CIVA Chemistry Final Prep

Chemistry

100

c= 0.444 J/gC A 454g iron block initially at 16 degrees Celsius absorbs 63.9 kJ of heat. What is the final temp of the block? (Hint: q=m*c*deltaT

333 degrees

200

For this procees, delta H (or enthalpy) is negative.

What is exothermic

300

A hypothesis is a prediction based on evidence

What is TRUE

400

Balance the following:

AlBr3 +  Cl2 →  AlCl3 +  Br2

What is 2AlBr3 +  3Cl2 →  2AlCl3 +  3Br2

Year

100

This is the frequency of a wavelength of light at 400nm?

What is 7.495x10^14 1/s

200

What is the charge on Magnesium in MgCl2?

2+

300

What would be the charge on a calcium ion? Does this ion have a bigger or smaller atomic radius than elemental calcium?

2+, It would be a smaller ion.

400

[He]2s2 2p5

Fluorine

500

Isotopes are atoms of the same element, but with:

What is different numbers of neutrons

End

100

Draw the Lewis structure for CO2

CO2

200

Draw the lewis structure for H2O

H2O

300

Lewis structure for NH3

NH3

400

What happens when an electron in an excited state returns to ground state?

What is it releases a photon of light

500

Difference between an ionic or covalent bond

Ionic is metal to nonmetal, donation of electrons Covalent is nm to nm, sharing of electrons

Finals

100

All molecules have this intermolecular force

What is London Dispersion

200

What is the avg atomic mass of this element?

28.0amu   at 92.2%

29.0amu   at 4.67%

30.0amu   at 3.11%

What is 28.1amu

300

The normal boiling point of HCl is -84.8 and the normal melting point of HCl is -114. At 1 atm, and -84.8 degrees, what phase is HCl in?

Half liquid half vapor

Prep

100

Problem 1 Ch. 15

What is unsaturated

200

Ch 15. Problem 2

Will dissolve