How many kilocalories are needed to vaporize 5.8 mol of Br2?

Q: A sample of mercury has a density of 13.6 g/cc at 37 0C. Calculate the specific gravity of mercury

A: Specific gravity or relative gravity is dimensionless quantity which refers to ratio of mass of…

Q: The following reaction plays a key role in the destruction of ozone in the atmosphere: Cl(g)+ O3…

A: Entropy is a measure of the randomness of a system. It the measure of a system's energy per unit…

Q: How many kilojoules are released by freezing 2.5 mol of H2O?

A: Enthalpy of freezing (∆Hfree) is used to calculate energy needed to release when liquid becomes…

Q: Calculate these masses.

A: A large amount of unspecified size is known as mass. It is denoted as m.  The amount of space an…

Q: What is the mass number of hydrogen? Of helium?

A: The total number of protons and neutrons in an atomic nucleus is called the mass number.

Q: What is the total entropy change if a 0.310 efficiency engine takes 3.96E3 J of heat from a 304 degC…

A: Given the δQH of energy flow into the system the system's entropy changes by: dSsys=δQH/Tsys

Q: What is the empirical formula for a compound that is 26.56% potassium, 35.41% chromium, and 38.03%…

A: A compound's empirical formula communicates a ratio between the numbers of atoms of various elements…

Q: What is the mass in grams of 6.022 * 1023 O atoms of mass 16.00 amu?

A: The mole concept is a convenient method of expressing the amount of a substance. Any measurement can…

Q: When measuring the volume of a liquid in a graduated cylinder, at which point should the measurement…

A: A graduated cylinder is used to meausre the volume of liquids. Liquids that are to be measured can…

Q: How many moles of chlorine gas at 120. °C and 33.3 atm would occupy a vessel of 39.0 L?

A: The ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation…

Q: Po-210 is an alpha emitter with a half-life of 138 days. Howmany grams of Po-210 remain after 552…

A: Given Values: t1/2 = 138 days t = 552 days No = 5.80 g Nt = ??

Q: What mass of gallium oxide, Ga2O3, can be prepared from 29.0 g of gallium metal? The equation for…

A: A chemical reaction where there is loss of electrons or gain of oxygen and resulting in the increase…

Q: Why is 350°C water emitted from a black smoker not boiling?

A: Black smokers are one of the types of hydrothermal vents that are found in deep sea beds and appear…

Q: If 4.00 L of ethyl alcohol at 18.0 ⁰C is exposed to a temperature of 25.0 ⁰C, what is the resulting…

A: Initial temparature of ethyl alcohol is T₁ = 18° C = (273 +18) K = 291 K rising the temparatute to…

Q: A sample of 8.00 mol of gas in a 10.00 L container is at 45.0 °C. What is the pressure (in atm) of…

A: Moles of the gas (n) = 8 mol Volume of the container (V) = 10 L Temperature (T) = 45 + 273 = 318 K…

Q: The standard heat of combustion of liquid methyl cyclopentane, C6H12(l),C6H12(l), was measured to be…

A: Fuels are materials such as coal, gas, wood, or oil that store potential energy as when combusted in…

Q: How many mL of 0.254 M NaOH are needed to fully react with 37.50 mL of 0.358 M H2SO4?

A: Concentration of the NaOH = 0.254 M Conc. of H2SO4 solution = 0.358 M or conc. of [H+]=2×0.358 M…

Q: 15.0 L of an ideal gas at 298 K and 3.36 atm are heated to 383 K with a new pressure of 6.05 atm.…

A: Volume of solution is a measure of the concentration of a substance in a solution.

Q: At what pressure in atm does ethane (C₂H₆) have a density of 37.2 g/L at 75.0 °C?

A: The pressure of the ethane gas can be calculated by the ideal gas equation. PV = nRT Number of moles…

Q: A 75.0 g piece of Ag metal is heated to 80.0 C and dropped into 50.0 g of water at 23.2 ° C. The…

A: To find: Specific heat of silver

Q: Calculate the enthalpy of vaporization at the normal boiling point (760 mmHg) of the liquid(water,…

A: The enthalpy of vaporization also known as heat of vaporization or heat of evaporation is the amount…

Q: What is the vapor pressure of a liquid?

A: As the liquid is heated at a particular (T) temperature, the molecules of water attains kinetic…

Q: determine the density of a metal that has a mass of 2.17g and a volume of 0.35 cm^3

A: The unit of density is gm/cm3 .

Q: How many liters of dry hydrogen gas, measured at 798 mmHg and 21C, will be released by the…

A: When change in pressure, volume and temperature occurs than the combined gas law is used. Combined…

Q: How many collisions does single Ar atom make in 1.0 s when the temperature is 25 degrees Celsius and…

A:

Q: the vapor phase concentration in ppm(v)?

A: Vapour phase concentration is the amount of water vapor present in a unit volume of air, usually…

Q: What is the dose in mSv for 2.5 mGy of neutron exposure to the eye?

A: Consider 0.1 Gy x-ray Find the dose in my by using the relationSv = Gyx RBE

Q: What is the effect of pressure on a liquid’s boiling point?

A: The boiling point is considered as the temperature at which the vapor pressure of the liquid becomes…

Q: Write the nuclear equation for the alpha decay of Po-214.

A: The radioactive decay process is defined as the loss of energy by an unstable nucleus via emitting…

Q: Write the nuclear equation for the positron decay of C-11.

A: C-11 is a radioisotope of carbon. C-11 is an unstable atom that disintegrates by emitting radiation.…

Q: What is the Mass of 3.5 L of H2O

A: Given: The Mass of 3.5 L of H2O.

Q: When oxygen is exhausted in a milk sample, what color is the methylene blue indicator?

A: Methylene blue stain is a basic dye that colors nucleic acids and acidic carbohydrates. It is used…

Q: What three elements are required to start and sustain a fire?

A: For a chemical reaction to carry out, we need chemical compounds, atoms, or some molecules to react…

Q: A helium gas cylinder of the sort used to fill balloons has a volume of 0.180 m3 and a pressure of…

A: The ideal gas law is equation of state of a hypothetical ideal gas where the Pressure, Volume,…

Q: Calculate the standard Gibbs energy of formation of H,O(g) at 25 °C.

A: The reaction of the formation of water is:  2H2(g)+O2(g)⟶2H2O(l) Gibb's Free Energy calculation…

Q: How many kilojoules are released by the combustion of 17.0 g of C8H18?

A: Carbon is the key element fount in all organic molecules. carbon have 4 valency. Based on the carbon…

Q: How is Kw defined, and what is its numerical value at 25 °C (298 K)?

A: As we know that the pure water is a considered as weak electrolyte that is  H2O ⇔H++ OH-

Q: How can the temperature of steam be raised above 1008C? Which instrument is based on this technique…

A: Heat is one of the antimicrobial agents.

Q: Using the table above, make the following unit conversions. Determine th point the appropriate…

A: 1. 25/1000 = 0.025  2. 3*1000000= 3000000 3. 150/10 = 15  4. 5000/1000 = 5  5. 0.075 kl

Q: What volume in liters would 20.0 moles of sulfur dioxide occupy at 75.3 °C with a pressure of 2.40…

A: Moles of sulfur dioxide (n) = 20 moles Temperature (T) = 75.3 + 273 = 348.3 K Pressure (P) = 2.40…

Q: The amount of heat in kJ required to convert 0.7 gal of liquid water to steam equal… ?

A: 0.7 gallon of water  1 gallon = 3.7854 kg water 0.7 gallon = 2.65 kg water

Q: If a liter of a cough syrup weighs 1285g, what is the specific gravity?

A: Specific gravity can be defined as the ratio of the substance's weight to the weight of the equal…