1EXAM- HChem Flashcards by Alex Cepo

What is the N, A, and S number of H2O2?

20, 14, 6

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What is the N, A, and S number of SO3?

32, 24, 8

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What is the N, A, and S number of BCl3?

30, 34, 6

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Name this compound: HCl

Hydrochloric Acid

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Name this compound: CuCl2

Copper (II) Chloride

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Name this compound: CO

Carbon Monoxide

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Name this compound: HClO4(aq)

Perchloric Acid

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Name this compound: SiBr4

Silicon Tetrabromide

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Write the formula for this compound: Tin (II) fluoride

SnF2

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Write the formula for this compound: Hydroiodic Acid

HI(aq)

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Write the formula for this compound: diphosphorus pentoxide

P2O5

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How many atoms are in 4.0 x 10^-5 g of aluminum?

8.9 x 10^17

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What is the molar mass of (NH4)3PO4?

149.0 g/mol

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How many hydrogen atoms are in one molecule of (NH4)2PO4?

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What is the percent composition of hydrogen in water?

11%

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What is the percent nitrogen (by mass) in (NH4)2CO3?

29.2%

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What is the molar mass of CO2?

44.0 amu

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What is the molar mass of NaOCl?

74.5 amu

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What is the molar mass of Ca(OH)2?

74.1 amu

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Find the percent composition of each element in he compound: H2SO4

H = 2.0%, S = 32.7%, O = 65.2%

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Find the percent composition of each element in he compound: CO2

C = 27.3%, O = 72.7%

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Find the percent composition of each element in he compound: Al2S3

Al = 35.9%, S = 64.1%

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Copper has two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu. Copper-65 is 30.83% abundant and it has a mass of 64.9278 amu. What is the weighted average mass of the two isotopes?

63.55 amu

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The identity of an atom is determined by the number of

Protons

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The number of protons and neutrons combined is the

Atomic mass

Isotopes have the same number of _____, but a different number of ______

Protons, neutrons

The number of protons is called the

Atomic number

Janet, how do you spell the element F?

Fluorine

What's the symbol for tin

What's the symbol for silver

What's the symbol for strontium

What's the symbol for iron

What element is Cd

Cadmium

What element is V

Vanadium

What element is Y?

Yttrium

What do all nickel atoms have in common?

The same atomic number

How is the charge of an ion determined?

If the number of electrons is greater or lesser than the protons?

In a nuclide symbol, of he mass number and atomic number, which is on top and which is on the bottom?

The mass number is on the top and the atomic number is on the bottom

Is length an intensive or extensive property?

Extensive

Is hardness an intensive or extensive property?

Intensive

Give some examples of intensive properties, and then extensive

I - density, malleable, boing point | E - length, volume, mass

Give some examples of physical properties

Ductile, conductive, malleable

Is age extensive or intensive? Gender.

Extensive, intensive

Chemical or physical change? Lighting a match

Chemical or physical change? Making paper from wood

Chemical or physical change? Frying an egg

Chemical or physical change? Boiling water to make Mac n Cheese

Chemical or physical change? Making chex mix

Pure substance or mixture? Purified air

Pure substance or mixture? Element or compound?Sucrose

PS, compound

Homogenous or Heterogenous? Wood

Heterogenous

Homogenous or Heterogenous? Milk

Homogenous

Homogenous or Heterogenous? Dirt

Heterogenous

Homogenous or Heterogenous? Black coffee

Homogenous

How many significant figures? 0.000983

How many significant figures? 6.023 x 10^23

How many significant figures? 2.0 x 10^-3

How many significant figures? 3.456110

How many significant figures? 12700.00

How many significant figures? 12,700

What wavelength corresponds to a frequency of 6.25 x 10^9 Hz?

.0480 m

What is the correct electron configuration for nitrogen?

1s2, 2s2, 2p3

Write the long form electron configuration for potassium

1s2, 2s2, 2p6, 3s2, 3p6, 4s1

What is the frequency for a wavelength of 440 nm?

6.8 x 10^14 Hz

What is empirical form

The simplest reduced form

What is molecular form

The actual number of atoms in a compound

What type of acid do you write "hydro" at the beginning of the name?

Binary acids

What type of compound name do you use prefixes in?

Covalent

How do you identify an oxyacid?

They will be made of three elements: H, O, and a third element

What must an element be to be a binary or oxyacid?

(aq)

In oxyacids, what means 1 extra O? 1 less? 2 less?

per + stem + ic, stem + ous, hypo + stem + ous

What are the type 2?

"d-block", tin, lead

What must any acid begin with?

Prefix for 7?

Hepta

Prefix for 4?

Tetra

How many dots can be on a side in an electron dot diagram?

What is the bond hybridization of a water molecule?

sp3

What word describes how electrons are involved in ionic bonding?

Transferred

Draw some lewis structures, determine if they are polar, classify them, tell the bond hybridization

Can't really put that in notecards

What are the three types of bonding between molecules?

Hydrogen bonding, dipole-dipole, vanderwaals

What type of bonding do all molecules have?

Vanderwaals

How do you determine a polar molecule?

One or more line pairs on the central atom, different atoms connected to the central atom

Study periodic table trends

They are probably way better to study visually anyway

Classify the bond: Na — Cl

Ionic

Classify the bond: Cu — O

Polar covalent

Classify the bond: Cs — F

Ionic

Classify the bond: Cl — Cl

Pure covalent

C = ?

2.998 x 10^8 m/s

H = ?

6.626 x 10^-34 J • s

Atoms release energy when they jump to higher energy levels, true or false?

True

Electrons give off energy in finite amounts called

Quantums

Sublevels are divided into

Orbitals

Each orbital can hold up to ____ electrons

Electrons give off energy in the form of a _____ when returning to the ground state

Photon

What scientist proposed the idea that electrons travel in fixed paths?

Bohr

When an electron moves to the ground state, energy is ______

Absorbed

No two electrons can have the same four quantum numbers. True or false?

True

What does the primary quantum number tell you?

What energy level the electron is in

Why do electrons move?

To achieve stability

Half filled orbitals are more stable than partially filled, T or F?

True

Know crest, trough, wavelength, and amplitude

🍕

Amplitude establishes ________ | Wavelength establishes __________

Intensity of shade, color

Light travels on ______ waves

Transverse

OIL RIG means what

Oxidation Is Loss, Reduction Is Gain

If an element has three letters it is

Man made