戇戇居士

concentration of the final solution? Chemistry question?

Help! Could someone please explain how to solve.?

How many grams (to the nearest 0.01 g) of NH4Cl (Mm = 53.49 g/mol) must be added to 800. mL of 1.202-M solution?

Help in Chemistry?

You need to make an aqueous solution of 0.182 M chromium(III) nitrate for an experiment in lab, using a 500 mL volumetric flask.?

IUPAC name of [Mn(CO)5]+?

Net Ionic Equations help?!?

An aqueous solution of barium hydroxide is standardized by titration with a 0.128 M solution of hydroiodic acid.?

K2SO4 is a strong electrolyte. Determine the concentration of the ions in a 0.250 M K2SO4 solution. [K+]= ____ M [SO4 2-]=___ M?

What was the concentration of the HNO3 solution?

If the mass ratio of K to F in a compound is 2.06:1, how many grams of F are needed to react with 97.5 g of K?

50mL of .1M HCl, how many moles H3O+?

Calculate the number of moles in 20g CaCO3?

is reactivity the physical property?

What's the chemical formula for Tin(1) Sulfide?

Which of the following equations does not represent a redox reaction? Is my answer correct?

What mass of precipitate forms when 200.00 mL of 0.500 M NaCl is added to 650 mL of a solution that contains 15.5 g of silver sulfate?

農曆77年9月21日晨3時41分生的八字有多種呢?

請問大大農曆77年9月21日晨3時41分生的八字有多重呢? 感謝?

why do amines act as a base but amides do not?

Two gases NO & O2 were introduced at the twoends of a 1m long tube simultaneously.At what distance from NO gas end, Brownfumes will be seen?

Two gases NO & O2 were introduced at the twoends of a 1m long tube simultaneously.At what distance from NO gas end, Brownfumes will be seen?

hi please help with my chemistry?

Select the equation below that gives the correct relationship between the internal pressure of a gas and the volume of a flexible container?

Chemistry?

Chemistry help!! Write the equation for calcium oxide is warmed gently in sulfur trioxide gas.?

How much energy in kJ/mole are given off by hydrogen atoms if an electron falls from the n = 10 state to the n = 3 state?

HELP!!!! CHEM HOMEWORK! Consider the balanced chemical reaction shown below. 1 Ca3P2(s) + 6 H2O(l) 3 Ca(OH)2(s) + 2 PH3(g)?

Hard Chemistry Titration Calculations Question! Help?

In which of the following compounds does the charge cloud arrangement match the molecular shape? 1.PI3 2.SiF4 3 BeCl2 4.H2O 5.BBr3?

If you have 0.132g of NO2 at a pressure of 100kPa and a temperature of 25 Degrees Celsius, what is the volume in dm^3?? Chem a level help?

Temperature of gas?

What is Hydrogen s oxidation number if combined with both a metal and a non metal?

A 9.25-L container holds a mixture of two gases at 13 °C. Help PLEASE!?

Please help 16g of methane reacts with 64g of oxygen to give 36g of water. Calculate the mass of carbon dioxide produced.?

what is the loss in the mass when 1.25 g of blue copper(II) sulphate crystals is heated and decomposed to anhydrous copper (II) sulphate?

Please explain why x^2 • -x^-2 = -1?

Write Structural Formula for organic product formed in the reaction of methyl bromide with NaOH.?

What mass of silver chloride can be produced from 1.73 L of a 0.174 M solution of silver nitrate?

basic chemistry question?

What are the oxidation numbers of Al(OH)4^-?

What is the molecular shape for BrF4+?

What is the pH of a solution that contains 0.045 moles of NH4+ and 0.0090 moles of NH3? The pKa of ammonia is 9.25. Need help with process..?

A number divided by 2 is equal to 12 less than the original number what is the number?

F5 Mathematics?

Physics help?

Chemistry help???!!?

A ball is thrown upward and reaches a height of 3 meters. What is the initial velocity of the ball and the time to reach the 3 meters?

Let x ◦ y = (x − 2y)2 for all integers x and y. Which of the following is the value of 5 ◦ (−3)?

mixture of co2 n co is passed over red hot graphite when 1 mole of mixture changes to 33.6l(stp)the mole fraction of co2 in the mixture is?