chem final

Which statement is correct for avocados law of gases?

Volume~ number of moles(at constant temperature and pressure)

Mixture of He, No, and Ar has a pressure of 12.4 atm. The partial pressure of He is 461 pressure of Ar is 233 kPa. Calculate the partial pressure of N2 in atm.

5.55 atm

According to Dalton's law of partial pressure what will be total pressure of a box having 02, N2 and Cl2 gas

Ptotal = PO2 +PN+PCl2

Express 364 torr as atm

0.479

A twinkie snack cake contains 150 calories of energy. Convert this value to joules

630J

What will be the sign convention for heat q if a system absorbs 250 KJ heat

Q= 250kJ

How will the pressure of an ideal gas change if the number of moles are doubled while absolute temperature and volume decrease by half?

The pressure is doubled

A 50.0 g sample of an unknown substance, initially at 20.2 °C, was heated with 1.55 kJ of energy. The final temperature of the substance was 125.0 °C. Determine the specific heat of this substance

0.296 J/g°C

What is calorimetry

Colorimetry is the science where we measure heat flow involved in a chemical or physical process

Low density, compressibility, and high degree of freedom is belong to which state of matter

Gas

Estimate the heat energy required to raise the temperature of 5.0g of ice by 5.0C. The specific heat od is approximately 2 K/g°C

50J

Determine temperature change when 5.15 kJ of heat is added to 250.0 g of water.

4.92°C

Unit of heat and work is

Joule and Joule

Determine the final temperature after 25.0 kJ of energy is added to 500.0 g of water initially at 21.5 °C.

33.5°C

What is a manometer device?

A manometer is a device used to measure pressures other than atmospheric pressure, specially for gases

Calculate the overall change in internal energy for a system that absorbs 100 J of heat and does 110 J of work on the surroundings

-10J

Select true statement

Work done on system has the positive value of w

Calculate the final volume when the pressure of 200mL sample of gas changes from 2.0 atm to 1.0 atm at constant temperature

400mL

Which parameter among pressure, temperature, volume, and number of moles we will keep constant in Boyles Law(in gases calculation)

Temperature

What pressure is exerted by 129.5 g of CH4 in a 0.3900L steel container at 215.7K?

366.4atm

How many unpaired electron should be present in As element?

3

Which statements is false?

If a subshell contains two electrons, then it must be an s subshell

What is photoelectric?

The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material

What is the correct statement for increasing the frequency trendM

Gamma rays > X-RAYS > UV- rays > Visible light > Infrared > microwaves > Radio waves

The particle nature of electromagnetic can be explained as

Both (a) and (b)

Which is the representative elements?

Group 1 and 2 elements

Which of these is the highest first ionization energy?

Ne

Which is the highest electronegativity value?

S element

What are metalloids?

Elements that show both property's of metal and nonmetal

Use the periodic table to predict which element had the largest atomic radius

Fr

Select the type of subshell that can hold the least electrons

s(2 electrons)

How many valence electrons are in an atom of a group 15 element?

5

Select the valence electrons configuration of a group 2 element

ns2

Which of these has the largest ionic radius?

I-

Electronegativity increases towards the (blank) of periodic table

Top, right

What group are noble gases?

Group 18th

Write the electronic configuration for se

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p4

If the first two quantum numbers for an electron are n = 4 and e = 1, which energy level and subshell does that electron occupy?

4p

Calculate the wavelength of light that corresponds to a frequency of 2.30x10^12 per second. Report your answer in units of centimeters.

0.01304

What is the value of I and m if the value of the principle quantum number is 3

1= 0, 1,2

m=-2, -1, 0, +1, +2