chemistry! URGENT

60,378 results, page 97

Chemistry

How many years will it take for 88g tritium to decay to an 11g sample?

Chemistry 12

Calculate the mass of K2CRO4 needed to make 3.00 L of a 0.0200 M solution.

Chemistry

Is boron trichloride a Giant covalent or Simple molecular substance?

chemistry

What mass of oxygen is needed for the complete combustion of 5.00×10−3g of methane?

chemistry -lab

what would be the percent yield if 2.2 grams of aspirin is formed?

chemistry

What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2

AP Chemistry

write an oxidation- reduction reaction for the reactants OCl- and S2O3-2

Chemistry

How many grams of NaCl are contained in 500ml of normal saline solution which is 0.85%(w/v).

chemistry

HI(aq)+KOH(aq)→H2O(l)+KI(aq) express this as a complete ionic equation

chemistry

How do you draw the structure of the reaction of 1-hexene with h2o in the presence of acid

chemistry

What is formed when zinc carbonate reacts with concentrated hydrochloric acid?

Chemistry

How could 2 molecular compounds react to create a precipitate and an aqueous solution?

Chemistry

Which of the following groups are indicative of anionic polymerization? a)F b)Cl c)COOCH3 d)H e)CH2CH3

CHEMISTRY BALANCING CHEMICAL EQUATION

H2SO4 + NaOC = Na2SO4 + H2O

Chemistry

I do not understand why this cannot go to equilibrium? Na2CO3(aq)+HCl(aq)->H2O(l)+CO2(g)+NaCl(aq)

Chemistry (DrBob222)

Is the relationship between delta G and Temperature inverse or direct?

Chemistry

What is [H+], [OH-], pH, and pOH for a 0.048mol/L solution of the weak benzoic acid, C6H5COOH?

chemistry

How can you convert the number of atoms of these isotopes 35Cl and 37Cl to percentage?

chemistry

how many grams of chromium are required to react with 125 mL of 0.75M CuSO4?

chemistry

What is the symbol equation of iron nails with copper sulfate solution.

Chemistry

A sample of NH3 gas occupies 75.0 liters at STP. How many molecules is this?

Chemistry

What would be the temperature change if 3.0g of water absorbed 15J of heat?

chemistry

if a coin with 3.0 cm diameter, 0.2 cm thickness weighs 10.377g, what are its volume and density?

chemistry

calculate the percentages by mass of the component element in sodium trioxonitrate(v)

Chemistry

What volume of oxygen at 25 degrees celsius and 93.5 kPa will use up 57.1 g of butane?

chemistry

3H2+N2=2NH3 if 2.70 g of H2 reacts with jugful of N ,how many grams of NH3 is formed?

chemistry

how many grams of sodium oxalate, Na2C2O4, could be obtained from 213 g of C6H6?

analytical chemistry

How much NaOH (in grams) would there be in 0.25 litre of a 0.3M solution?

Chemistry

write a sentence for the following reaction PCl5(s)=PCl3(s)+Cl2(g)

chemistry

What is the molality of a solution composed of 28.4 g of methanol CH3OH and 250 g of water

Chemistry

How do I calculate moles from the given litres and mass of the substance (in grams)?

Chemistry

How do I calculate moles from the given litres and mass of the substance (in grams)?

Chemistry

The Maximum number of electrons that may occupy the third electron shell is A)2 B)8 C)10 D) 18

Chemistry

What atom is indicated by the following electron configuration. 1s^22s^12p^1 ?

Chemistry

Calculate [OH−] for 1.90mL of 0.190M NaOH diluted to 1.50L .

Chemistry

A solution has 189 grams of HNO3 dissolved in 1000L of water. What is pH?

Chemistry

How has crude oil changes the country (positive and negative points)

Chemistry

What would be the volume of 5.0 moles of gas at STP? Can you explain how to do it please?

chemistry

what volume of 1.5mols of tetraoxosulphate (iv) is needed to react with 2grams of calcium

Chemistry

How do I balance the following reaction in acidic conditions? N2O4 + S8 = NO + H2SO3????

chemistry

Molality is a unit of concentration that measures the moles of solute per

chemistry

What is (delta E) for the traansition of an electron from n=9 to n=4 in a Bohr hydrogen atom? What is the frequency? Thank you!

chemistry

how many grams of sodium metal are needed to give 781 g of hydrogen?

Chemistry

What is the concentration of hydronium ions in a solution that is 0.12 M HBrO(aq) and 0.160 M NaBrO(aq)?

Chemistry

I need to balance the equation of the reactants NaHCO3->CuCl2 please help me.

Chemistry

if the pressure read by the barometer is 0.882atm, what is the height of the column of mercury in cm?

Chemistry

The Ksp of manganese (II) hydroxide, Mn(OH)2 is 2.00x10^-13. Calculate the solubility of this compound in g/L?

Chemistry

What can be said about the presence of each of these groups of cations in the orginial solution

chemistry

how many moles of H2O are produced when 5.00 mols of oxygen gas are used

Chemistry

CIE and NIE for 2 K3PO4 + 3 Fe(NO3)2 = 6 KNO3 + Fe3(PO4)2

Chemistry

CIE and NIE for 2 K3PO4 + 3 Fe(NO3)2 --> 6 KNO3 + Fe3(PO4)2

Chemistry

he Ksp of mercury(II) hydroxide, Hg(OH)2, is 3.60 × 10-26. Calculate the solubility of this compound in g/L. I came up with x=2.8*10^-13

chemistry

write a reaction that show solid copper (II) nitrate dissociating.

chemistry

Hg2Cl2 = Hg + HgCl2 Please help me write the two half equations for this.

chemistry

In the reaction ZnO+2HCl=ZnCl2+H2O what is oxidized and what is reduced?

Chemistry

How many milliliters of 0.326 M HCl would be required to titrate 5.48 g KOH?

chemistry

How many grams of magnesium are required to produce a total of 4.05g of hydrogen

Chemistry

A 26.0 g sample of ice at -17.0°C is mixed with 124.0 g of water at 81.0°C. What is the equilibrium temperature?ºC.

Chemistry

How many atoms of each element are represented in the following: A.) 3NaCl B.) H2SO4 C.) 4H2SO4

Chemistry

Can alcohol dissolve any of these? PCl5 NaNO3 NH3 KOH KCl

Chemistry

Zn(s)+2HCl(aq) ->ZnCl2(aq)+Hx(g) How many millilters of 2.50M HCl(aq) are required to react with 3.95 of Zn(s)?

Chemistry

What are the Salts are taken into consideration in the calculation of the total alkalinity ????

chemistry

What are the products of the reaction between nitrous acid and strontium hydroxide?

Chemistry

Would it take more 0.1 M HCl or 0.1 M H2SO4 to neutralize 30 ml of NaOH?

chemistry

what will be the pressure of 0.010m of oxygen gas in a 4.5L flask at a temperature of 10,000C?

Chemistry

How many litters of Oxygen will be required to burn 3.8 liters of propane, C3H8?

chemistry

Calculate the amount of CO2 formed when 50 grams of CaCO3 decomposes?

Chemistry

How do i provide ionic equations , for example to this one --> HNO3(aq) + KOH(aq)

Chemistry

calculate the heat liberated when 15.0 g glucoseis metabolized to CO2 and H2O

Chemistry

How many kilojoules of heat are absorbed when 1.2 L of water is heated from 24oC to 86oC?

Chemistry

The temperature of a 2.25L sample of gas decreases from 45.0'C to 20.0'C. What is the new volume?

chemistry

Is it possible to identify a metal in a fragment if you only know the specific heat?

Chemistry

Balance Redox using reactions by the 1/2 reaction method. NaIO3 (aq) + KI (aq) -->„³ I2 (s)

Chemistry II

How long would it take to consume 13 mg of magnesium in 4.4 mL of 1.25 M HCl? Explain.

Chemistry II

How long would it take to consume 13 mg of magnesium in 4.2 mL of 1.25 M HCl? Explain.

physical chemistry

What is the Enthalpy of Decomposition of liquid Hydrogen peroxide (in kJ/mol)?

chemistry

Redox reaction in assign oxidation number is ca3(po4)2

chemistry

What is the molarity of a 28.9 g of CaCl2 dissolved in water to make up 0.78L of solution?

Chemistry

How would you prepare pure dry crystals of pottasium trioxonitrate (v) ?.

chemistry

if an excess of nitrogen is reacted with 3.41 g of hydrogen, how many grams of ammonia can be produced?

chemistry

the weight of one atom of uranium is 238 amu. its actual wt. is ......g

chemistry

How many milliliters of NO2 at 25.2 °C and 738 torr are needed to form 16.1 g of HNO3?

chemistry

What must be the velocity of a beam of electron if they are to display a de broglie wavelength of 1A°?

chemistry

4g NaOH is dissolved in 100mL of 2.5M H2SO4 will be required for its complete neutralization?

CHEMISTRY

If 2.5 * 10^-2 g of Fe(NO3)3 added to 100mL of 1.0 * 10^-4 M NaOH solution , will it produce precipitate ? thank you

CHEMISTRY

Why can't we use water in electrolytic cell during producing aluminium ?

CHEMISTRY

Is these two electrodes appropriate to create a good battery ? : Cd => Cd^+2 + 2e- and Fe => Fe^+2 + 2e- Explain

Chemistry

How much ethanol must be used to prepared 150 mL 10% by volume?

chemistry

how to find a structure factor of a face centerd cubic lattice

Chemistry

What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?

Chemistry

why can't the enthalpy of magnesium be measured using a coffee cup calorimeter?

Chemistry

Calculate the maximun=m mass of ethanol that can be made from 5.6 tonnes of ethen

Chemistry

What is dS (J/K) of the process when 0.5874 moles of H2 gas are compressed from 37.13 L to 29.13 L at constant temperature?

chemistry

how many mL or .0252M HNO3 are required to neutralize 25.00mL of .0148M of Sr(OH)2? and how did you get the answer!!!

Chemistry

Suggest why calcium compound produce a coloured flame but magnesium do not?

chemistry

in a reversable reaction H2+I2=2HI,what will happen to the equilibrium if the volume is decrease?

Analytical Chemistry

principles behind the dilution and aliquoting of the NaOH solution

chemistry

Discuss the difference in lattice enthalpy between NaCl and CsF

chemistry

Nickel is about 2 millimeter thick or 2/1000 of a meter.how many nanometer is this?

chemistry

why does alka-seltzer dissolve faster in hot than cold water

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