Laser_3

For the reaction: 2 N2O5(g) 4 NO2(g) + O2(g) the rate law is: = k[N2O5] At 300 K, the half-life is ...

For the reaction: 2 N2O5(g) 4 NO2(g) + O2(g) the rate law is: = k[N2O5] At 300 K, the half-life is ...

[html]For the reaction: 2 N2O5(g) → 4 NO2(g) + O2(g) the rate law is:

adb005   151   3 Replies

dravid11

For PbCl2 (Ksp = 2.4 104), will a precipitate of PbCl2 form when 0.10 L of 3.0 102 M Pb(NO3)2 is ...

For PbCl2 (Ksp = 2.4 104), will a precipitate of PbCl2 form when 0.10 L of 3.0 102 M Pb(NO3)2 is ...

[html]For PbCl2 (Ksp = 2.4 × 10–4), will a precipitate of PbCl2 form when 0.10 L of 3.0 × 10–2 M Pb(NO3)2 is added to 400 mL of 9.0 × 10–2 M NaCl?

▸ Yes, because

NeuroJuice   142   3 Replies

okayman

a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution..

a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution..

...which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10.

A. Assuming that the hydroxide is 1.0 x 10^-2 M, calculate the concentration of Fe2+ ions in the solution.

B. A battery is prepared using th

1234

freddy0622   8178   45 Replies

thing2857

If the pressure of 125 cm3 of nitrogen gas at 100 °C decreases from 885 torr to

If the pressure of 125 cm3 of nitrogen gas at 100 °C decreases from 885 torr to

If the pressure of 125 cm3 of nitrogen gas at 100 °C decreases from 885 torr to 225torr, what is the final volume? Assume temperature remains constant.
A) 0.318 cm3
B) 4.92 cm3
C) 31.8 cm3
D) 492 cm3
E) 4590 cm3

OldSpice   1127   4 Replies

Anonymous

Three techniques used to concentrate ores are flotation, ferromagnetic separation, and amalgamation.

Three techniques used to concentrate ores are flotation, ferromagnetic separation, and amalgamation.

[html]Three techniques used to concentrate ores are  flotation,  ferromagnetic separation, and  amalgam

ssi15   93   1 Reply

manuella14

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

[html]Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

jack bopp   173   1 Reply

sbe0921

In a compound, the oxidation number of an alkali metal is always +1.

In a compound, the oxidation number of an alkali metal is always +1.

[html]In a compound, the oxidation number of an alkali metal is always +1.

▸ true

▸ false[/h

bmwprincess   137   1 Reply

cheezeh3ad

Group 1 elements are called alkaline earth metals.

Group 1 elements are called alkaline earth metals.

Group 1 elements are called alkaline earth metals.

▸ true

▸ false

briemert2013   120   1 Reply

onid

Elements in a group exhibit different properties.

Elements in a group exhibit different properties.

Elements in a group exhibit different properties.

▸ true

▸ false

blinkrb   121   1 Reply

Dratini

Cast iron as it is prepared in a blast furnace is a product of high purity.

Cast iron as it is prepared in a blast furnace is a product of high purity.

[html]Cast iron as it is prepared in a blast furnace is a product of high purity.

▸ tr

SirJohnny   154   1 Reply

eap8

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Beryllium, the first element in Group 2A, is the most metallic element in the group.

[html]Beryllium, the first element in Group 2A, is the most metallic element in the group.

▸

Jgal   130   1 Reply

OCboba

Bauxite (Al2O3 2H2O) ore is the commercial source of aluminum metal.

Bauxite (Al2O3 2H2O) ore is the commercial source of aluminum metal.

[html]Bauxite (Al2O3 • 2H2O) ore is the commercial source of aluminum metal.

omaralnatour   100   1 Reply

jmoline2

Aluminum chloride exist as a dimer.

Aluminum chloride exist as a dimer.

Aluminum chloride exist as a dimer.

▸ true

▸ false

karotop02   110   1 Reply

jarste123

Alkali metals are the most electronegative metals in the periodic table.

Alkali metals are the most electronegative metals in the periodic table.

[html]Alkali metals are the most electronegative metals in the periodic table.

▸ true

▸ fals

FallenOne   110   1 Reply

crusherpsg

Al(OH)3, Be(OH)2, and water are all amphoteric.

Al(OH)3, Be(OH)2, and water are all amphoteric.

[html]Al(OH)3, Be(OH)2, and water are all amphoteric.

▸ true

▸ false[/

cyberk   91   1 Reply

mr.pogi

A metal crystal consisting of 1 1020 atoms has 0.5 1020 bonding orbitals and 0.5 1020 antibonding ...

A metal crystal consisting of 1 1020 atoms has 0.5 1020 bonding orbitals and 0.5 1020 antibonding ...

[html]A metal crystal consisting of 1 × 1020 atoms has 0.5 × 1020 bonding orbit

duo21   76   1 Reply

chemcal

A fractional distillation method called the Mond process is used to purify nickel.

A fractional distillation method called the Mond process is used to purify nickel.

[html]A fractional distillation method called the Mond process is used to purify nickel.

▸ tr

RHCP12   85   1 Reply

ramos1992

Which undergoes electrolysis to form calcium metal?

Which undergoes electrolysis to form calcium metal?

[html]Which undergoes electrolysis to form calcium metal?

▸ Ca(OH)2

▸ Ca(NO

theroyalty   79   1 Reply

bcyber

Which two compounds are produced by the Solvay process?

Which two compounds are produced by the Solvay process?

[html]Which two compounds are produced by the Solvay process?

▸ CaCO3 and CaO

▸

Heybonita   102   1 Reply

julie5

Which statement is correct?

Which statement is correct?

[html]Which statement is correct?

▸ A. magnesium hydroxide can act as an acid.

▸ B

devildoc   61   1 Reply

ydnam23

Which statement is not correct?

Which statement is not correct?

[html]Which statement is  not correct?

▸ Aluminum has a low density versus other metal

shahabkhon   62   1 Reply

avi420

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

[html]Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Krazil   103   1 Reply

kpot15

Which one of these normally would not be obtained by chemical reduction?

Which one of these normally would not be obtained by chemical reduction?

[html]Which one of these normally would  not be obtained by chemical reduction?

▸ Fe

jwalker824   75   1 Reply

doquangnhat

Which one of these elements would give a p-type semiconductor when added to a silicon crystal?

Which one of these elements would give a p-type semiconductor when added to a silicon crystal?

[html]Which one of these elements would give a  p-type semiconductor when added to a silicon crystal?

dalvirb   108   1 Reply

BlondieX

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

[html]Which of these reactions represents the removal of silica from iron ore in a blast furnace?

sunnisam   138   1 Reply

clarkh7839

Which of these ions is most likely to substitute for Ca2+ in the human body?

Which of these ions is most likely to substitute for Ca2+ in the human body?

[html]Which of these ions is most likely to substitute for Ca2+ in the human body?

berry   95   1 Reply

JRAD814

Which of these elements when doped into silicon would give an n-type semiconductor?

Which of these elements when doped into silicon would give an n-type semiconductor?

[html]Which of these elements when doped into silicon would give an  n-type semiconductor?

hcraik2   87   1 Reply

diana72g

Which mineral is a silicate?

Which mineral is a silicate?

[html]Which mineral is a silicate?

▸ cinnabar

▸ corundum

▸ smithsonite

▸ hydroxyapatite

▸

cng   122   1 Reply

Jsimon

Which mineral is not a silicate?

Which mineral is not a silicate?

[html]Which mineral is  not a silicate?

▸ zircon

▸ beryl

▸ smithsonite

▸ albite

▸

ttools   122   1 Reply

shindh02

Which mineral is not a carbonate?

Which mineral is not a carbonate?

[html]Which mineral is  not a carbonate?

▸ witherite

▸ sylvite

▸ smithsonite

▸ c

teranine   98   1 Reply

jennaforiero

Which mineral contains calcium as a major element?

Which mineral contains calcium as a major element?

[html]Which mineral contains calcium as a major element?

▸ cinnabar

▸ corundum

▸ hematite

linyuki   96   1 Reply

david200095367

Which metal's commercial source is seawater?

Which metal's commercial source is seawater?

Which metal's commercial source is seawater?

▸ Cs

▸ K

▸ Mg

▸ Ba

▸ Li

rbayla   67   1 Reply

hhorton

Which is the principal reducing agent in a blast furnace?

Which is the principal reducing agent in a blast furnace?

[html]Which is the principal reducing agent in a blast furnace?

▸ CaO(s)

▸

jshayneo   92   1 Reply

vlad8919

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

[html]Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

hardy7luver   135   1 Reply

yoyoguy

Which is an example of a basic oxide?

Which is an example of a basic oxide?

[html]Which is an example of a  basic oxide?

▸ SO3(g)

▸ B

janeniz   74   1 Reply

okayman

Which is a covalent oxide?

Which is a covalent oxide?

[html]Which is a covalent oxide?

▸ CaO

▸ Na2O

▸ Li2O

▸

Bluffinmuffin   99   1 Reply

olskee

Which ion is not found in sea water in a concentration high enough to be an industrial source of the ...

Which ion is not found in sea water in a concentration high enough to be an industrial source of the ...

[html]Which ion is  not found in sea water in a concentration high enough to be an industrial source of the metal

helpmeplease1   126   1 Reply

olsondi

Where on the periodic table are the most reactive metals located?

Where on the periodic table are the most reactive metals located?

[html]Where on the periodic table are the most reactive metals located?

▸ group I (alkali met

JZ240   92   1 Reply

mr.pogi

When mercury combines with other metals, what is the name given to the species formed?

When mercury combines with other metals, what is the name given to the species formed?

[html]When mercury combines with other metals, what is the name given to the species formed?

nrod1120   85   1 Reply

doublekud

What is the source of most metals?

What is the source of most metals?

[html]What is the source of most metals?

▸ industry

▸ synthesis

▸ saturated

▸ ocean floor

tsk   98   1 Reply

obedbro