Hurricane Chemistry

Another excellent Edublogs.org weblog

Hurricane Chemistry

Matter

April 26th, 2011 · 16 Comments · Matter

Why does temperature remain constant during a phase transition?

(a) because no energy is exchanged in the process

(b) because frozen substances always keep their surroundings cold

(c) because the energy gained or lost is all used by molecules transitioning from one phase to another

(d) because Albert Einstein predicted it

Tags:

Acid/Base

April 26th, 2011 · 21 Comments · Acid/Base

Bases can be referred to as:

(a) none of the choices

(b) proton accepters

(c) proton donors

(d) protons

Tags:

Acid/Base

April 26th, 2011 · 26 Comments · Acid/Base

Acidic foods can be identified by what taste?

(a) bitter

(b) salty

(c) sour

Tags:

The Atom

April 26th, 2011 · 17 Comments · Atomic Structure

Which part of Dalton’s original atomic theory must be modified with the discovery of isotopes?

(a) All atoms of a given element are identical

(b) Atoms combine with other atoms in whole number ratios to form compounds

(c) Compounds are formed when elements enter into chemical reactions

(d) Matter is composed of atoms

Tags:

Atomic Structure

April 26th, 2011 · 25 Comments · Atomic Structure

Ions are:

(a) charged atoms

(b) electrons

(c) neutrons

(d) protons

Tags:

Matter

April 26th, 2011 · 15 Comments · Matter

12 grams of carbon react with 32 grams of oxygen to form exactly 44 grams of carbon dioxide. This is a good example of:

(a) Democritus’ theory

(b) Priestley’s experiments

(c) the law of conservation of mass

(d) the law of multiple proportions

Tags:

Matter

April 26th, 2011 · 18 Comments · Matter

Although all parts of Dalton’s atomic theory are important, which one of the postulates is crucial to explain the observations summarized by the Law of Definite Proportions?

(a) Atoms are very small

(b) Atoms chemically combine with other atoms in fixed, whole-number ratios

(c) Atoms of the same elements have the same properties

(d) Matter is composed of atoms

Tags:

Matter

April 26th, 2011 · 13 Comments · Gas Law

Which one of the following is not part of Dalton’s atomic theory?

(a) Atoms change into other atoms in chemical reactions

(b) Atoms of different elements have different properties

(c) Atoms of the same element have the same chemical properties

(d) Matter is composed of atoms

Tags:

Nuclear Chemistry

April 26th, 2011 · 11 Comments · Nuclear

 Beta radiation is the:

(a) transmutation of a neutron into a proton and electron. The electron is emitted.

(b) transmutation of a neutron into a proton and electron. The proton is emitted.

(c) transmutation of a proton into a neutron and electron. The electron is emitted.

(d) transmutation of a proton into a neutron and electron. The proton is emitted.

Tags:

Nuclear Chem

April 26th, 2011 · 12 Comments · Nuclear

After three half-lives, what fraction of the original radioactive isotope remains?

(a) 1/16

(b) 1/2

(c) 1/4

(d) 1/8

Tags: