General Math and Unit Conversions
The statement you evaluate by doing experiments.
What is a hypothesis?
Salt water is an example of this type of matter.
What is homogenous mixture?
Combining small nuclei into larger nuclei is the major characteristic of this type of chemical reaction.
What is nuclear fusion?
This is the name of the element symbolized by Be.
What is beryllium?
Hydroxide is the name of this polyatomic ion.
What is OH-?
0.052308700 has this many significant figures.
What is 8?
Dry ice subliming to gaseous carbon dioxide is an example of this type of change (physical or chemical).
What is a physical change?
This is the symbol of what is emitted during alpha decay.
What is 42He?
The element in the 3rd period with the largest size.
What is sodium?
The electronegativity of N is 3.0 and of O is 3.5. This is the type of bond in nitrogen dioxide.
What is polar covalent?
The number of grams present in a 4 Gg sample.
What is 4 x 109 g?
56 oF is this many kelvin.
What is 290 kelvin?
Radioactive isotopes are produced by bombarding nonradioactive isotopes with this.
What is a high-speed particle? (Examples can include alpha particle, proton, neutron, and small nuclei).
The element in group 6A that has the highest ionization energy.
What is Oxygen?
Fe stands for iron. The name of the compound FeN.
What is iron(III) nitride?
The number of cc's present in a full 2 TL bottle.
What is 2 x 1015 cc?
How much energy is required to raise the temperature of 5.10 grams of ammonia from 15.0oC to 34.0oC.
What is 198 J? (or 0.198 kJ or 47.3 cal).
This is the symbol of the unknown element released during the nuclear fission of 23692U.
23692U --> 9136Kr+ ? + 3 10n + energy
What is 14256Ba?
This is the electron arrangement of phosphorus.
What is 2,8,5?
The total number of lone pairs of electrons present in SiCl4.
What is 12 pairs?
0.0020 x (587.1-0.0684).
What is 1.2?
This is the energy (in kJ) required to raise the temperature of 23.2 grams of ice at 0.0oC to 50.oC.
The specific heat of water is 4.184 J/goC, the heat of vaporization is 2260 J/g, and the heat of fusion is 334 J/g.
What is 13 kJ?
A 246 mg sample of bromine-77 contains 7.6875 mg after 11.875 days. This is the half-life of bromine-77 in hours.
What is 57 hours?
The number of neutrons present in Pd-128.
What is 82?
The bond angle found in ClCN (where C is the central atom).
What is 180 degrees?