Gaseous and liquid states Questions and Answers

A rigid container at 40°C and a pressure of 105 kPa is warmed up to 95°C. What is the new pressure of the container? Report your answer to the hundredths place and don't forget to include units! No work, no credit, no kidding!

A 2.5-liter balloon filled with carbon dioxide at 750 mm Hg and 15°C is lowered in the ocean where the pressure increases to 3000 mmHg and the temperature drops to 5°C. What is the new volume of the balloon? Report your answer to the hundredths place and don't forget to include units! No work, no credit, no kidding!

A 12-liter tank filled with carbon dioxide has a pressure of 2.3 atm and a temperature of 35°C. How many moles of the gas does it contain? Report your answer to the hundredths place and don't forget to include units! No work, no credit, no kidding!

Suppose you have 150. mL of a substance with a density of 44.0 g/dm³ and want to determine the mass of the substance. The calculation can be broken down into three steps. First, convert the volume from milliliters to liters. Then, convert the volume from liters to cubic decimeters. Finally, determine the mass of the sample in grams. Show the unit analysis by placing the correct components into the unit-factor slots. The question marks (?) represent the answer

Suppose you have 2.50 L of a substance with a density of 5.00 g/mL and you want to determine the mass of the substance. The calculation can be broken down into three steps. First, convert the volume from liters to milliliters. Then, determine the mass of the sample in grams. Finally, convert the mass from grams to kilograms. Show the unit analysis by placing the correct components into the unit-factor slots. The question marks (?) represent the answer to the previous step.

An oxygen tank (O₂) has a volume of 25 L at a 300. mmHg. If the pressure changes to 575 mmHg, what is the new volume in liter (L) at constant temperature (T) and amount (n)?

The volume of an oxygen (O₂) tank increased to 33 L when the pressure changed from 250 torr to 125 torr, what was the original volume of the tank of oxygen in liters (L) at constant temperature (T) an amount (n)?

An oxygen (O₂) tank has a volume of 26 L at a pressure of 110 mmHg and at a temperature of 10 °C. What is the new volume in liters (L) if the temperature increased to 125 °C and the pressure changes to 150 mmHg at a constant amount (n)?

Ethylene glycol (antifreeze) has a density of 1.11 g/cm³. What is the mass in g of 427 mL of ethylene glycol? Express your answer using three significant figures.

Consider the reaction of 45.0 mL of 0.355 M copper nitrate with 0.246 g of Aluminum metal. What is the limiting reagent? What mass of Cu could theoretically be produced? If 0.782 g of copper are actually collected, what is the percent yield? Al(s) + Cu(NO3)2(aq) → Al(NO3)3(aq) + Cu(s)

6A piece of polypropylene rope (used for water skiing) floats on water, whereas a terephthalate polymer from a soda bottle sinks in water. What is the order of these substances in increasing density ? water < polypropylene < soda bottle plastic polypropylene < water < soda bottle plastic polypropylene < soda bottle plastic < water soda bottle plastic < water < polypropylene

Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting? * Heterogeneous mixture Compounds Homogeneous mixture Elements

In an experiment, a student took a 12.2 g sample of table salt and chemically separated the chlorine from the sodium. He determined that there were 5.2 g of chlorine in the sample. What is the percent composition of each element in the table salt?

Copper has a density of 8.91 g/cm³. A coil of pure copper wire has a mass of 25.0 g. What is the volume in cm³ of this copper sample? Report your answer to three significant digits!

Which best explains why the trend in noble gas boiling points increases down the group? A) increasing dispersion interactions. B) increasing dipole-dipole interactions C) increasing ion-dipole interactions D) increasing hydrogen bonding interactions E) increasing ion-ion interactions

An unknown solution gives a scarlet-red flame test, but no reaction with ammonium carbonate, ammonium phosphate, or ammonium sulfate. The halide test produces no color in the upper hexane layer. Identify (a) the alkali or alkaline earth element, and (b) the halide present in the unknown solution.

A sample of neon gas has its volume tripled and its temperature held constant. What will be the new pressure relative to the initial pressure?

Water has a density of 1.0 g/mL. Which of the objects will sink in water? Object I: mass = 50.0 g; volume = 60.8 mL Object II: mass = 42.1 g; volume = 65.2 mL Object III: mass = 100.0 g; volume = 20.0 mL

4338 mg to kilograms Express your answer to four significant figures and include the appropriate units. 0.0171 L to milliliters Express your answer to three significant figures and include the appropriate units.

A U.S. 1-cent coin (a penny) has a diameter of 19 mm and a thickness of 1.5 mm. Assume the coin is made of pure copper, whose density and approximate market price are 8.9 g/cm³ and $2.85 per pound, respectively. Calculate the value of the copper in the coin, assuming its thickness is uniform. Express your answer in dollars to two decimal places.

A runner wants to run 10.5 km. She knows that her running pace is 6.1 mi/h. How many minutes must she run? Hint: Use 6.1 mi/h as a conversion factor between distance and time. Express your answer using two significant figures.

Since density depends on the mass and volume of an object, we need both of these values combined in the correct way to solve for density. Keep in mind that we may not be given the mass and volume directly, or the values may not be given in the units we want and we need to convert to the correct units before solving for density. When converting between metric units, use the prefixes to help you determine the magnitude of a value. The prefix k indicates kilo, 1000. Therefore 1000 g = 1 kg. A 23.0 kg iron weightlifting plate has a volume of 2920 cm³. What is the density of the iron plate in g/cm³ ? Express your answer in grams per cubic centimeter to three significant figures.

A copper refinery produces a copper ingot weighing 150 lb. If the copper is drawn into wire whose diameter is 7.00 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm³. (Assume that the wire is a cylinder whose volume is V = πr²h, where r is its radius and h is its height or length.) Express your answer using two significant figures.

Sr, Sb, I Rank elements from largest to smallest ionization energy. To rank items as equivalent, overlap them.

Give the mass of the solute and mass of the solvent for 240 g of a solution that is 0.70 m in Na2CO3, starting with the solid solute. Express your answers using three significant figures. Enter your answers numerically separated by a comma.

What volume of water in Liters could be placed in a cylinder 925 inches in diameter and 10.0 inches tall. The volume of a cylinder is πr^2h. 2.54 cm = 1.0 in

Give the volume of the solute and volume of the solvent for a 0.50 M solution of HCI that would just neutralize 5.5 g of Ba(OH)2 starting with 6.0 M HCl. Express your answers using two significant figures. Enter your answers numerically separated by a comma.

Water has a density of 1.0g/mL at room temperature. State whether each of the following will sink or float when dropped in water? a) Paraffin wax (density = 0.90 g/cm³) b) Lime stone (density = 2.8 g/cm³) Paraffin wax sinks and limestone also sinks Paraffin wax floats while Lime stone sinks Paraffin wax sinks while Limestone floats Paraffin wax floats and Limestone also floats

A solution of 0.75 M HCl is reacted with excess Na₂CO3 to generate CO₂ as follows: Na₂CO3 + 2 HCI → H₂CO3 + 2 NaCl → 2 NaCl + H₂O + CO₂ As a result, a volume of 37.1 mL CO₂ is collected over water at 25°C and 755 mmHg. Given that the partial pressure of water vapor at these conditions is 23.8 mmHg, what volume of HCI was reacted?

How are density and specific gravity related? specific gravity is the mass of a substance divided by its volume; density is the specific gravity of a substance divided by the specific gravity of water. specific gravity is the inverse of density. they are not related to each other density is the mass of a substance divided by its volume; specific gravity is the density of the substance divided by the density of water.

Using the Ideal Gas Law, PV = nRT, where R = 0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the following reaction. The oxygen is collected at 2.22 atm and 25.44°C. Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer. 2KCIO3(s) 2KCI(s) + 302(g)

The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL bottle of water? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer.

The drain in your kitchen sink becomes plugged with solid fat such as glyceryl tristearate. How does adding Draino®, a strong NaOH lye, help unclog your drain? If there were 10g of glyceryl tristearate how much 0.500M NaOH would you need to add?

Explain what happens to the compressibility of matter as density decreases, and why

The density of solid gold at room temperature is 19.3 g/mL. Given a 45-mg sample of gold, what is the volume in mL? Click the answer you think is right. 8.7 x 10² mL 2.3 x 10³ mL 2.3 mL 2.3 x 10³ mL 8.7 x 10¹ mL

A scuba diving tank is designed to withstand 3000 psi of pressure from the compressed air inside. The pressure gauge of a "half full tank of air" reads 1105 psi at 18.0 °C. If the scuba tank is in a storage shed which catches on fire and the shed reaches a temperature of 500°C, then what will the pressure inside the tank reach, if the walls of the tank can hold? 1.46x10³ psi 2.63×10³ psi 2.93×10³ psi 3.22×10³ psi

0 of 12 > During an experiment, a student adds 1.23 g CaO to 200.0 mL of 0.500 M HCI. The student observes a temperature increase of 5.10 °C. Assuming that the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/g °C, calculate the heat of the reaction, AHrxn- CaO(s)+2H*(aq) — Ca2+(aq) + H,O(0) AHrxn kJ/mol

A helium-filled weather balloon has a volume of 796 L at 15.9°C and 759 mmHg. It is released and rises to an altitude of 7.80 km, where the pressure is 331 mmHg and the temperature is -30.1°C.

Two flasks are connected with a stopcock. Flask #1 has a volume of 2.5 L and contains oxygen gas at a pressure of 0.70 atm. Flask #2 has a volume of 3.8 L and contains hydrogen gas at a pressure of 1.25 atm. When the stopcock between the two flasks is opened and the gases are allowed to mix, what will the resulting pressure of the gas mixture be?

What assumptions are made about the gas in the ideal gas equation model? Consider Volume (particle vs. container volume) Intermolecular forces Temperature (high or low?) Pressure (high or low?)

A student is doing experiments with CO₂, gas. Originally, a sample of the gas is in a rigid container at 299K and 0.70 atm (atmosphere). The student increases the temperature of the CO2, gas in the container to 425K. In terms of kinetic molecular theory, briefly explain how and why the pressure of the CO₂ gas in the container changes as it is heated to 42K.

A sample of krypton gas at a pressure of 1.01 atm and a temperature of 193°C, occupies a volume of 779 mL. If the gas is heated at constant pressure until its volume is 907 mL, the temperature of the gas sample will be °C.

A gas sample has a volume of 425 mL at a pressure of 0.875 atm. If the pressure of the gas is changed to 4.250 atm, what is the new volume of the gas? (The temperature is kept constant.)

Calculate the pressure exerted by 2.50 L of HF gas containing 1.35 moles at 320 K? 1.00 atm 8.96 atm 14.2 atm 6.25 atm

What is the molality of ions in a 0.315 m solution of Na₂SO4 assuming the compound dissociates completely?

A gas occupies a 1.5 L container at 25 degrees Celsius and 2.0 atm. If the gas is transferred to a 3.0 L container at the same temperature, what will be its new pressure? 1.0 atm 2.0 atm 4.0 atm 3.0 atm

A sample of oxygen gas has a volume of 150 mL with a pressure of 0.947 atm. What will the volume be if pressure is increased to 770 torr? 158 mL 100 mL 0.18 mL 141 mL

Three samples of an ideal gas, all at the same temperature, occupy identical containers with the same volume. Assume that the mass of the particle is proportional to its size. Which of the gas samples has the greatest pressure?

Determine the number of moles of gas contained in a 1.25 L container at 25 degrees Celsius and 800 torr? 40.9 mol 7.02 mol 0.0646 mol 0.0538 mol

As the volume of a 1 mole sample of gas increases, with temperature remaining constant, the pressure exerted by the gas: decreases increases remains the same