Laser_3

Which of the following statements about the stereochemistry of electrophilic addition of HX to ...

Which of the following statements about the stereochemistry of electrophilic addition of HX to ...

Which of the following statements about the stereochemistry of electrophilic addition of HX to alkenes is true?
 
  A. Achiral starting materials yield an unequal mixture of two enantiomers.
 
  B. Hydrohalogenation occurs with

Stringfield73   80   1 Reply

na.ov

Calcium hydride ( ) reacts with water to form hydrogen gas:

Calcium hydride ( ) reacts with water to form hydrogen gas:

Calcium hydride ( ) reacts with water to form hydrogen gas:

CaH2(s) + 2 H2O(l)    Ca(OH)2(aq) + 2 H2(g)

How many grams of   are needed to generate 45.0 L of   gas at a pressure of 0.888 atm and a temperature of 32C?
A) 47.5 g
B) 0.798 g
C) 134 g
D

alexweebz   80   1 Reply

anaseem

Which of the following is TRUE if Esys = -100 J?

Which of the following is TRUE if Esys = -100 J?

Which of the following is TRUE if Esys = -100 J?
A) The system is gaining 100 J, while the surroundings are losing 100 J.
B) The system is losing 100 J, while the surroundings are gaining 100 J.
C) Both the system and the surroundings are gaining 100

AutoPenalti   80   1 Reply

julieglossbrenn

Which of the following visible colors of light has the highest frequency?

Which of the following visible colors of light has the highest frequency?

Which of the following visible colors of light has the highest frequency?
A) green
B) red
C) blue
D) yellow
E) orange

dukedan01   80   2 Replies

Samantha Wernik

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.
A) Al3O2
B) Al2O3
C) AlO2
D) Al2O
E) AlO

yaciel143@yahoo   80   1 Reply

Calyboo

List the most electronegative atom.

List the most electronegative atom.

List the most electronegative atom.

Barbmat   80   2 Replies

Samantha Bland

Draw the Lewis structure for the acetate ion, CH3CO2, including any important resonance structures. ...

Draw the Lewis structure for the acetate ion, CH3CO2, including any important resonance structures. ...

Draw the Lewis structure for the acetate ion, CH3CO2, including any important resonance structures.  Label each atom with its formal charge.

Gunveen   80   1 Reply

tehreem 968

On a phase diagram, the sublimation curve is between

On a phase diagram, the sublimation curve is between

On a phase diagram, the sublimation curve is between
A) a solid and a gas.
B) a solid and a liquid.
C) a liquid and a gas.
D) two solids.
E) two liquids.

goldensteeez   80   1 Reply

Charline091486

Biological catalysts that increase the rates of biochemical reactions are known as

Biological catalysts that increase the rates of biochemical reactions are known as

Biological catalysts that increase the rates of biochemical reactions are known as
A) substrates.
B) inhibitors.
C) enzymes.
D) binders.
E) trumanettes.

Enni Cortu   80   1 Reply

ZanLau

The ________ Law of Thermodynamics states that for any spontaneous reaction, the entropy of the ...

The ________ Law of Thermodynamics states that for any spontaneous reaction, the entropy of the ...

The ________ Law of Thermodynamics states that for any spontaneous reaction, the entropy of the universe increases.
A) Zero
B) First
C) Second
D) Third
E) Fourth

orengo   80   1 Reply

momo6534

A galvanic cell consists of a Ni2+/Ni half-cell and a standard hydrogen electrode. If the Ni2+/Ni ...

A galvanic cell consists of a Ni2+/Ni half-cell and a standard hydrogen electrode. If the Ni2+/Ni ...

A galvanic cell consists of a Ni2+/Ni half-cell and a standard hydrogen electrode. If the Ni2+/Ni half-cell standard cell functions as the anode, and the standard cell potential is 0.26 V, what is the standard reduction potential for the Ni2+/Ni half

AkuAku   80   1 Reply

RichardSoags

Give the highest oxidation number of chromium.

Give the highest oxidation number of chromium.

Give the highest oxidation number of chromium.
A) -3
B) +8
C) +5
D) +7
E) +6

Imbajade   80   1 Reply

Carinasp

Explain how EDTA is used to treat lead poisoning.

Explain how EDTA is used to treat lead poisoning.

Explain how EDTA is used to treat lead poisoning.

Laura0624   80   1 Reply

Ajumper1

Write a nuclear equation to describe the neutron induced fission of Pu to form Kr and Ce. Determine ...

Write a nuclear equation to describe the neutron induced fission of Pu to form Kr and Ce. Determine ...

[html]Write a nuclear equation to describe the neutron induced fission of

jacobysmith   80   1 Reply

muchkinnn

Identify the missing particle in the following nuclear equation: U Sr + ? + 2 n + 4 g

Identify the missing particle in the following nuclear equation: U Sr + ? + 2 n + 4 g

[html]Identify the missing particle in the following nuclear equation:

 

dominicklacasse   80   1 Reply

kristen_m17

Draw a correct Lewis structure for tert-butyl alcohol, (CH3)3COH, including all non-bonding lone pairs.

Draw a correct Lewis structure for tert-butyl alcohol, (CH3)3COH, including all non-bonding lone pairs.

Draw a correct Lewis structure for tert-butyl alcohol, (CH3)3COH, including all non-bonding lone pairs.

thall031   80   1 Reply

steski89

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

AutoPenalti   80   1 Reply

mtv12

What intermolecular attractions exist in a pure sample of methylthiol, CH3SH?

What intermolecular attractions exist in a pure sample of methylthiol, CH3SH?

What intermolecular attractions exist in a pure sample of methylthiol, CH3SH?

tthomp96   80   1 Reply

kristen_m17

Provide a Fischer projection of (2S,3S,4S)-2,3,4-trichloroheptane.

Provide a Fischer projection of (2S,3S,4S)-2,3,4-trichloroheptane.

Provide a Fischer projection of (2S,3S,4S)-2,3,4-trichloroheptane.

QueenPinky   80   1 Reply

epapenfus

Provide the structure of the product which results when the alkene below is treated with O3 followed ...

Provide the structure of the product which results when the alkene below is treated with O3 followed ...

[html]Provide the structure of the product which results when the alkene below is treated with O3 followed by (CH3)2S.

James89   80   1 Reply

JennMMiller22

Which of the following compounds is (are) appropriate to promote the cationic polymerization of isobutylene?

Which of the following compounds is (are) appropriate to promote the cationic polymerization of isobutylene?

[html]Which of the following compounds is (are) appropriate to promote the cationic polymerization of isobutylene?

• ROOR

• NaOH

• H2SO4

• BF

Havakajs   80   2 Replies

Havakajs

Provide the reagents necessary to accomplish the following transformation.2-methyl-2-octene to ...

Provide the reagents necessary to accomplish the following transformation.2-methyl-2-octene to ...

Provide the reagents necessary to accomplish the following transformation.

2-methyl-2-octene to 2-methyloctan-3-ol

rossn   80   2 Replies

rossn

Which of the following compounds has carbon in the highest oxidation state?

Which of the following compounds has carbon in the highest oxidation state?

[html]Which of the following compounds has carbon in the highest oxidation state?

• CH3CH2OH

• CH3C(OCH

loweba1   80   2 Replies

loweba1

Which has the higher boiling point, diethyl ether or butan-1-ol? Briefly explain.

Which has the higher boiling point, diethyl ether or butan-1-ol? Briefly explain.

Which has the higher boiling point, diethyl ether or butan-1-ol? Briefly explain.

dukedan01   80   1 Reply

ninim2998

What group of lipids are esters of long-chain fatty acids and long-chain alcohols?

What group of lipids are esters of long-chain fatty acids and long-chain alcohols?

What group of lipids are esters of long-chain fatty acids and long-chain alcohols?

loweba1   80   1 Reply

gsmith9495

Dissolved oxygen level in neutral water

Dissolved oxygen level in neutral water

 A water chemist obtained a 250-mL sample from a nearby lake and fixed the oxygen on-site with alkaline solutions of MnSO4 and KI-NaN3. Returning to the laboratory, a 200-mL sample was analyzed by acidifying the sample with conc H2SO4 and then titrat

chemistry prob   80   1 Reply

bio_man

Which drawing represents a bonding molecular orbital for a homonuclear diatomic molecule?

Which drawing represents a bonding molecular orbital for a homonuclear diatomic molecule?

[html]Which drawing represents a σ bonding molecular orbital for a homonuclear diatomic molecule?

▸

jus10n   80   3 Replies

qwer34

Consider the galvanic cell shown below. Identify the anode and cathode, and indicate the direction ...

Consider the galvanic cell shown below. Identify the anode and cathode, and indicate the direction ...

[html]Consider the galvanic cell shown below.

Izzydhindsa   80   3 Replies

DryPhantom

When lead(II) oxide, PbO, is converted to lead metal, the lead is reduced.

When lead(II) oxide, PbO, is converted to lead metal, the lead is reduced.

When lead(II) oxide, PbO, is converted to lead metal, the lead is reduced.

▸ true

▸ false

iloveyofacexx3   80   1 Reply

Lori734

A laser used in laser pointers has a wavelength of 405 nm. What is the energy of this light in joules?

A laser used in laser pointers has a wavelength of 405 nm. What is the energy of this light in joules?

[html]A laser used in laser pointers has a wavele

nwill1104   80   1 Reply

3289u3902u398

Consider the following portion of the energy-level diagram for hydrogen:n = 4-0.1361 10-18 Jn = ...

Consider the following portion of the energy-level diagram for hydrogen:n = 4-0.1361 10-18 Jn = ...

[html]Consider the following portion of the energy-level diagram for hydrogen:

Jakeshmitty   80   1 Reply

lexiwelk

In which group do all the elements have the same number of valence electrons?

In which group do all the elements have the same number of valence electrons?

[html]In which group do all the elements have the same number of valence electrons?


▸

Vivi1   80   1 Reply

treaton.mitchel

The four lines observed in the visible emission spectrum of hydrogen tell us that:

The four lines observed in the visible emission spectrum of hydrogen tell us that:

[html]The four lines observed in the visible emission spectrum of hydrogen tell us that:


▸ The hydrogen molecules they came from have the formula H4.

▸ We could observe more lines if we had a stronger prism.

andro   80   1 Reply

Clint the Flint

In the molecule XeF2, how many pairs of electrons surround Xe and what is the molecular structure?

In the molecule XeF2, how many pairs of electrons surround Xe and what is the molecular structure?

[html]In the molecule XeF2, how many pairs of electrons surround Xe and what is the molecular structure?


▸

domo2292   80   1 Reply

Butterflyxo98

When potassium carbonate, K2CO3(s), dissolves in water, for each formula unit that dissolves, the ...

When potassium carbonate, K2CO3(s), dissolves in water, for each formula unit that dissolves, the ...

[html]When potassium carbonate, K2CO

wtobi0411   80   1 Reply

pauldarkmage

A sample of oxygen gas has a volume of 3.00 L at 27C and 800.0 torr. How many oxygen molecules does ...

A sample of oxygen gas has a volume of 3.00 L at 27C and 800.0 torr. How many oxygen molecules does ...

[html]A sample of oxygen gas has a volume of 3.00 L at 27°C and 800.0 torr. How many oxygen molecules does it contain?


▸

jcp_03   80   1 Reply

stephbro

Consider three 1-L flasks at STP. Flask A contains NH3 gas, flask B contains NO2 gas, and flask C ...

Consider three 1-L flasks at STP. Flask A contains NH3 gas, flask B contains NO2 gas, and flask C ...

[html]Consider three 1-L flasks at STP. Flask A contains NH3 gas, flask B contains NO2 gas, and flask C contains N2 g

Jeremysex   80   1 Reply

CBGCandra7

The pressure inside a flask is 1.25 atm. Convert this pressure to torr.

The pressure inside a flask is 1.25 atm. Convert this pressure to torr.

[html]The pressure inside a flask is 1.25 atm. Convert

cpa0511   80   1 Reply

toria3

The lattice energy of CsCl is 657.0 kJ/mol and its heat of solution is 17.8 kJ/mol. Calculate the ...

The lattice energy of CsCl is 657.0 kJ/mol and its heat of solution is 17.8 kJ/mol. Calculate the ...

[html]The lattice energy of CsCl is 657.0 kJ/mol and its heat of solution is 17.8 kJ/mol. Calculate the hydration of energy of CsCl(s).


▸ 35.6 kJ/mol

▸ –674.8 kJ/mol

▸ –639.2 kJ/mol

▸

lolbroek   80   1 Reply

!K!

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated ...

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated ...

[html]Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.

HamidTaher   80   1 Reply

NathanBeller