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Chemistry

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Laverna Senger

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Cards in this guide (11)
What is a flame test

Answer By exposing materials to a hot flame (from a Bunsen burner typically), the color of the flame can be used to identify the material. Certain elements give off a characteristic color when heated to high temperature. See the Related Links for "Wikipedia: flame test" to the bottom for the answer.

A method of obtaining an emission spectrum from a sample

What is specific heat capacity

specific heat capacity of a substance is defined as the QUANITY OF HEAT REQUIRED to raise the temperature of 1 Kg of the substance through 1K ( kelvin ) .

however it obtained the unit of J/kg/k

The specific heat capacity is the energy required to raise the temperature of 1 kg of material by 1 degree Celsius.

_____________________

Apex: The energy needed to change the temperature of a substance The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

What is the frequency of a wave

The frequency of a wave, represented by the letter f, is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The SI unit of cycles per second is called hertz or Hz. Hz can be expressed as a reciprocal second (s-1 or 1/s).

The number of waves that pass a point in 1 second

What does a negative H tell about a reaction

The reaction is exothermic.

What does an electromagnetic spectrum refer to

A range of wavelengths of light that increases from one end to the other

What could the fourth quantum number of a 2s2 electron be

ms= +1/2

What is the value for G at 300 K if H 27 kJmol and S 0.09 kJmolK

G = 0 kJ/mol

Which of the following describes a spectrum apex

A range of wavelenghs of frequencies of electromagnetic raditation

What is the wavelength of a light of frequency 4.47 X 1014 Hz

The wavelength is 671 nm.

What is the energy of a photon that emits a light frequency of 7.21 x 1014 Hz

4.78 x 10-19

How much energy is released is a sample loses 0.05 kg mass through radioactive decay

4.5 × 1015 J

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