chemistry! URGENT

59,905 results, page 85

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?

chemistry

If a satellite orbits the earth at a velocity of 3.2 x 10⁶ km/hr, this would be the same as how many ft/s?

Chemistry

Suppose we want to know whether on mixing h2o2 with fe+2,the oxidation of fe+2 to fe+3 will take place or not.

chemistry

symbol used in a chemical equation to indicate the phrase with react with?

Chemistry

Is rate of evaporation directly or inversely related to molecular weight

Chemistry

A scientist has 0.46mL of a solution. How would she convert this volume to microliters?

chemistry

how many grams of solid NaOH are required to prepare 200 ml of a .05 M solution?

chemistry

how many milliliters of 5M NaCl are required to prepare 1500 ml of .002M solution?

organic chemistry

what is the first and second step in a alkene halogenation reaction

Chemistry

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

Chemistry

What are some advantages of using nuclear power as a source of electricity?

Chemistry

Are these compounds organic, if not what are they? Kmno4 CH3OH C6H6 PdC12 CH3CO2H

Chemistry

Why is the benzene molecule represented as " a flat cyclohexane with a ring inside?"

CHemistry

Why do cis and trans isomeric compounds exhibit different properties?

Chemistry

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

Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?

Chemistry

Why does the simplest ketone have three carbon atoms and no fewer?

Chemistry

Name the following: CH3CH2CH(OH)COOH CH3OCH2CH2CH3 C4H9O(C=O)CH3

Chemistry

What would be the molality of a solution made up of 75cm^3 of water and 0.21 g of NaCl?

Chemistry

How do you determine the number of moles in 78.6 grams of carbon tetrachloride (CCl4) ?

Chemistry

In paper chromatography, why must the starting line be drawn with pencil? Thanks!

chemistry

would the method of spectrophotometry or redox titration be a more accurate?

intro chemistry

can someone help me find out what CH3OCH2CH2CH3 is and what it does. Is it an alkane aldehyde or etc. thanks

chemistry

why do you think the statue of liberty was made of copper instead of zinc

chemistry

why do lemon juice keeps apple slices from turning brown? thanks.

Organic Chemistry

How many peaks would be expected in the 1H NMR spectrum for mesitylene? A. 2 B. 6 C. 3 D. 12 E. 9

Organic Chemistry

Which of the following would have the lowest stretching frequency A. C=C B. C-O C. C=O D. N=O E. C-H

Chemistry

Why are alloys used to make coins rather than the pure metal?

****CHEMISTRY****

Can you see the particles in a coloid, suspension, and solution? Can any of those be filtered?

Chemistry

How can Ammonia be a base since it lakes a hydroxide ion? thank you so much

Chemistry-help-thanks

Ethanol is an organic solvent. In general, will it dissolve ionic compounds?

Chemistry

Calculate the solubility of silver chloride in a solution that is 0.140 M in NH3.

Inorganic chemistry

What change in coulombs, is required to deposit 0.301 g Cu(s) from a solution of Cu^2+(aq)

Chemistry

Oxidation Numbers AlH(SO4)3 and the overall charge is -2 BaCr2O7

chemistry

If a block of wood with the length 1.05 m, height 5.24 cm, and width 3.36 cm and a mass of 2.56 kg what is the density?

Chemistry

Determine the correct oxidation number assigned to carbon in CaCO3

Chemistry

What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?

chemistry

How do you balance this redox rxn? Al + HNO3 ----> Al(NO3)3 + NH4NO3 +H2O

Chemistry

How many kilojoules are required to change 85g of water at 25 C to steam at 100 C?

science/chemistry

what is the basic physical principle that chromatography is based upon?

science/chemistry

what is the basic physical principle that chromatography is based upon?

chemistry

what is the net ionic equation for calcuim chloride + sodium carbonate

chemistry!

how could i use 13Cn.m.r spectroscopy to distinguish between the ketone and the alcohol?

chemistry

What is the pH of the solution created by combining 2.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HC2H3O2(aq)? I got 1.3. is that correct?

Chemistry

Use the drawing of MO energy diagram for CO to predict the bond order.

Chemistry

What is the balanced chemical equation for neutraling chlorine with sodium thiosulfate

chemistry help asap

explain how paper chromatography separates the components in a solution

chemistry

what mass of AgNO3 can be dissolved in 250 grams of water at 20 degrees C?

Chemistry

Can you tell me what the empirical formulas are for C2H6O4 N2O5 Hg2Cl2 C6H12 Thank you!

Chemistry

WHat is the bond identified as if two covantley bonded atoms are identical?

chemistry

Is it possible for hydrated sodium carbonate to continue to absorb water?

chemistry

Why must a balanced chemical equation be used when determining Keq?

chemistry

whats the correct formula for 1. rubidium selenide 2. potassium phosphate

chemistry

your experiment yielded 50kg of NaCl (D= 4.5g/ml. What volume of your yield is this in liters?

chemistry

balance this stoichiometric equation: SO2 + CaCO3 + O2 ------> CaSO4 + CO2

Chemistry

Calculate the Ph of an aqueous solution that is 3.00% KOH, by mass, and has a density of 1.0242 g/ml.

chemistry

Which type of fat is easier to break down, saturated or unsaturated? Why?

chemistry

in column chromatography in general do polar or nopolar elute first

chemistry

What does it mean when the sulfuric acid is written ABOVE the arrow in a reaction?

Chemistry

For how long should you boil the water in the flask during your experiment?

Chemistry

What gas has the greatest "lifting power" in lighter than air balloons?

Chemistry II

Is iodine (I2) more soluble in water or carbon disulfide (CS2)? Why?

Chemistry

How do you figure out how to express the mass of the electron to significant figures?

college

here is a chemistry 10 quetion. Convert 35.2mL to hm to third power

ap chemistry

give an example of an organic compund made from inorganic substances

Chemistry

How would you calculate the number of atoms for 1.004 mol bismuth

Chemistry 151

How much oxygen is required to completely react with 10 g of C4H10?

chemistry

What volume (in mL) of the base will react completely with 30.00 mL of 0.550 M HCl? 0.0500 M Ba(OH)2

chemistry

all metric units of length are based on multiples of _________

chemistry 12th grade

can carboxyl groups undergo controlled oxidation...why or why not??? thanks

Chemistry

I needed what Cr the metal is soluble and insoluble in and inks was supposed to be links.

Chemistry

Name the following: CH3CH2Ch(OH)COOH CH3OCH2CH2CH3 C4H90(C=O)CH3

organic chemistry

what is the purpose of a hot filtration? when is it necessary to preform one?

Chemistry

Does Sodium and potassium react with steam? Or is the reaction too violent to speak of?

chemistry

I wanted to know that in a chemical reaction are the products part of the system or surrounding?

Math/chemistry

how do I solve this equation? 106 g * 4.184 * (X-23 degrees celsius)

chemistry

What is similar about the outer shell of electrons in the halogen family?

chemistry

What mass of copper, contains the same number of atoms as 50.0 g of silicon?

Chemistry

a sample of C3H8O that contains 200 molecules contain how many atoms?

Chemistry

In the compound PtCl2(NH3)2, what is the percentage of the mass due to nitrogen?

Chemistry

Which of the following is most likely to LOSE electrons when forming an ion? a. F b. P c. S d. Rh e. Se

chemistry-atom

why does splitting a nucleus create a tremendous amount of energy?

chemistry

What is the most common structural feature of chiral organic molecule?

Chemistry

Complete and balance the following equation? __P4O6+__H2O -> ___________

Chemistry

How can you determine which acid solutions (all at 0.10 M) has the highest concentration of anions?

chemistry

What factors affect the rate of diffusion of one gas through another

chemistry

what is the relationship between the area a force is applied to and the resulting pressure?

chemistry

how are the absolute temperature and volume of a gas at constant pressure related?

chemistry

how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution

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