J.R. S.

Chemistry Percent Yield/ Limiting Reactant

04/04/19

mixing 108 g of propane, C3H8, with 232 L of O2 at STP. How many grams of CO2 will be produced? The balanced equation for this reaction is: C3H8 + 5 O2 →3 CO2 + 4 H2O

I am taking an online chemistry class and the teacher is not much help with anything... I was hoping someone here could explain it to me?

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Elementary (k 6th) Elementary Math 6th Grade

04/04/19

Use dimensual analysis to convert 9 teaspoons to tablespoons

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Chemistry

04/04/19

balance using the half reaction method?

Question 7 options:Answer the following questions and balance the equation below using the half-reaction methodAgOCN(aq) + Co(s) → Co(OH)2(s) + Ag(s) + OCN−(aq)To balance the number of electrons,... more

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Chemistry

04/04/19

oxidation half reaction question?

Given the following net ionic equation:2 Al(s) + 6 H+(aq) → 2 Al3+(aq) + 3 H2(g)The reaction that represent the oxidation half-reaction is:Question 6 options: a. Al(s) → Al3+(aq) + 3... more

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Chemistry

04/04/19

Find the oxidation half reaction?

Given the following net ionic equation:2 Al(s) + 3 Zn2+(aq) → 2 Al3+ (aq) + 3 Zn(s)The reaction that represent the oxidation half-reaction is:Question 2 options: a. Zn(s) → Zn2+(aq) +... more

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Chemistry

04/04/19

A reaction of 57.5 g of Na and 44.1 g of Br2 yields 52.1 g of NaBr . What is the percent yield? 2Na(s)+Br2(g)⟶2NaBr(s)

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Nursing Medications Wound Care

04/04/19

How important is the amount of active ingredient in an ointment?

I own a small tin of "Dr Chase" ointment that is probably 40 years old. This stuff is amazing. In my family we save it for particularly stubborn or difficult cuts and sores because it will heal... more

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Biology Biochemistry Cell Membrane

04/04/19

Why does a "cascade" of events happen during signal transduction?

I've been watching some videos on signal transduction and it says that because there are enzymes being activated by the signal, then there is a "cascade" which happens afterwards...I don't... more

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Chemistry

04/03/19

Using the equation below, how many grams of HCl are made if we react 2.35 grams H2 with excess Cl2? H2 + Cl2 → 2 HCl

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Chemistry Meq Calculation

04/03/19

mEq calculation

Order 20mEq /L of KCL needs to be added to a 1L fluid bagon hand 20 ml KCL bottle with a concentration of 2mEq/L how much KCL do you draw up to add to the 1L fluid bag

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Chemistry

04/03/19

If 49.0g of H3PO4 is reacted with excess KOH, determine the percent yield of K3PO4 if you isolate 49.0g of K3PO4

Given the the equation : H3PO4 + KOH

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Chemistry Mixture Word Problems

04/02/19

I need 850mL of a 15% alcohol solution. On hand i have 85% alcohol mikxture. How much of the 85% alcohol mixture and pure water will i need?

x+.85=.85x850+.15=127.5What is the percentage for pure water?

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Chemistry Depression In Freezing Point

04/02/19

The molal freezing point constant for water is 1.86 k.kgmole^-1. the freezing point of 0.1m nacl solution is

Question from depression of freezing point .∆Tb=T°f-Tf

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Chemistry

04/01/19

Starting with 21.5 moles of O2 in a bottle, calculate the volume of O2 the bottle could deliver to a climber at an altitude where the temperature is –38.0°C and the atmospheric pressure is 0.402 atm.

Starting with 21.5 moles of O2 in a bottle, calculate the volume of O2 the bottle could deliver to a climber at an altitude where the temperature is –38.0°C and the atmospheric pressure... more

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Chemistry

04/01/19

What is molarity of H2SO4 having pH2?

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Chemistry Bomb Calorimetry

04/01/19

what is ΔE of combustion of octane in a bomb calorimeter

a bomb calorimeter is used to determine the amount of energy liberate when a sample of octane is combusted. the bomb calorimeter is calibrated by combusting 7.62 g of methane (CH4, MW=16.0 g/mol,... more

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Chemistry

04/01/19

what volume of F2 gas reacts completely with Cl2 gas to produce 2 L of ClF5?

at stp, 1.0 L of Cl2(g) reacts completely with a volume of F2(g) to produce 2.0 L of ClF5. what volume of F2(g) reacted completely?

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Chemistry Calorimetry

04/01/19

calorimetry: final temperature of the solution formed after NaCl is dissolved in water

consider the following reaction: NaCl (s) -> Na+ (aq) + Cl- (aq) ΔH=3.88 kJ/mol In a coffee-cup calorimeter you dissolve 23.3 g of this salt in 117 g of water at 27.7 C. what will be the final... more

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Chemistry

04/01/19

average velocity of molecules versus temperature

if the molecules in 1.0 L of each of the gasses shown below are all moving with the same average velocity, which gas sample is at the third highest temperature? Cl2 CoCl2 NH3 Kr the temperature is... more

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Chemistry

04/01/19

volume of Manganese(iv) chloride needed to make a solution with chloride concentration of .131 M

what volume of .746 M manganese(iv) chloride is needed to make 680. ml solution of this salt with a chloride concentration of .131 M?

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Chemistry

04/01/19

moles of CH4 effused in the same time as Ar gas

over a 14.5 minute period 4.17e-3 moles of Ar gas (molar mass=39.95 g/mol) effuses from a container. how many moles of CH4 gas (molar mass=16.04 g/mol) could effuse from the same container in the... more

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Chemistry

03/31/19

How many grams of potassium bromite (KBrO2) are there in 0.144 mol ?

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Chemistry

03/31/19

Suppose you have two samples that are equal in weight, 23.8 g Zn and 23.8 g Fe2O3 . Calculate the number of moles of each substance.

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Chemistry

03/31/19

What is the number of formula units in a 4.64 mol sample of FeCl3 ?

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Chemistry

03/31/19

Calculate ∆H for the reaction (j)

Calculate ∆H for the reactionCa(s) + ½ O2(g) + CO2(g) → CaCO3(s)given the following data: Equation∆H Ca(s) + ½ O2(g) → CaO(s) -635 kJ CaCO3(s) → CaO(s) + CO2(g) 178 kJ ∆H = kJ

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mixing 108 g of propane, C3H8, with 232 L of O2 at STP. How many grams of CO2 will be produced? The balanced equation for this reaction is: C3H8 + 5 O2 →3 CO2 + 4 H2O

Use dimensual analysis to convert 9 teaspoons to tablespoons

balance using the half reaction method?

oxidation half reaction question?

Find the oxidation half reaction?

A reaction of 57.5 g of Na and 44.1 g of Br2 yields 52.1 g of NaBr . What is the percent yield? 2Na(s)+Br2(g)⟶2NaBr(s)

How important is the amount of active ingredient in an ointment?

Why does a "cascade" of events happen during signal transduction?

Using the equation below, how many grams of HCl are made if we react 2.35 grams H2 with excess Cl2? H2 + Cl2 → 2 HCl

mEq calculation

If 49.0g of H3PO4 is reacted with excess KOH, determine the percent yield of K3PO4 if you isolate 49.0g of K3PO4

I need 850mL of a 15% alcohol solution. On hand i have 85% alcohol mikxture. How much of the 85% alcohol mixture and pure water will i need?

The molal freezing point constant for water is 1.86 k.kgmole^-1. the freezing point of 0.1m nacl solution is

Starting with 21.5 moles of O2 in a bottle, calculate the volume of O2 the bottle could deliver to a climber at an altitude where the temperature is –38.0°C and the atmospheric pressure is 0.402 atm.

What is molarity of H2SO4 having pH2?

what is ΔE of combustion of octane in a bomb calorimeter

what volume of F2 gas reacts completely with Cl2 gas to produce 2 L of ClF5?

calorimetry: final temperature of the solution formed after NaCl is dissolved in water

average velocity of molecules versus temperature

volume of Manganese(iv) chloride needed to make a solution with chloride concentration of .131 M

moles of CH4 effused in the same time as Ar gas

How many grams of potassium bromite (KBrO2) are there in 0.144 mol ?

Suppose you have two samples that are equal in weight, 23.8 g Zn and 23.8 g Fe2O3 . Calculate the number of moles of each substance.

What is the number of formula units in a 4.64 mol sample of FeCl3 ?

Calculate ∆H for the reaction (j)

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