms held together by strong covalent bo...

What holds molecules together?

What holds molecules together?Answer: covalent bo...

Why do ionic compounds tend to dissolve in water?

Why do ionic compounds tend to dissolve in water?Answer: Water molecules are polar so the partially charged poles attract the oppositely charged...

Why do ionic compounds have high melting points?

Why do ionic compounds have high melting points?Answer: Giant ionic lattices are held together by strong forces of electrostatic attraction which...

Why do ionic compounds conduct electricity only when molten or in solution?

Why do ionic compounds conduct electricity only when molten or in solution?The ions in a liquid are free to move and carry chargeIn a solid the ions are...

Three features of ionic compounds?

Three features of ionic compounds?They conduct electricity when molten or dissolved but not when they're solidIonic compound have high melting pointsIonic...

What are ionic crystals?

What are ionic crystals?Answer: Giant lattices of i...

What is the overall charge of a compound?

What is the overall charge of a compound?Answer:&nbs...