10/04/20

What is the mass of lead?
When 2.00 mol of PbSO4 forms in the following reaction, 768 kJ are released.Pb(s) + PbO2(s) + 2SO3(g) → 2PbSO4(s)What mass of lead, Pb(s), is used up when 2100 kJ of energy are released?
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10/03/20

Following all significant figure rules use your calculator to convert 9.7 feet to inches. You know that 12 inches = 1 foot. Only enter numbers for your answer.
enter answer using scientific notation.
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10/03/20

Following all significant figure rules use your calculator to solve: 2050 x 4.389. You may enter your answer using scientific notation.
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10/03/20

Reporting in scientific notation using e, use your calculator to solve: 6.52e15 x 22.3. Enter only 3 significant figures.
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10/03/20

Rearrange the following equation to solve for y: 7x=9y
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10/03/20

I don’t know how to find the answer to how many moles of CO2 are in 210. Liters

How many moles of CO2 are in 210. Liters at STP of the compound?
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10/03/20

Affecting the equilibrium
Hi! I need help with this question:Consider the following reactions: CO2 (g) + H2O (l) <-> H2CO3 (aq) + heat CaCO3 (s) + H2CO3 (aq) <-> Ca2+ (aq) + 2 HCO3- (aq) + heat How do you... more
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10/03/20

Le Chatliers Principle
Hi!I know that Le Chatliers principe states that if we for example increase pressure by decreasing the volume, then the equilibrium will shift to the reaction that gives least moles of gas. Does... more
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10/03/20

Complete combustion of 8.70 g of a hydrocarbon produced 27.8 g of CO2 and 9.96 g of H2O. What is the empirical formula for the hydrocarbon? Insert subscripts as necessary.
Complete combustion of  g of a hydrocarbon produced  g of CO2 and  g of H2O. What is the empirical formula for the hydrocarbon? Insert subscripts as necessary.
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10/02/20

I need help I don’t know how to convert

What is the Temperature of 0.495 more of neon in a 2.00 L vessel at 4.68 atm
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10/02/20

What is the enthalpy change?
Red phosphorus reacts with liquid bromine in an exothermic reaction, 2P(s)+3Br2​(l)→2PBr3​(g):Δr​Ho=−246 kJ. Calculate the enthalpy change when 7.03 g of phosphorus reacts with 31.2g liquid bromine?   more
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10/02/20

What is the final concentration of chloride ions?
A chemist dilutes 35.0 mL of a 0.811 M solution of calcium chloride into 515.0 mL of a 0.578 M solution of sodium chloride. What is the final concentration of chloride ions?
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10/02/20

How do I solve this
Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2Na(s)+2H2O(l)=2NaOH(aq)+H2(g)what is the pressure in atm of hydrogen gas in the 20.0 L headspace of a reactor... more
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10/02/20

I need help solving this question
How many liters of flying cats are needed to form 231 L Of sulfur hexafluoride gas if the following reaction takes place at 2.00 atm and 273.15 K?S(s)+3F2(g)=SF6(g)
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10/01/20

Determine the heat associated with the reaction

Given the balanced thermochemical equation,2 H2O(l) 2 H2 (g) + O2 (g)                     = +572 kJdetermine the heat associated with the reaction (qrxn) when5.9 moles of O­2(g) are produced. Round... more
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10/01/20

What is the change in internal energy (ΔE)

What is the change in internal energy (ΔE) for a system in kJ that produces 63.8 kJ of heat and is has 264 J of work on the system? Only enter the number and do not enter the unit. 
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10/01/20

What is the molarity of H2SO4(aq)
A 32.5 mL solution of H2SO4(aq) of unknown concentration was titrated with 0.12 M NaOH(aq).                H2SO4(aq) +2 NaOH(aq)  Na2SO4(aq) + 2 H2O(l)If it takes 21.4 mL of NaOH(aq) to reach the... more
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10/01/20

Chemical Reaction
Given a balanced chemical equation between H2SO4(aq) and KOH(aq)   H2SO4(aq) + 2 KOH(aq) → K2SO4(aq) + 2 H2O(l)What volume (in mL) of 0.69 M H2SO4(aq) solution is necessary to completely react with... more
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10/01/20

Precipitation Reaction
In a precipitation reaction between FeCl2(aq) and LiOH(aq), 11.9 mL of 0.210 M FeCl2(aq) completly reacted with 37 mL of LiOH(aq). What was the molarity of LiOH(aq)?FeCl2(aq) + 2... more
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10/01/20

Determination of the order of Hydroxide
First of all, I really appreciate the time taken to help me figure this out. I included my questions below with the details to hopefully help clear up my questions. As context, this is part of a... more
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10/01/20

What is the value of Kp?
An equilibrium is established for the reaction 2 CO(g) + MoO₂(s) ⇌ 2 CO₂(g) + Mo(s). At equilibrium the partial pressure of carbon monoxide is 5.21 atm and the partial pressure of the carbon... more
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10/01/20

Calculate the equilibrium concentration of NO
For the following reaction NO₂(g) + SO₂(g) ⇌ NO(g) + SO₃(g) K = 4.15 at a particular temperature. If NO₂ and SO₂ had initial concentrations of 0.650 M, and NO and SO₃ had initial concentrations of... more
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09/30/20

chemistry mole ratio
For the reaction 2 HCl(aq) + K2SO3(s)  H2O(l) + SO2(g) + 2 KCl(aq) answer the following questions. What is the mole ratio of HCl : K2SO3 in the equation?   3:1  2:1  1:1  1:2  1:3  2:3  3:2 How... more
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09/30/20

Consider balanced chemical reaction when phosphorus and iodine react to produce phosphorus triodide: 2P(s)+3I2(g)------>2PI3(g)
If 58.6 of I2(s) area reacted with excess P(s) to produce O . 147 mol of PI3(g),What percent yield of Pl3(g)?
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09/30/20

given the balance chemical equation, 2C2H6(g)+7O2(g)----->4CO2(g)+6H2O(g)
If a reaction mixture contains 8 moles of O2(g) with 2 moles of C2H6(g),which reactant is the limiting reactqnt and what is the mass (in grams) remaining of the reactant in excess?
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