60,827 results, page 67
Is helium considered a noble gas?
if the solubilty of AgC2H3O2 is 5.0 x10^-2mol/L. What is the Ksp?
which acid produces brown fume on heating?
What is the number of molecules in 22. 4 dm^3 of nitrogen gas at STP?
?Fe(2+)+?NO3(-)+H(+)==》No+Fe(3+)+H2O What's the balanced equation?
What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M? A. 6.3 × 10-18 M B. 10.80 M C. 6.3 × 10-4 M D. 1.6 × 10-11 M DrBob222 can you help me with this question please?
Calculate the number of moles of Cl atoms in 6.28 mg CuCl2.
A compound contains 74,27%C;7,79%H;12,99%N. Determine the empirical formula. C=12;H=1;N=14;0=16.
How do you write the isotopic symbol for Uranium -238?
What are the names of the reactants in this equation? Mg (s) + 2HCl (aq) --> MgCl2 (aq) +H2 (g)
Say some exples for true solutions.
How do you do significant figures. How dobyou do dimensional analysis
How would you make .25 Liters of a .1 M MgCl2 solution?
Why sulphur dioxide is not directly dissolve in water?
what is the reaction between potassium chloride and bromine?
How many germanium atoms are present in 0.155g of the metal?
5.58g of Fe reacted with 3.0g of oxygen. How many moles of Fe were used?
Illustrate how to prepare a 1:3 solution of 0.5M hydrochloric acid
What is the pH of distilled water supersaturated with CO2 at 100psi?
How can I draw a lewis dot structure of XeF2O?
what is the name of this coordination compound [CoSO4(NH3)5]Br?
What is the molar solubility of silver carbonate, Ag2CO3?
What is the shape and bond angle of PH3? Explain
What is the mass in grams of a 15.8 L sample of ozone (O3) at 1.67 atm and 30.0 °C?
Which reaction below represents the second ionization of Lr?
A reaction of hydrolysis of Ba(NO) in a net ionic form?
Cu+HNO2-Cu(NO3)2+NO solved by oxidation no. Method
why is the spectrum of hydrogen composed of discrete lines?
illustrate how to prepare a 1:3 solution of 0.5 hydrochloric acid
what is the procedure for the preparation of 10 gram of lead iodide
WHAT ARE THE ALLOTROPES OF ANTIMONY
What group of elements were not on the original periodic table
what is the acid that is used to make ammonium nitrate???
how do you draw the skeletal structure for (z)-pent-2-ene.
How many molecules present in 500ml of 42g NaHCO3?
How many moles Of (Al2SO4)3 can be prepared from 2.5ml Of H2SO4
Calculate the energies of the states of hydrogen atom with n=2 and n=3
Calculate ΔG° for each of the reactions below in kJ. (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq)
What intermolecular forces are responsible for neoprene's stretchiness?
What intermolecular forces are responsible for neoprene's stretchiness?
Calculate the number of moles of 2.8 of nitrogen (iv) oxide.
Al2Br6, xpress your answer as a chemical formula?
Calculate the number of valence electrons in BF3.
Why was sublimation performed under reduced pressure?
How many grams of O2(g) are needed to completely burn 17.3 g of C3H8(g)?
How Would You Classify The Oxides Of period3A Elemet?
Mg(s) + FeCl2(aq) → MgCl2(aq) + Fe(s). IS THE IRON(II) ION OXIDIZED?
what is the net ionic equation for AlBr3(aq) + 3LiOH(aq)
If a chemical reaction uses 140 g of N2. How many moles is this? n=m/M
Calculate the concentration of all species in a 0.20 M KF solution.
what mass of h2o is formed when h2 reacts with 384g of o2?
What will be the color of litmus paper when tested with lime?
Rank from longest to shortest bond length: Si-O, Si-H, Si-S
what is the balanced equation for Sodium Hydroxide and Water
Why does CdS dissolve in HCL, when CuS and Bi2S3 will not?
How many molecules of lactose are there in one liter of buttermilk?
Does CH2CH2CH2CH2CH2CH2CH2 represent the polymer segment polyethylene?
The oxidation number of sulphur in CuSO4.5H2O is ......
water cannot cook beans on the moon.explain
Do all salts conduct electricity in water? Why or why not?
If 6.0g of CH4 and 5.0g of O2 are used, what is the mass of CO2 produced?
Find moles of O atoms in 9.00g of Mg(NO3)2.
What would be the name of this compound? Si4Br8
why the melting point of iron is greater the that of sodium?
Aldol condensation of formic acid will create?
How many grams of Al2(SO4)3 can be produced from 10.0g of CuSO4?
AsH3 is more acidic than NH3 explane
How many mL of 1.20 M H2SO4 are needed to neutralize 18.75 mL of 0.843 M LiOH?
If it takes 15.0 mL of 0.450 M HNO3 to neutralize 22.00 mL Cu(OH)2, what is the molarity of the Cu(OH)2?
Calculate the moles of Carbon dioxide in 7.5×10 power 24?
What is the positive valence of Sodium Sulfate? (Na2SO4)?
A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be?
Which type of solid is predicted for HCl, Na, CaCl2???
What is a chemical property of dihydrogen monoxide? please help
what is the common name for sodium acetate? please help
How does the saturation of a solution affect crystal formation?
how do i prepare a 500g/L solution of ethylene glycol
who understands heat release rate?
2 H2O (ℓ) ⇆ H3O+(aq) + OH-(aq) Kw = 4.57 x 10^-15 at 15 °C. Calculate the pH of 0.10 M NaOH at this temperature.
if you need 11.2 kg of N2H4 how many grams of H2O2 will be needed?
What is the condensed formula for 6-chloro-2-methyl-3-heptyne?
The molecules present in 5.2gms of glucose will be c6h12o6
What is the concentration in %m/m if 3.6g of NaCl dissolved in 400mL of water?
At room temperature pure water has a density of 1.00 g/ mL. What mass of water (in grams) will fit into a container if 1.00 lb. of mercury completely fills the container? Okay, here is what I solved so far. Let's say H2o equals water and Hg equals mercury= 13.6g/mL. equals an ...
For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix •Chemistry - ...
Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate ...
I'm sorry, but this is a re-post. I couldn't find the original post;-( so, does anyone have any suggestions for helping a student make a passing grade in college chemistry? She took it twice and didn't pass. Any suggestions would be appreciated. I thought maybe some websites ...
Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.70. You have in front of you * 100 mL of 7.00×10−2 M HCl * 100 mL of 5.00×10−2 M NaOH, and * plenty of distilled water. You start to add HCl to a beaker of water when ...
Hi, I'm trying to solve some chemistry problems, like the ones my teacher says will appear on our exams. The problem reads like this: What is the hydrogen conentration in a bleach sample that register 9.55 using a pH meter? My Attempt: Since this sample register a 9.55 on a pH...
General Chemistry 111 11/28/11 Chapter 9 Extra Credit Quiz Name: _____________________________ Section #______________________ Tetrahedral geometry has a bond angle of about 109.5 °. Given that a tetrahedron is made up of 4 equilateral triangles each of length x, what is the ...
Is the answer for part c 0.91? A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm. A)Calculate the partial pressures and mole fractions of Ar and N2 after the valve is opened and the gases are allowed to mix (they fill the balls on both ...
can a molecule act both as an electrophile & nucleophile?
What is the pH of a solution with [OH-] = 2.5 x 10-3? I don't even know where to begin with this problem :( You know [OH] + [H+] = 1*10^-14 so solve for [H+], then pH= -log [H+]
It forms NH4Cl, ammonium chloride, which is soluble in the water.
Which of these metals are important the the US economy and defense? Mn, Pt, Cr, Co, Pd, Fe i would say Cr Co Pd and Fe
a solution in which no more solid can be dissolved is referred to as ???? Saturated?
What is the exact concentration of hydroxide and hydrogen ions at pH 6?? Help! how do i find this?!?!?!
Do either maleic or fumaric acids have dipolemoment?
I need help with this conversion. 548.6 mL=_____ meters cubed