11/17/24

Could someone please help me?
Using the following balanced equation: 4K + O2 → 2K2O How many grams of potassium oxide (K2O) are formed from 8.1 g of oxygen (O2) reacting with excess potassium?
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11/16/24

Can someone please help me?
Using the balanced chemical equation: H2 + Cl2 → 2HClHow many grams of hydrochloric acid (HCl) are produced from 2.7 g of chlorine (Cl2) reacting with excess hydrogen? 
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11/16/24

Can someone please help me?
Using the balanced chemical equation: H2 + Cl2 → 2HCl How many grams of hydrochloric acid (HCl) are produced from 9.5 g of hydrogen (H2) reacting with excess chlorine?
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11/14/24

Chemistry Volume and Pressure
The valve between a 5 L tank containing a gas at 9 atm and a 10 L tank containing a gas at 6 atm is opened. Calculate the final pressure in the tanks.
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11/10/24

How do you balance chemical equations?
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11/09/24

The Moles and The Avogadro Constant
Another large-scale industrial process is the production of quicklime (calcium oxide, CaO) from limestone by heating in a lime kiln. a. What is the equation for the thermal decomposition of... more
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11/06/24

Hess' Law & Calorimetry

If 3.000 g of iron metal are reacted in a calorimeter with a heat capacity of 350.0 J/°C, what would be the final temperature of the calorimeter if its initial temperature were 20.0°C?
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11/06/24

Chemical kinetics

A reaction container initially contains 225.0ml of a 0.200M AB solution, which reacts to from the gaseous products. The products are collected over water at 22.0c. Determine the amount of time... more
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11/06/24

The mechanism for the reaction described the equation

Where A is CH3NC, M is any gas molecule A is an energized gas molecule and B is CH3CN. Assuming that A is governed by steady state conditions derive the rate law for the production of CH3CN in... more
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11/05/24

Complete and balance the following redox reaction in acidic solution. Be sure to include the proper phases for all species within the reaction.
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11/01/24

Calculate the energy (in Joules) of a single photon of blue light with a frequency of 6.10 × 10¹⁴ Hz. (h = 6.626 × 10⁻³⁴ J • s)
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10/31/24

Chemistry-temperature
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 19.0 cm wide and 22.8cm... more
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10/30/24

calculate the mass of a liquid with a density of 2.5g/ml and a volume of 15ml
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10/30/24

calorometer constant
Assume you produce 2 moles of water in the neutralization reaction of HCl and NaOH with a temperature increase of 5 degrees. What is your calorimeter constant?
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10/21/24

At 460 K, the rate constant for this reaction is k = 5.8 × 10–6 s–1 and the activation energy is Ea = 265 kJ/mol. What is the frequency factor for this reaction?

The compound 1,1-difluoroethane decomposes at elevated temperatures to give fluoroethylene and hydrogen fluoride according to the equation: CH3CHF2----->CH2CHF+HF
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10/21/24

Calculate the value of the equilibrium constant for the following reaction.
Given:2C <==> D ... Kc = 6.52x10-4Given:D <===> 3A + 3B ... Kc = 4.32x10-2A + B <==> C
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10/21/24

What was the wavelength of the second photon emitted?
A ground-state H atom absorbs a photon of wavelength 97.25 nm, and its electron attains a higherenergy level. The atom then emits two photos: one of wavelength 486 nm to reach an intermediatelevel,... more
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10/21/24

Which element in the following set would you expect to have the lowest IE3? Why?
Na, Mg, Al Al, Li, B
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10/21/24

13.9 g of NACl dissovled in 200. g of water. the temperature of the water fall from 22.0 degrees celsius to 19.7 degrees celsius over 6.7 mins. Is this reaction exothermic, endothermic, or neither?
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10/19/24

need a carbon remover.
hello,what chemical can i use to remove carbon from firearm parts?i have been told that carbon cant be broken down into other elementsso when a company make a "carbon dissolver " its mostly a... more
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10/14/24

Structures and Intra/Inter-Molecular Hydrogen Bonds
I need help drawing the structures in particular how the conformation would make for good H-bond alignment. I am also unsure of how to properly indicate the intra and inter-molecular H-bonds.1)... more
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10/12/24

Change in enthalpy
change in enthalpy for the reaction 4xy³ + 7z² —> 6y²z + 4xz²? Given the thermal equations x²+3y² —> 2xy³, ΔH equals -310, x² + 2z² —> 2xz², ΔH-180, 2y² plus z² chemical reaction 2y²z, ΔH-... more
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10/10/24

Energy Released for a Photon of Light.
A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy must be released by an electron in a mercury atom to produce a photon of this light?Please... more
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10/09/24

Calculate the heat change per mole of reaction
React 100.0 mL of 0.400 M hydrochloric acid with 90.0 mL of 0.500 M sodium hydroxide in a bomb calorimeter with a heat capacity of 6.25 kJ/°C. The reaction made the temperature of the thermometer... more
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10/09/24

Calculate the molar enthalpy

React 50.0 mL of 0.250 M sulfuric acid with 50.0 mL of 0.250 M potassium hydroxide in a bomb calorimeter. If the initial temperature of both reactants were 22.10oC and the final temperature of the... more
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