chemistry! URGENT

60,827 results, page 85

Chemistry

What effect does diluting the sodium hydroxide have on the basicity of the solution?

Chemistry

How do I the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissovled?

chemistry

What is the main reason so many different molecules are made from carbon atoms?

Chemistry

How would you find the mass in grams of the following 4.01*10^23 atoms Ca, 40.08 g/mol

Chemistry

I need help balancing this equation. NaOH + HSO4 ====== Na2SO4 + H20

Chemistry

How many moles is each of the following? 15.5 g SiO(subscript 2) 0.00688 g AgCl 79.3 g Cl (s.s. 2) 5.96 g KOH

chemistry

Convert 385 mmHg into kPa and atms. What does this mean?

Chemistry

What would increase the pressure inside a tank of helium gas?

ap chemistry

give a scientific reason for why perspiring is a mechanism for cooling the body

Chemistry

A gas initially at 20C must be changed to ? C to triple the pressure.

chemistry

A gas initially at 30C must be changed to ? C to triple the pressure.

Chemistry

A gas initially at 20 C must be changed to ____ C to triple the pressure.

chemistry

what is the mass in grams of one molecule of ethanoic acid CH3COOH?

Chemistry

can the energy originally stored in gasoline be traced to rotating wheels?

chemistry

can someone explain electrolysis of water using a hoffman apartatus to me?

Chemistry

can the energy originally stored in gasoline be traced to rotating wheels?

chemistry

please help me. write the following in names:- CaHCO3 H2SO4 CaCl2

chemistry

Among water, ethanol and isopropanol, which has the largest molar mass.

chemistry

If the reaction is zero order, how long would it take for I2 disappear?

chemistry

name an isomer of pentane (that is not cyclic)and write down its structure

chemistry

Among water, ethanol and isopropanol, Which has the largest molar mass.

chemistry

Does the element sodium have properties in common with NaCl? Explain

Chemistry

IS glass etching by Hydrofluoric acid a physical or chemical change? Thanks you

Physics/chemistry

Describe the partcle Theory of a HOt air Balloon?

chemistry

How can you differentiate between the solid and the gas states at the molecular level?

Chemistry

How can you differentiate between the solid and the gas states at the molecular level?

Chemistry

Can someone help me balance this equation ZnCl2 + (NH4)2S ------- NH4Cl + ZnS

chemistry

What is the mass of hydrogen produced from the reaction of 2.31 grams of HCl with magnesium?

chemistry

If the molecular speed of a gas increases, its rate of diffusion will__________.

chemistry

Which must be a mixture of substances? a- Solid b- Liquid c- Gas d- Solution

Chemistry

What is the final product of citric acid combined with sodium hydroxide

chemistry

Determine the percentage composition of each of the following compounds a) NaCl b) AgNO3 c) Mg(OH)2

chemistry

What mass in grams of potassium hydroxide is cntained in 500 mL of solution that has a pH of 11.5?

chemistry

why do some M&M dye's travel farther than others when placed in water?

chemistry

What is the maximum amount (in grams) of CO2 that can be obtained from 454g of Fe2O3?

Chemistry

How do you calculate the pH, pOH, [H3O] and [OH] for a 0.067 M solution of sodium iodate

chemistry

In 2 - 3 scentences, please write how electrochemistry is involved in preventing corrosion. Thank you

chemistry

Enter the oxidation number with the sign above each element H2 OH^- Mg^2+ CO3^2-

chemistry

The atomic masses of elements are generally not whole numbers. Explain why.

Chemistry

The molecular structure around the oxygen in water is _________ I don't know what to put

Chemistry ? help!

How do I perform the following conversions of pressure units: 168 torr = What?

chemistry

What functional group(s) must be present in a monomer of a condensation reaction?

chemistry

What functional group(s) must be present in a monomer of a condensation reaction?

chemistry

sir i didn't understand the first i made it more detailed for u though ty

Chemistry

Manganese has the oxidation number of +5 in ______ . . (A) [MnF6]3– (C) [MnO4]2– (B) Mn2O7 (D) [Mn(CN)6]–

chemistry

What is the bond order of OH- and OH+? I tried to solve it but couldn't so Im about to give up. Help me please.

chemistry

My best answer would be: HCl]4[O2] / [H2O]2[Cl2]2 Is this correct?

chemistry

Why can two different elements have similar atomic masses?

chemistry

where on the periodic table are most natural radioactive nuclides located?

chemistry

So if there is Ag2CrO4, the metal wire, in a SCE and Hg2Cl2 which will be the anode and cathode?

chemistry

how do you draw a calomel electrode. Does it require two or one cells?

chemistry boiiii

to find the number of moles is it... mole=mass/grams

organic chemistry

what's the relative cost of petrochemicals to the materials they have replaced??

Organic chemistry

How many stereogenic carbon atoms does the alkaloid morphine have?

organic chemistry

How many stereogenic carbon atoms does the alkaloid morphine have?

chemistry

If K = 1.8 x 10 for HC H O (aq) „\ H (aq) + C H O (aq), and 100 mL of aqueous solution has [HC H O ] = 0.50 M, [H ] = 0.090 M, and [C H O ] 0.0010 M, is the system at equilibrium?

Chemistry

im curious if i post my work on here will anyone check it for me to see if it is right?

chemistry

Calculate the number of english tons(2000 lb per ton) in 6.03 lb

chemistry

f the pressure of 2 L of a gas at STP doubles, the new volume would be

chemistry

Why do gases deviate from ideal behavior at very high pressures

chemistry

what change occurs when sucrose solution is heated?Give evidence.

CHEMISTRY

WHAT WOULD BEST TO MEASURE 18ML OF ETHYL ALCOHOL ACCURATELY

Chemistry

Why isn't hydrochloric acid used to both dissolve and precipitate silver?

Chemistry 101

How many kg of chlorine are in 23kg of each of the following? CFCl_3 C2F3Cl3 CF3Cl

Chemistry

Given that for ethanoic acid pKa=4.75, calculate the pH of sodium ethanoate 0.1M.

CHEMISTRY

CALCULATE THE FORMULA UNITS IN 285G OF IRON (111)PHOSPHATE?

Chemistry

What is the net ionic equation for.... 1 Ca(NO3)2 + 1 K2CO3 ==> 1 CaCO3 + 2 KNO3

Chemistry

An object has a mass of 128g and a volume of 27cm3. Find the density.

chemistry

Rank the following from Longest to Shortest bond length: i) H-F ii) As-As iii) NC iv) O=O v) Cl-Cl

Ap Chemistry- Organic

How does polairty of isopropyl alcohol differ from polarity of water?

chemistry

can nuclear chemists convert elements into unstable ones? If so how?

Chemistry

How is the temperature change in an alcohol related to how storng the intermolecular forces are?

Chemistry

a bottle of a soft drink looks pure, but it is not, how could you demonstrate that it is a mixture? thanks

chemistry

Which of the following is an acidic oxide? a. ) NO2 b. ) H2O c. ) K2O d. ) NaCl e. ) Ca(OH)2

chemistry

All gases are in soluble in water.Whether it is ture or false

chemistry

What is the chemical composition of ozone, carbon dioxide, salt and water

11th grade chemistry

whats the ionic name for strontium iodide

chemistry home work

2 examples on sediment plz reply fast...

chemistry

How many moles of gas does it take to occupy 120L at 2.3atm and 340K

chemistry

Why is water a liquid but carbon dioxide a gas at room temperature.

Chemistry

If you add hydrochloric acid (HCl) to magnesium (Mg) metal, what will you observe?

Chemistry

What is the group 3A element that forms the most basic oxide? I thought it was TI, why isn't it? thanks

chemistry

What is formed when Na2S is added to a beaker containing amonnia solution?

Chemistry

why do we use different instrument to make absorbance and fluorescence measurments?

chemistry

what 3 groups do scientists put elements into in the periodic table?

Chemistry

What would happen if you mixed sugar and sulferic acid together?

Chemistry

If I was to react a borax solution with a sulphuric acid to neutralise it, what products will I get?

chemistry

Calculate the number of C, H, and O atoms in 4.50 g of glucose (C6H12O6), a sugar. help please?

chemistry

What happens in terms of energy and stability when a covalent bond forms?

chemistry

what is the electron configuration of a calcium atom whose atomic number is 20

Chemistry -- plz help

how do i calculate the percentage of ionic character .. ex. H-O = electronegativity difference = 1.2

chemistry

What mass of iron contains the same number of atoms as 70.05 g of nitrogen?

chemistry

where would you find silicon dioxide outside a chemitry lab?

chemistry

where would you find silicon dioxide outside a chemitry lab?

chemistry

how do i draw lewis structures for: CH2Cl2, CH3OH and NH3 .. plz help

chemistry

how many electrons are shared by two atoms that form a triple bond?

Bobpursley+Chemistry

Hey Can you take a look at my previous post that you replied on.

college Chemistry

Ok this is the question... Complete the combustion of butane... CH3CH2CH2CH3 + O2 ====> ____________

chemistry

how do i balance Cu+O2 arrow(i don't know how to make one)CuO. And what is the reaction type.

chemistry

What is the relationship between the molar mass of Ne, Ar, Kr, and Xe and the melting points of their solids?

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