question

Relatively slow rates of chemical reation are associated with which of the following?

answer

Strong bonds in reactant molecules

question

Standard enthalpy change for Na2O + H2O= 2NaOH

answer

-150 kJ

question

Planar configuration

answer

BCl3

question

N2 + 3H3= 2NH3

answer

change in G, H, and S are negative

question

change in H for I2 + 3Cl2= 2ICl3

answer

-390 kJ

question

two unshared pairs of electrons on central atom

answer

H2S

question

Molecule with only one double bond

answer

C2H4

question

Molecule with the largest dipole moment

answer

H2O

question

trigonal pyramidal geometry

answer

PH3

question

change in H for 3C2H2= C6H6

answer

-607 kJ

question

most ionic compound

answer

CaCl2

question

NH4SCN

answer

change in G negative, change in H and S positive

question

most positive oxidation number

answer

SO2

question

compound that shows resonance

answer

SO2

question

PF5 does not have

answer

d2sp3 hybridization

question

decrease in entropy

answer

formation of a crystalline solid from a supersaturated solution

question

electrons shared by hydrogen and oxygen

answer

spend more time around oxygen

question

decreasing bond polarity

answer

HF HCl HBr HI HAt

question

most ionic elements

answer

CsF

question

number of structures for NO3-

answer

3

question

molecule that violates octet rule

answer

SF4

question

number of electrons on FCl3

answer

6

question

bond energy for CH4 + 4F2= CF4 + 4HF

answer

-1924 kJ

question

shape of AX5 with one nonbonding pair of electrons

answer

square pyramidal

question

shape of AX3 with two lone pairs of electrons

answer

T-shaped

question

shapes of NH3 and BF3

answer

trigonal pyramidal and trigonal planar

question

molecule that is nonpolar

answer

CF4

question

polar molecule

answer

PCl4F

question

square planar hybridization

answer

sp3d2

question

PCl5 hybridization

answer

sp3d

question

negative change in S

answer

compressing one mole of Ne at constant temperature from .5 to 1.5 atm

question

first law of thermodynamics

answer

energy cannot be created or destroyed but must be conserved

question

second law of thermodynamics

answer

entropy of the universe is increasing

question

specific heat capacity

answer

amount of energy required to raise one gram of a substance one degree Celsius

question

heat released when 9.25 moles of Fe is reacted with oxygen

answer

-3820 kJ

question

change in H for P4O10 + 6PCl5 =10Cl3PO

answer

-610 kJ

question

formula for P2O5

answer

diphosphorus pentoxide

question

kinetic molecular theory does not say

answer

gas particles move at speeds close to the speed of light

question

Cu65 isotope in nature

answer

25%

question

Average atomic or molecular speed closest to N2 molecules at 0 C and 1 Atm

answer

CO

question

greatest density at 0 C and 1 Atm

answer

Xe

question

Values that decrease when ideal gas is cooled by 25 degrees

answer

average distance between molecules and average speed of molecules

question

percent of CaCO3 by mass in limestone

answer

35%

question

safest and most effective way to treat an acid splash on skin

answer

flush affected area with water and then with a dilute NaHCO3

question

moles of HI needed to produce 2.5 moles of I2

answer

5

question

why does water boil at a lower temperature on a mountain

answer

equilibrium water vapor pressure equal the atmospheric pressure at a lower temperature

question

partial pressures of gasses

answer

He less than Ne less than Ar

question

gas that deviates most form ideal behavior

answer

SO2

question

the a coefficient in van der Waals equation

answer

forces of attraction between molecules

question

how many protons, neutrons, and electrons are in Sr-90

answer

38, 52, 38

question

Quantum numbers of ground-state gallium

answer

4,1,1,1/2

question

pauli exclusion principle

answer

indicates that an atomic orbital can hold no more than two electrons

question

dissolves in water to form a colorless solution

answer

ZnCl2

question

not true about halogens

answer

iodine liberates free bromine from a solution of bromide ion

question

barium sulfate is least soluble in a .01 molar solution of what

answer

Al2(SO4)3

question

what color is the flame when a solution of sodium chloride is vaporized in a flame

answer

yellow

question

use of a visible-light spectrophotometer

answer

determining the concentration of a solution of Cu(NO3)2

question

based on ionization energies in chart, element X is what

answer

Al

question

what happens to atomic radius as atomic number increases from 11-17

answer

decreases

question

Rutherford's gold atom experiment

answer

neutrons are at the center of an atom

question

yellow precipitate forms when NaI is added to what

answer

Pb

question

not soluble in water but soluble in dilute hydrochloric acid

answer

Mg(OH)2

question

what will separate Pb from other ions

answer

dilute HCl solution

question

contains exactly two unpaired electrons

answer

S

question

contains only one electron in the highest occupied energy sublevel

answer

Ga

question

purple in aqueous solution

answer

KMnO4

question

white and soluble in water

answer

KCl

question

isoelectronic elements

answer

Mg, Ca, Sr

question

greatest percentage of which compound can be recovered by cooling a saturated solution of that compound from 90 degrees C to 30 C

answer

KNO3

question

which property decreases across the periodic table form sodium to chlorine

answer

atomic radius

question

why is there a different nuclear charge on Na and Ne

answer

Na has a higher neutron-to-proton ratio than Ne

question

sodium chloride is least soluble in what

answer

CCl4

question

all halogens are

answer

diatomic

question

least soluble in water

answer

BaCO3

question

with chart, which ions could be present in solution at a concentration of .1 M

answer

Na

question

what pure white crystalline solid dissolves in water to yeild a base and liberate gas when acid is added to it

answer

K2CO3

question

mixture is made by adding AgNO3 to Na2CrO4, what does it look like

answer

yellow before, red precipitate

question

precipitate made when AgNO3 is added to Na2CrO4

answer

Ag2CrO4

question

compare Cl zero and Cl negative

answer

Cl zero atom contains fewer electrons than the Cl negative ion

question

increasing atomic radius

answer

Na, K, Rb

question

quantum numbers for 3d^4

answer

3,2,-1,1/2

question

greatest difference between its first and second ionization energies

answer

potassium

question

frequency of blue light

answer

7.5 times 10 to the 14

question

wavelength of sodium light

answer

5.9 times 10 to the -7

question

energy of photon of red light

answer

2.84 times 10 to the -19

question

ionic equation for NaCl +AgNO3= NaNO3+ AgCl

answer

Ag + Cl= AgCl

question

insoluble in water

answer

CaCO3

question

soluble in water

answer

K2S

question

precipitate formed from ammonium phosphate and calcium sulfate

answer

Ca3(PO4)2

question

orbital designation for an electron with n=4 and L=3

answer

4f

question

electron configuration that isn't possible

answer

1s^2 2s^2 2p^6 3s^3 3p^4

question

not possible configuration for an atom in excited state

answer

1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2

question

increasing atomic size

answer

Br, As, V, Sc, K

question

electron affinity equation

answer

atom + electron= ion

question

metallic elements

answer

low ionization energies

question

formula for Hg2Cl2

answer

mercury 1 chloride

question

not a correct formula

answer

KCr2O7

question

sulfate polyatomic ion

answer

SO4 negative 2

question

empirical formula of CH2 and mass of 83.5 what is molecular formula

answer

C6H12

question

empirical formula for compound made of carbon and hydrogen that is 14.3% H

answer

CH2

question

gram molar mass of Al(NO3)3

answer

213

question

2 L container will hold 4g of what

answer

CO2

question

8g of N2H4 and 92g of N2O2 mixed, how much H2O is made

answer

9 grams

question

propane burns in excess oxygen, what is coefficient of O2

answer

7

question

volume of H2 when excess Mg is added to .4 M HCl

answer

448 mL

question

volume of O2 required to react with excess CS2 to make 4 L of CO2

answer

12 L

question

mass of CuSO4 with water required to make .1 M copper sulfate

answer

6.2 grams

question

compound with 1.1 mole of K, .55 moles of Te and 1.65 moles of O

answer

K2TeO3

question

partial pressure of SO2 in flask

answer

160 mmHg

question

greatest rate of effusion through pinhole

answer

Ne

question

mass ratio of chromium to oxygen closest to 1.6 to 1

answer

CrO2

question

pressure of gas at 27 C

answer

.6 Atm

question

change the boiling point of a liquid

answer

smaller container, more moles, higher altitude

question

info needed to calculate molarity

answer

molar mass of sucrose

question

formula for hydrocarbon with 1.88 density

answer

CH2

question

with info, density of sample is

answer

2 grams per cm

question

what gas effuses at half rate of NH3

answer

Cl2

question

mass of Au made when .05 moles of Au2S3 is reduced with excess H2

answer

19.7 grams

question

coefficient of O2 for C10H12O4S +O2= CO2 + H2O

answer

12

question

what happens to gas in tank when more oxygen is added

answer

volume of gas increases

question

empirical formula for 62.2% Hf and 37.4% Cl

answer

HfCl3

question

pressure of flask of NH4NO3 at 400 K

answer

1 Atm

question

percent water in hydrate Na2Co3 times 10H2O

answer

63%

question

height of column of water of barometer

answer

33.9

question

object moves from moon to Earth

answer

mass will stay same and weight will increase

question

formula for Hydrogen arsenide

answer

H3As

question

when real gas is most like ideal gas

answer

low pressure and high temperature

question

ideal gases

answer

have no volume or attractive forces between them

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