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What is the mole ration of o2 to co2?

a 10.0mL sample of mercury weighs 135.5g. Calculate the density of the mercury sample and express your answer in SI units for density.?

if y=1-tanx/1+tanx find dy?dx?

A sample of neon occupies a volume of 461 mL at STP. What will be the volume of the neon when?

Need help with this chemistry dimensional analysis problem!?

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CHEMISTRY HELP: MOLAR MASS BOILING POINT?

What is the molar mass of a gas that has a density of 1.25 g/L? If the gas is comprised of a single element, what would that element be?

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Question text How many kilograms are in 9.70 x 10-4 moles of titanium? .?

A Gas expands and does PV work on its surroundings equal to 334 J. At the same time, it absorbs 126J of heat from the surroundings.?

What is 2sin(x)=tan(x/2)?

Evaluate 10 C 7 and 9 P 3?

If 50.0 g of H2 and 100.0 g of O2 react how many moles of H2O can be produced in the reaction below? 2H2(g) + O2(g) -> 2H2O(g)?

Calculate the osmotic pressure of each of the following aqueous solutions at 20.00°C?

Determine the molarity of each of the following solutions from its osmotic pressure at 25°C.?

A 181 mg sample of a nonelectrolyte isolated from throat lozenges was dissolved in enough water to make 10.0 mL of solution at 25°C.?

Probability help!?

Chemistry homework help?

Given K = 3.45 at 45°C for the reaction A(g) + B(g) equilibrium reaction arrow C(g)?

which of the following is the solution to the equation in terms of the unknown constant a 8^(x-2a)= 1/2^(5a) x=1/3a x=5/2a x=-1/2a or x=-a?

balanced equation for aluminum chloride + calcium hydroxide =aluminum hydroxide + calcium chloride?

Write the balanced formula equation for this reaction: HNO3 + NH3 → Enter your answer as the sum of coefficients.?

Where am I going wrong on this integrated rate law problem?

Please help?

What volume of H2(g) is produced when 6.70 g of Al(s) reacts at STP? 2Al(s)+6HCl(aq) ---->2AlCl3(aq)+3H2(g)?

Help with chemistry question! 10 its Rate of formation?

Insert five numbers between 0.125 and 8 so that the seven numbers form a geometric sequence.?

osmotic pressure?

Chem 102!!?

Compute the pKa of HAc.?

Physics momentum question?

stoichiometry help please?

Ammonia gas occupies a volume of 57.9 L at a pressure of 532.4 atm. If the pressure were lowered to 256.8 atm, what would the new volume be?

Can someone help me with this geometry problem?

Consider the reactionCH4(g) + CCl4(g) → 2CH2Cl2(g) Given an initial mass of 17.02 g CH4, an excess of CCl4, and assuming that all of the reactant is converted to product(s), and none is lost, calculate the mass (g) of CH2Cl2 produced by the reaction.?

A volume of 80.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4).?

What is the mole fraction of LiCl in a mixture of 0.564g NaCl, 1.52g KCl and 0.857g LiCl?

I can't do this kinetic energy question. I've got the mark scheme but I still don't get it. Please help!?

Which compound is more soluble in the given solvent, and WHY?

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Nitrogen gas from decomposition problem. Please show how to do this?

Help, how do you solve this?

The density of a certain gas at 27.0°C and 98.66 kPa is 2.53 g/L. Calculate the molecular mass.?

is group 1 and 6 a ionic compound or molecular?

KO2 - (ox. number oxygen - 1/2) is used to produce O2 in space expeditions by using CO2 according to?

A 2 kg box is sliding across ice at 2 m/s. If 40 J of work is done on the box ...?

Prove that cosec2A+cosec4A+cosec8A=cotA-cot8A?

How does the lewis structure for XeSe4 look like?

What macro-molecule is made up of only H and C and is not soluble in water?