david

4NH3+7O2->4NO2+6H2O If [No2] is changing at a rate of 2.0mole/L second what rate is [NH3] changing at?

can two atoms of the same element form ionic bonds, covalent bonds, or both?

how do two atoms form an ionic bond how do two atoms form a covalent bond?

If water is added to 28.43mL of a 12.63M Ca(NO3)2solution to make150mL of solution, then what is the final concentration of calcium nitrate?

Why is it that most people tend to be more conservative as they get older?

Suppose a piece of silver jewelry contains 7.74×1022 atoms of silver (Ag) How many moles of silver atoms are in the piece of jewelry?

Explain what type of bond an atom with 2 electrons (NOT Helium) in its outermost shell will form.?

What is the pH of 0.050 M benzoic acid (Ka = 6.6 × 10^–5) is titrated with 0.05 M NaOH? Can you show me how to find the pH please?

Why did I USED to be good at math?

what is federal income tax ?

Please help me with this Geometry?

Chemical formula question?

chemical equation of propane , C3H8+5O2 -->3CO2+4H2O How many grams of O2(g) are needed to completely burn 62.0 g of C3H8(g)?

A sample of nitrogen gas has 2.68 x 10^22 molecules measured at 87.0 degrees C and 0.620 atm. What is it's volume?

How many times do you suppose to knock on a door?

Can someone help me with these Chemistry Problems? Write equilibrium expressions for the following reactions [...] denotes subscript?

Estimate the charge on 46g of Na+?

Why should you base your choice of what compound is the limiting reactant on its number of initial moles, not on its initial mass in grams?

Does impurities cause a substance to have no fixed boiling points? Does it also cause substances to take a longer time to boil?

Find all roots of the polynomial equation f(x)= x^3+x+10 (study guide practice question)?

What is 0.116 with the 16 repeating as an fraction?

iron with a mass of 25 grams is dropped into 100 grams of water. the change in temperature is 72. What is the temp change in the water?

Help with chemistry?

you need 0.0100 mole of lead (2) chromate. How mush should you weigh on the scale?

why is it impossible to have a sample of methene?

A radioactive isotope has a half-life of 173 days. How much of a sample of 100 grams of the isotope would remain after 732 days?

A student placed 16.5 g of glucose (C6H12O6) in a volumetric flask?

How many grams of Oxygen are in 152.21grams of CO2?

Why 0÷0 is math error? Ain't the answer 0? I know all numbers cannot be divided by 0, but...why? Whywhywhy?

Calculate molarity of the following solution?

Credit to trump?

who will win Trump or Hillary?

what is the fina equilibrium temperature when 40.0 grams of ice at 0°c is mixed with 5.00grams of stream at 120°c?

In periodic table why blocks are named as s p d f?

what is the product of this reaction?CH3CH2CH=CHCH3+CL2?

what happens when carbon disulphide is added to the mixture of heated iron filings and sulphur?

why co co2 carbonates and bcarbonates are not organic?

How would I solve this basic algebra equation?

Chemistry moles help please?

Prove that for any integers m and n, if m is odd and n is odd, then mn is odd.?

Chemistry question (limiting reagent).?

What mass of sulfur should be burned to produce 64.0 tonnes of sulfur dioxide?

what is the specific gravity of the new solution?

H2S + SO2 = H2O + S help balancing?

Why all alkenes are hydrocarbons?

How many grams of hydrogen (H2) are required to produce 81.6g of NH3?

Need help with the following problems thanks. Charles' and Boyle's law.?

Why did the chemical reaction stop?

Chemistry - Chemical Bonds Question?

Write the chemical equation of mixing hydrogen nitrate (HNO3) with water and what is the conjugate acid and conjugate base? HELP PLEASE!?