# a sample of gas has a mass of 38.8 mg. Its

Get college assignment help at uniessay writers a sample of gas has a mass of 38.8 mg. Its volume is 224 mL at a temperature of 55 degrees celcius and a pressure of 886 torr. Find the molar mass of the gas.

## why is it only monosubstitution products are obtained in acylation of

why is it only monosubstitution products are obtained in acylation of the substrate compounds

## If an open-tube manometer contains a nonvolatile silicone oil (density 1.30

If an open-tube manometer contains a nonvolatile silicone oil (density 1.30 g/cm^3) instead of mercury (density 13.6 g/cm^3) what are the pressure in the flasks? The first flask contains a height of 140. mm and the second one contains a height of 175 mm. the atm over the flasks is 760 torr

## Electron Configuration: Express your answer in condensed form in order of

Electron Configuration: Express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. For example, [He]2s^22p^2 should be entered as [He]2s^22p^2. Write electron configurations for each of the folloeing elements:Ga, As.

## You are given the following data. S(s) 3/2 O2(g) →

You are given the following data. S(s) 3/2 O2(g) → SO3(g) ΔH = -395.2 kJ 2 SO2(g) O2(g) → 2 SO3(g) ΔH = -198.2 kJ Calculate ΔH for the reaction below. S(s) O2(g) → SO2(g)

## A 3.50-g sample of magnesium hydroxide was treated with 50.0 mL

A 3.50-g sample of magnesium hydroxide was treated with 50.0 mL of a 0.500 M aqueous sulfuric acid solution. Calculate the number of grams of magnesium hydroxide that remained undissolved.

## What is the pH of the acid?

What is the pH of the acid?

## What is the pH of the solution?

What is the pH of the solution?

## Calculate the equilibrium concentrations.

Calculate the equilibrium concentrations.

## A green leaf has a surface area of 2.45 cm2. If

A green leaf has a surface area of 2.45 cm2. If solar radiation is 1030 W/m2, how many photons strike the leaf every second? Assume an average of 504 nm for solar radiation.

## the volume of a large, irregularly shaped, closed tank is determined

Get college assignment help at uniessay writers the volume of a large, irregularly shaped, closed tank is determined as follows. the tank is first evacuated, and then it is connected to a 50.0L cylinder of compressed nitrogen gas. the gas pressure in the cylinder, originally at 21.5 atm falls to 1.55 atm without a change in temperature. what is the volume of the tank?

## In Part A, you found the amount of product (3.80 mol~P_2O_5)

In Part A, you found the amount of product (3.80 mol~P_2O_5) formed from the given amount of phosphorus and excess oxygen. In Part B, you found the amount of product (3.40 mol~P_2O_5) formed from the given amount of oxygen and excess phosphorus. Now, determine how much P_2O_5 is produced from the given amounts of phosphorus and oxygen.

## What is ΔG (in kJ) at 69 ºC for the phase

What is ΔG (in kJ) at 69 ºC for the phase change of nitromethane from the liquid to the gaseous state? CH3NO2(l) → CH3NO2(g) CH3NO2(l): ΔHo = -113.1 kJ/mol and So = 171.8 J/K mol) CH3NO2(g): ΔHo = -74.7 kJ/mol and So = 274.4 J/K mol)

## Calculate ΔG (in kJ) at 298 K for some solid ZnF2,

Calculate ΔG (in kJ) at 298 K for some solid ZnF2, 0.049 M Zn2 and 0.056 M F-(aq).

## Assignments Assignment List Assignment Notes Unit Menu Previous Item Next Item

Assignments Assignment List Assignment Notes Unit Menu Previous Item Next Item Communication Send Message View Messages Chemistry Tables e-Book Go Chemistry® Thinkwell Videos MDC-link ANGEL-Link Status : 1 2 3 6:10 PM ——————————————————————————– You must answer 2 of 3 questions correctly in the SAME attempt at this Unit to receive credit for it. After answering the questions in this Unit, press Unit Menu to go to other Units in this Assignment or to redo this Unit. ——————————————————————————– Chemical Formulas Scientific Notation Periodic Table Tables A local AM radio station broadcasts at a frequency of 823 kHz. Calculate the wavelength at which they are broadcasting. Wavelength = m

## A local AM radio station broadcasts at a frequency of 823

A local AM radio station broadcasts at a frequency of 823 kHz. Calculate the wavelength at which they are broadcasting.

## rm PF_3Cl_2 is a nonpolar molecule. Based on this information, determine

rm PF_3Cl_2 is a nonpolar molecule. Based on this information, determine the rm F!!-!!P!!-!!F bond angle, the rm Cl!!-!!P!!-!!Cl bond angle, and the rm F!!-!!P!!-!!Cl bond angle

## If the density of gasoline is 0.831 g/ml, how many kilograms

If the density of gasoline is 0.831 g/ml, how many kilograms of CO2 are produced by burning one L of gasoline, assuming the following equation: C8H18 12.5 O2 â€ô€ƒ† 8 CO2 9 H2O

## Ethanol, is obtained from renewable crops such as corn, which use

Ethanol, is obtained from renewable crops such as corn, which use the sun as their source of energy. In the United States, automobiles can now use a fuel known as E10 that contains 10.0% ethanol and 90.0% unleaded gasoline by volume (%v/v). Ethanol has a melting point of -115 , a boiling point of 78 , a heat of fusion of 23.6 , and a heat of vaporization of 201 . Liquid ethanol has a density of 0.796 and a specific heat of 0.588 . 1. How many kilojoules are needed to vaporize 5.00 of ethanol at 78 °C? 2.When 25.0 of ethanol at -20 is heated to , how much energy, in calories, is required? 3.If a 25-gallon gas tank is filled with E10, how many liters of ethanol are in the gas tank? 4.Write the balanced chemical equation for the reaction of ethanol with oxygen gas to produce carbon dioxide and water vapor. 5.How many kilograms of carbon dioxide, , are produced from the complete reaction of the ethanol in a full 25-gallon gas tank? 6.When 25.0 of ethanol at -20 is heated to , how much energy, in calories, is required?

## What is the molarity of a solution that contains 65.0 g

What is the molarity of a solution that contains 65.0 g of vitamin B1 hydrochloride (molar mass = 337 {rm g}/{rm mol}) in 150 mL of solution?

## Consider a container of volume 5.0 dm3 that is divided into

Consider a container of volume 5.0 dm3 that is divided into two compartments of equal size. In the left compartment there is nitrogen at 1.0 atm and 25°C; in the right compartment there is hydrogen at the same temperature and pressure. Calculate the entropy and Gibbs energy of mixing when the partition is removed. Assume that the gases are perfect.

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